BIOL 256 Exam 3
In muscle action potential, the wave of positive mV charge travels through the _____ to the sarcoplasm from the sarcolemma. a. T-tubules b. sarcomeres c. mitochondria d. epimysium
A
In the dynamics of blood flow through capillaries, hydrostatic pressure a. Is the same as capillary blood pressure b. Does not play a role c. Is completely canceled out by osmotic pressure d. Generally forces fluid from the interstitial space into the capillaries
A
A lack of intrinsic factors leading to a deficiency of vitamin B12 and large pale red blood cells called macrocytes, is characteristic of: a. Sickle-cell anemia b. Pernicious anemia. c. Aplastic anemia d. polycythemia
B
A neurotransmitter used at a motor end plate is a. Serotonin b. Acetylcholine c. Epinephrine d. Dopamine
B
Acetylcholine a. Retards the passage of nerve impulses to the heart b. Decreases the heart rate. c. Relaxes cardiac muscle fibers d. Is released by sympathetic postganglionic neurons
B
Acute leukemia is more common in --- persons; chronic leukemia is more common in --- persons a. Older, younger b. Younger, older
B
After nervous stimulation of the muscle cell has ceased, the acetylcholine a. Level in the cytoplasm drops b. Is destroyed by acetyl choline esterase c. Is actively pumped into the extracellular fluid for storage until the next contraction d. Is chemically bound to the filaments
B
A heart beat is normally initiated when a. a nerve impulse arrives from the cardiovascular center of the brain. b. the critical volume of blood fills the ventricles. c. enough Ca++ enters the cells of the sinoatrial node to reverse their resting potentials. d. enough K+ exits the cells of the sinoatrial node to reverse their resting potentials
C
Athletes sometimes complain of oxygen debt, a condition that results when insufficient oxygen is available to completely break down pyruvic acid. As a result, the pyruvic acid is converted to a. A strong base b. Stearic acid c. Lactic acid d. Hydrochloric acid
C
Damage to the --- is referred to as heart block a. Atrioventricular bundle b. Atrioventricular valves c. Atrioventricular node d. Sinoatrial node
C
Fred's blood was determined to be AB positive. What does this mean? a. His blood lacks Rh factor b. Antibodies to A and B are present in the red cells c. There are no antibodies to A, to B, or to Rh antigens in his plasma. d. He can only receive blood from a donor who is O positive
C
Glucose delivered to a recovering myofiber is used to a. Act as a third messenger b. Bind to regulatory sites on troponin, changing the configuration c. Reestablish glycogen stores d. Initiate the conversion of carbon dioxide to oxygen for storage
C
If cardiac muscle is deprived of its normal blood supply, damage would primarily result from a. An inadequate supply of lactic acid b. A decrease in the number of available mitochondria for energy production c. Lack of energy in myofibers d. A lack of nutrients to feed into metabolic pathways
C
On an EKG, depolarization of the ventricles is represented by the a. P wave b. T wave c. QRS complex d. P-Q interval e. S-T segment
C
Select the correct statement regarding blood cell formation a. The spaces in the lacunae of compact bone serve as the locale of white blood cell formation b. Yellow marrow is the main site of leukocyte formation c. Red marrow is the main site of blood cell formation throughout adult life d. The main sites of blood cell production in adults are the spleen and the liver
C
Smooth muscle is characterized by all of the following EXCEPT a. it lacks troponin. b. there are noncontractile intermediate filaments that attach to dense bodies within the cell. c. there are no sarcomeres. d. smooth muscle cannot contract when it is stretched
C
The blood vessel type allowing exchange of respiratory gases, delivery of nutrients, and removal of wastes to and from the tissues is the a. Artery b. Vein c. Capillary
C
The diameter of blood vessels most directly affects a. Venous return b. Blood viscosity c. Resistance d. Heart rate e. Stroke volume
C
The father is Rh- and the mother is Rh+. They have had three children without adverse problems due to the Rh factor. The mother is pregnant again. In terms of the Rh factor, the risk to this fetus a. Is less than before b. Is greater than beforer c. Never was a problem d. Is the same, about 50%
C
Aldosterone will a. Decrease sodium reabsorption b. Result in a larger output of urine c. Promote a decrease in blood volume d. Promote an increase in blood pressure
D
An elaborate network of membranes in skeletal muscle cells that functions in calcium storage is the a. intermediate filament network. b. myofibrillar network. c. mitochondria. d. sarcoplasmic reticulum.
D
A drop in blood pressure stimulates the cardiovascular center to a. Increase blood pressure and heart rate via epinephrine b. Increase blood pressure and heart rate via acetylcholine c. Send a parasympathetic nerve system impulse to the baroreceptors d. Promote active transport of Na+ into the sinoatrial node
A
A motor neuron and the myofibers it innervates is known as a(n) a. Motor unit b. Sarcomere c. Aponeurosis d. Fascicle
A
A motor unit is... a. A motor neuron and myofibers its stimulates b. A motor neuron and all associated glial cells c. Groups of myofibers working together to allow a particular movement d. Groups of motor neurons working together to allow particular movements
A
A person with chronic leukemia is ____ likely to suffer a bacterial infection in/on their body a. More b. Less
A
A sustained and frequent muscle stimulus brings about a. Tetanus b. Recruitment c. Treppe d. A brief muscle twitch
A
Blood pressure peaks each day (assuming awakening in the morning, and going to sleep at night). a. In the morning b. At noon c. In the evening
A
Blood-by-passing a capillary bed flows through its a. Metarteriole b. Fenestra c. Sinusoid d. Pericytes
A
Cancer of the lymphoblasts developing quickly in a young child would be called a. Acute lymphocytic leukemia. b. Chronic lymphocytic leukemia c. Aplastic anemia d. leukopenia
A
Cardiac ischemia can result in a. A myocardial infarction b. Thallasemia c. Reticulocytosis d. An atrioventricular bundle block
A
During the period of ventricular filling, a. Blood flows from the atria through the open atrioventricular valves b. It is represented by the P wave on the EKG c. The atria remain in diastole d. Blood pressure in the heart is at its cycle peak
A
Immediately following the arrival of the stimulus at a skeletal muscle cell there is a short period called the _______ period during which calcium ions are released from the terminal cisterae. a. Latent b. Refractory c. Contraction d. Relaxation
A
In an isometric contraction, muscles a. Stay the same length b. Shorten in length c. Myofilaments slide d. Steroids accumulate
A
Negative chronotropic factors are a. Factors that decrease heart rate b. Factors that decrease afterload c. Factors that increase afterload d. Factors that increase heart rate
A
Carbon dioxide is transported by RBC; it is carried in part by a. Attaching to the iron in heme b. The amino acids of hemoglobin c. Integrins in the plasma membrane d. Nitric oxide
B
Each muscle fiber is stimulated by a nerve ending known as a(n) a. Sarcomere b. Motor end plate c. Endomysium d. Sarcoplasmic reticulum
B
Formed elements found in the blood that are about 7-8 Um in diameter with no nuclei are a. Lymphocytes b. Erythrocytes. c. Monocytes d. neutrophils
B
In an isotonic contraction, the muscle a. rapidly resynthesizes creatine phosphate and ATP. b. changes in length and moves the "load." c. does not change in length but increases tension. d. never converts pyruvate to lactate.
B
No visible cytoplasmic granules are present in a. eosinophils. b. monocytes. c. basophils. d. neutrophils.
B
The Frank-Starling law of the heart states that the heart contracts less forcefully when it fills with more blood. a. True b. False.
B
The Lub heart sound occurs with the _____ closing, while the Dub heart sound occurs as _____ valves close a. Semilunar, atrioventricular b. Atrioventricular, semilunar
B
The buffy coat of centrifuged blood consists mainly of a. Red blood cells b. White blood cells and platelets. c. Gamma globulins d. Serum e. The ejected nuclei of red blood cells
B
The least abundant human leukocytes are the a. Lymphocytes b. Basophils c. Erythrocytes d. Thrombocytes e. Neutrophils
B
The role of calcium ions in muscle contraction is to a. Act as a third messenger b. Bind to regulatory sites on troponin, changing troponin shape c. Reestablish glycogen stores in the T-tubules d. Initiate the conversion of carbon dioxide to oxygen for storage
B
What causes the sounds heard in an artery when blood pressure is measured? a. Leaky valves b. Turbulence c. Electrical activity of the tunica interna d. Increased capillary numbers
B
When increasing stimuli bring about more and more fibers in a contracted state, this is called a. Tetanus b. Recruitment c. Treppe d. A brief muscle twitch
B
When you go from sitting or lying down to standing too quickly, you feel dizzy. The drop in blood pressure stimulates vasoconstriction and increased heart rate to compensate. This is called the a. vasomotor reflex. b. baroreceptor reflex. c. cardiovascular reflex.
B
Which is not a term referring to the immune system proteins made by plasma cells a. Antibodies b. Beta globulins c. Gamma globulins d. Immunoglobulins
B
Which of the following chemicals does NOT control blood pressure? a. ADH b. nitric acid c. nitric oxide d. atrial natriuretic peptide
B
Which of the following is a precursor of a lymphocyte a. Myeloblast b. Lymphoblast c. Monoblast d. Megakaryoblast
B
Which provides a positive chronotropic effect on the heart? a. norepinephrine b. acetylcholine c. stimulation via the vagus nerve d. endurance exercise effects on a trained athlete when at rest
B
Which takes the longest time in a contracting skeletal myofiber? a. latent period b. depolarization c. refractory period d. recovery
B
Which blood protein(s) carries oxygen from the lungs to the tissues a. Albumin b. Gamma globulins c. Alpha globulins d. Fibrinogen e. Hemoglobin
E
Which is NOT directly involved in maintaining your blood pressure? a. The heart b. The blood vessels c. The brain d. The kidneys e. The thymus
E
A sarcomere is a. Composed of myosin and connective tissue b. The area between two intercalated discs c. The wavy lines on a muscle seen in the microscope d. The area between two Z discs
D
Gas exchange occurs in a. Veins b. Arteries c. Venules d. Capillaries
D
Which is a risk factor for essential hypertension? a. arteriosclerosis b. excessive renin secretion c. circulatory shock d. obesity e. Addison's disease
D
Heart sounds other than those caused by closing of valves are called a. murmurs. b. ischemia. c. heart blocks. d. myocardial infarctions. e. stenoses.
A
Hemorrhage with a large loss of blood causes a. A lowering of blood pressure due to change in cardiac output b. No change in blood pressure but a change in respiration c. No change in blood pressure but a slower heart rate d. A rise in blood pressure due to change in cardiac output
A
If a person has hepatitis, the liver may not convert bile pigments normally or transport them appropriately to the gall bladder. Thus, pigments accumulate in the blood; this is called jaundice. Which bile pigment would you expect to be in highest concentration in the blood of a person with this condition? a. bilirubin. b. biliverdin. c. urobilinogen. d. Stercobilin
A
If acetylcholine is applied to the heart, but cardiac output is to remain constant, which of the following would have to happen? a. Stroke volume must increase b. Venous return must decrease c. The force of contraction must decrease d. The rate of conduction of impulses through the AV bundle must increase e. The oxygen content of blood in coronary circulation must increase
A
If lymphatic vessels are blocked, then in areas drained by the blocked vessels a. Interstitial fluid hydrostatic pressure increases b. Blood colloid osmotic pressure increases c. Interstitial fluid hydrostatic pressure decreases d. Blood hydrostatic pressure increases e. Interstitial fluid osmotic pressure decreases
A
Influence of blood vessel diameter on peripheral resistance is a. Significant bc resistance goes up when the diameter goes down b. The only factor that influences resistance c. Significant bc resistance goes up when the diameter goes up d. Insignificant bc vessel diameter does not vary
A
Muscle cells work together in groups known as motor units. These consist for a motor neuron and a. the muscle fibers innervated by it b. its postsynaptic motor neurons. c. its presynaptic neurotransmitter vesicles. d. the associated Schwaan cells.
A
Normal heart sounds are caused by which of the following events? a. closure of the heart valves b. friction of blood against the chamber walls c. excitation of the SA node d. contraction of ventricular muscle
A
Oxygen is stored in myofibers on/in a. Myoglobin b. Mitochondria c. Myosin d. ATP
A
Oxygen is transported by red blood cells, it is carried by a. attaching to the iron ion in heme. b. the amino acids of hemoglobin. c. integrins in the plasma membrane. d. nitric oxide.
A
Peripheral resistance a. Increases as blood viscosity increases. b. Increases as blood vessel diameter increases c. Decreases with increasing length of the blood vessel d. Is not a major factor in blood pressure in healthy
A
Poor nutrition may lead to a. Orthostatic hypotension. b. Chronic hypotension c. Acute hypertension d. Essential hypertension
A
Red blood cells do not consume any of the oxygen they transport because they a. do not have mitochondria. b. cannot remove oxygen from the heme, once it is attached. c. use carbon dioxide in the respiratory chain instead of oxygen. d. do not need to generate any ATP. e. convert oxygen to globin during transport.
A
The cardiac muscle contraction occurs when a. Ca++ enters the myofibers through slow channels. b. Na+ diffuses into myofibers. c. number of Ca++ ions stored in the sarcoplasmic reticulum is high enough. d. absolute refractory period begins. e. up-and down-regulation of beta adrenergic receptors on the cells.
A
The dicrotic notch refers to the a. Brief rise in aortic pressure caused by backflow of blood rebounding off the aortic semilunar valve. b. Brief rise in aortic pressure caused by backflow of blood rebounding off the mitral valve c. Brief rise in pulmonary artery pressure caused by backflow of blood rebounding off the pulmonary semilunar valve d. Brief rise in pulmonary artery pressure caused by backflow of blood rebounding off the tricuspid valve.
A
The functional unit of a skeletal muscle is a. A sarcomere b. A myofibril c. The sarcoplasmic reticulum d. A myofilament
A
The myocardium requires ____ oxygen than skeletal muscle and has ____ mitochondria. a. more, more b. more, fewer c. less, more d. less, fewer
A
The second heart sound (dub of lub-dub) is caused by the a. Closure of the semilunar valves b. Ventricular filling c. Contraction of the right ventricular d. Closure of the mitral and tricuspid valves
A
The sliding filament model of contraction involves a. the Z discs sliding over the myofilaments. b. the shortening of thick filaments so that thin filaments slide past. c. actin and myosin shortening when sliding past each other. d. actin and myosin sliding past each other but not shortening.
A
When cardiac muscle cells die the result is a. Fibrosis (scarring) b. Their replacement by adipose tissue c. Hyperplasia d. Contraction
A
Which is the best definition of blood pressure? a. Force per unit area exerted on the wall of a blood vessel b. Friction encountered as blood passes through blood vessels c. Turbulence in blood vessels caused by atherosclerotic plaque d. Force of blood pooling in capacitance vessels near the heart
A
Which is the correct sequence of events in a cardiac myocardial action potential? a. Na+ inward flux, Ca++ inward flux, K+ outward flux b. Ca++ inward flux, Na+ inward flux, K+ outward flux c. Na+ outward flux, Ca++ outward flux, K+ inward flux d. K+ outward flux, Na+ inward flux, Ca++ inward flux
A
Which metabolic control substance causes capillary dilation in a tissue? a. Nitric oxide. b. Nitrogen c. Oxygen d. glucose
A
Which of the following are composed of actin? a. Thin filaments b. All myofilaments c. Thick filaments d. H discs
A
Which of the following is a precursor of a basophil? a. Myeloblast. b. Lymphoblast c. Monoblast d. megakaryoblast
A
Which of the following is a precursor of a neutrophil? a. Myeloblast b. Lymphoblast c. Monoblast d. Megakaryoblast
A
Which of the following is a protective function of blood? a. Prevention of blood loss. b. Maintenance of normal pH in body tissue c. Maintenance of body temperature d. Maintenance of adequate fluid volume
A
Which of the following is true about blood plasma? a. It is about 90% water b. It contains about 20 dissolved components c. It is the same as serum but without the clotting proteins d. The main protein component is hemoglobin
A
Which of the following surrounds a bundle of myofibers? a. Perimysium b. Fascicle c. Endomysium d. Epimysium
A
Which requires nervous system input for stimulation of muscle contraction? a. Skeletal muscle b. Cardiac muscle c. Smooth muscle
A
Which will increase blood pressure? a. Antidiuretic hormone. b. Atrial natriuretic peptide c. Nitric oxide d. Alcohol e. histamine
A
Which would be associated with prematurely ruptured erythrocytes? a. Hemolytic anemia b. Hemorrhagic anemia c. Aplastic anemia d. Polycythemia
A
An individual who is blood type AB negative a. Can donate to all blood types in moderate amounts b. Can receive any blood type in moderate amounts except those with the Rh antigen c. Can donate to types A,B, and AB but not to type O d. Can receive types A,B, and AB but not type O
B
Angina pectoris is a. An embryonic structure that develops into the aorta b. Pain accompanying myocardial ischemia c. The heart's location within the mediastinum d. Part of the cardiac conduction system e. The covering of the heart
B
Blood flow to the skin a. Increases when core body temperature drops so that the skin does not freeze b. Increases when environmental temperature rises c. Is controlled mainly by decreasing pH d. Is not an important source of nutrients and oxygen for skin cells
B
Bradycardia is a ___ heartbeat, while tachycardia is a ___ heartbeat. a. Normal, slow b. Slow, fast c. Fast, slow d. Fast, normal
B
Cardiac pacemaker potentials are initially caused by the opening a. Ryanodine receptor channels in the SR b. HCN "funny" channels (pacemaker Na+ channels) c. Voltage gated calcium channels d. Voltage gated potassium channels
B
Muscle tone is a. The ability of a muscle to efficiently cause skeletal movements b. A state of sustained partial contraction of muscles c. The condition of athletes after intensive training d. The feeling of well-being following exercise
B
Norepinephrine acts on heart muscle cells by a. Blocking the action of calcium b. Causing threshold to be reached more quickly. c. Causing a decrease in stroke volume d. Decreasing heart contractility
B
Sickling of red blood cells can be produced in those with sickle-cell anemia by a. travel at sea level. b. travel at high altitudes. c. tuberculosis. d. moderate exercise.
B
The effect of endurance-type athletic training may be to lower the resting heart rate. This phenomenon a. Is a sign of dangerous overextension b. Is caused by hypertrophy of the heart muscle. c. Does not occur in aerobic training d. Results in decreased cardiac output
B
The effects of endurance-type athletic training may be to lower the resting HR. this phenomenon a. Is a sign of dangerous overexertion b. Is caused by hypertrophy of the heart muscle c. Does not occur in aerobic training d. Results in decreased cardiac output
B
The muscle cell plasma membrane is called a a. Epimysium b. Sarcolemma c. Endomysium d. perimysium
B
The neurotransmitter used at a motor end plate is a. Serotonin b. Acetylcholine c. Epinephrine d. Dopamine
B
The normal lymphocyte percentage of white blood cells is a. Under 10% b. About 25%. c. Above 60% d. Variable, irregardless of health status
B
When erythrocytes are worn and tattered, the some of the hemoglobin molecule is recycled. Transferrin assists in this by a. Transferring the hemoglobin to the red bone marrow for incorporation into new red blood cells b. Transferring the iron to the red bone marrow where it can be reused c. The heme to the red bone marrow for incorporation into new red blood cells d. The globin to the red bone marrow for incorporation into new red blood cells
B
The first thing that stops a muscle contraction after a motor neuron stops releasing acetylcholine is a. acetylcholinesterase destroys the acetylcholine as it is removed from the membrane receptors. b. the action potential stops going down the T tubule. c. calcium ions are pumped into the myofiber's mitochondria d. the tropomyosin blocks the actin binding sites on myosin.
C
The neurotransmitter initiating a muscle action potential is a. Dopamine b. Glutamate c. Acetylcholine d. Serotonin
C
The primary organs whose macrophages are responsible for phagocytizing worn-out red blood cells are the a. Spleen and liver b. Spleen and kidneys c. Liver and kidneys d. Red bone marrow and lungs e. Lungs and kidneys
C
The stroke volume for a normal resting heart is ________ ml/beat a. 50 b. 90 c. 70 d. 130
C
The viscosity of blood most directly affects a. Venous return b. Stroke volume c. Systemic vascular resistance d. Heart rate
C
When old red blood cells are worn out, their components are recycled. The globin from the hemoglobin is a. Stored in adipocytes b. Excreted as bile pigments c. Metabolized as amino acids. d. Rearranged into gamma globulins
C
Which component of the intrinsic autorhythmicity system of the heart functions to assure that the ventricles contract after the atria? a. sinoatrial node b. bundle of His c. atrioventricular node d. purkinje fibers
C
Which is NOT a vital sign used to assess the cardiovascular system? a. pulse b. blood pressure c. serum cholesterol
C
Which is not a function of blood a. Transportation of nutrients b. Regulation of temperature c. Synthesis of hormones d. Protection from disease
C
Which of the following blood pressure readings would be indicative of hypertension? a. 110/68 in a 20-year-old woman b. 119/79 in a 70-year-old man c. 170/80 in a 50-year-old man. d. 105/78 in a 30-year-old man e. All of the above
C
Which of the following is NOT part of the conduction system of the heart? a. Bundle of His b. Atrioventricular node c. Atrioventricular valve. d. Sinoatrial node
C
Which of the following is NOT required for erythropoiesis? a. Synthesis of hemoglobin b. Ejection of the erythrocyte nucleus c. Production of vacuoles. d. Production of ribosomes
C
Which of the following is true about smooth muscles? a. Smooth muscle, like skeletal muscle, uses the regularly protein troponin to control contraction velocity b. Smooth muscle cannot stretch as much as skeletal muscle c. Certain smooth muscle cells can actually divide to increase their numbers d. Smooth muscle has well-developed T tubules at the site of the dense bodies
C
Which of the following surrounds the individual muscle cell? a. Perimysium b. Fascicle c. Endomysium d. epimysium
C
Which provides a long-term control for blood pressure a. Nervous system b. Hormones c. Blood volume
C
Which statement is true about an EKG a. The PQRS complex follows ventricular contraction b. The P wave is present only in patients who have had a heart attack c. The T wave indicates ventricular repolarization d. The Q-T intervals indicates the time of atrial contraction
C
If the vagus nerve to the heart were cut, the result would be a. parasympathetic stimulation would increase, causing a decrease in heart rate. b. the heart would stop, because the vagal nerves trigger the heart to contract. c. the atrioventricular node would become the pacemaker of the heart. d. the heart rate would increase by about 25 beats per minute.
D
Initiation of a normal heart beat is the responsibility of the a. Cardiovascular center b. Baroreceptors c. Vagus nerve d. Sinoatrial node e. Atrioventricular node
D
Myoglobin a. breaks down glycogen. b. produces the end plate potential c. is a protein involved in the direct phosphorylation of ADP. d. holds a reserve supply of oxygen in muscle cells.
D
Select the correct statement about cardiac output. a. Decreased venous return will result in increased end diastolic volume. b. A slow heart rate increases end diastolic volume, stroke volume, and force of contraction. c. If a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be decreased. d. Stroke volume increases if end diastolic volume decreases.
D
Skeletal muscle assists the heart in moving blood through a. Arteries b. Arterioles c. Capillaries d. Veins.
D
The first heart sound (lub of lub-dub) is caused by the a. Closure of the semilunar valves b. Ventricular filling c. Contraction of the right ventricle d. Closure of the mitral and tricuspid valves.
D
The function of hemoglobin is to a. Protect the DNA of erythrocytes b. Produce red blood cells c. Produce antibodies d. Carry oxygen e. Trigger the clotting cascade
D
The tricuspid valve is closed a. By the movement of blood from atrium to ventricle b. While the ventricle is in diastole c. While the atrium is contracting d. When the right ventricle is in systole
D
The velocity of blood flow a. is in direct proportion to the total cross-sectional area of the blood vessels. b. is slowest in the capillaries because the total cross-sectional area is the greatest. c. is slower in the arteries than capillaries because they possess a relatively large diameter. d. is slower in the veins than in the capillaries because veins have a large diameter.
D
The warm-up period required of athletes in order to bring their muscles to peak performance is called a. Twitch b. Wave summation c. Incomplete tetanus d. Treppe
D
Vascular resistance is NOT affected by a. Arteriole lumen size b. Blood viscosity c. Total blood vessel length d. Venule vasoconstriction.
D
When a muscle fiber is stimulated by acetylcholine, ____ channels on the plasma membrane open. a. Ca++ b. Mg++ c. Cl- d. Na+
D
When the systemic mean arterial pressure is less than 60 mm Hg a. The brain is less sensitive to pH than to a decreased oxygen level b. Constriction of cerebral blood vessels occurs in response c. The pons initiates cerebral edema d. Syncope may follow
D
Which is NOT a possible result of chronic hypertension? a. Heart failure b. Renal failure c. Stroke d. Obesity. e. Vascular disease
D
Which is not possible result of chronic hypertension a. Heart failure b. Renal failure c. Stroke d. Obesity e. Vascular disease
D
Which of the following is characteristic of all leukocytes? a. They are phagocytic b. They are the most numerous of the formed elements in blood c. They have cytoplasmic granules d. They are nucleated
D
Which of the following might trigger erythropoiesis? a. an increased number of RBCs b. moving from a high altitude to a low altitude c. decreased tissue demand for oxygen d. increased tissue demand for oxygen
D
Which of the following wraps an entire muscle? a. perimysium b. fascicle c. endomysium d. epimysium
D
Which of the following wraps an entire muscle? a. perimysium b. fascicle c. endomysium d. Epimysium
D
Which returns fluid escaping from the circulatory system to the circulatory system a. Veins b. Arteries c. Capillaries d. Lymphatic vessels
D
You obtain a tube of blood from a patient. No anticoagulants are in the tube, so the blood clots. The tube is centrifuged and you remove the liquid from atop the clot and cells. The liquid thus obtained is called a. lymphatic fluid. b. plasma. c. whole blood. d. Serum.
D
