Exam 3 - Homework Quiz 5 - Cardiovascular

An increase in blood viscosity will cause an increase in peripheral resistance. (a) True (b) False

(a) True

The adjustment of blood flow to each tissue in proportion to its requirements at any point in time is termed autoregulation and is controlled by the ANS. (a) True (b) False

(a) True

The blood in the pulmonary circulation does not directly exchange with the tissues to serve the metabolic needs of body tissues. (a) True (b) False

(a) True

The carotid sinus baroreceptor reflex protects the blood supply to the brain, whereas the aortic reflex is more concerned with maintaining adequate blood pressure in the systemic circuit as a whole. (a) True (b) False

(a) True

The heart sounds (lub and dub) are the sounds of the valves in the heart closing in sequence. (a) True (b) False

(a) True

The lymphatic capillaries function to absorb the excess protein-containing interstitial fluid and return it to the bloodstream. (a) True (b) False

(a) True

Blood flow to the skin ________. (a) increases when environmental temperature rises (b) is not an important source of nutrients and oxygen for skin cells (c) increases when body temperature drops so that the skin does not freeze (d) is controlled mainly by decreasing pH

(a) increases when environmental temperature rises

Death of heart muscle cells. (a) myocardial Infarction (b) myocardial Ischemia (c) Fibrillation (d) Arrhythmia

(a) myocardial Infarction

If blood pressure is almost normal in a person who has lost blood, does that mean the tissues are receiving adequate blood flow? (a) not necessarily (b) no (c) yes

(a) not necessarily There are many factors that can affect and explain their conditions

The pulse pressure is ________. (a) systolic pressure minus diastolic pressure (b) systolic pressure plus diastolic pressure (c) systolic pressure divided by diastolic pressure (d) diastolic pressure plus 1/3 (systolic pressure plus diastolic pressure)

(a) systolic pressure minus diastolic pressure

Arterial pressure in the pulmonary circulation is much higher than in the systemic circulation because of its proximity to the heart. (a) True (b) False

(b) False ...

An ECG provides direct information about valve function. (a) True (b) False

(b) False There are many function provided by ECG and it is up to the care provider to interpret the graphs and data

Vasodilation is a widening of the lumen due to smooth muscle contraction. (a) True (b) False

(b) False the dilatation (widening) of blood vessels, which decreases blood pressure. Not the lumen

Heart muscle is deprived of oxygen. (a) Infraction (b) Ischemia (c) Fibrillation (d) Arrhythmia

(b) Ischemia

Atrio-Ventricular valve with two flaps: (a) Tricuspid valve (b) Mitral valve (c) Aortic valve (d) Pulmonary valves

(b) Mitral valve The Mitral valve is also known as the "Bicuspid" valve, hence the two flaps

The fact that the left ventricle of the heart is thicker than the right ventricle reveals that it ________. (a) sends blood through a smaller valve (b) pumps blood against a greater resistance (c) pumps a greater volume of blood (d) expands the thoracic cage

(b) pumps blood against a greater resistance

Which of the following is not part of the autorhythmic conduction system of the heart? (a) AV node (b) bundle branches (c) AV valve (d) SA node

(c) AV valve The SA and AV nodes send the signals for the rhythmic conduction to the bundle branches. The AV value just opens due to pressure

Site where the blood volume is greatest. (a) Capillaries (b) Large arteries NOT (c) Arterioles (d) Large veins

(c) Arterioles

Select the correct statement about blood flow. (a) It is relatively constant through all body organs. (b) It is measured in mm Hg. (c) Blood flow through the entire vascular system is equivalent to cardiac output. (d) It is greatest where resistance is highest.

(c) Blood flow through the entire vascular system is equivalent to cardiac output ...

Artery usually palpated to take the blood pressure. (a) Great saphenous vein (b) Pulmonary vein (c) Brachial artery (d) Femoral artery (e) Superior mesenteric artery

(c) Brachial artery ...

Site where exchanges of food and gases are made. (a) Arterioles (b) Large veins (c) Capillaries (d) Large arteries

(c) Capillaries

Which of the following is true about veins? (a) Veins have a small lumen in relation to the thickness of the vessel wall. (b) Up to 35% of total body blood is in venous circulation at any given time. (c) Veins are called high-compliance vessels or blood reservoirs. (d) Venous valves are formed from the tunica media.

(c) Veins are called high-compliance vessels or blood reservoirs ...

Permitting the exchange of nutrients and gases between the blood and tissue cells is the primary function of ________. (a) arteries (b) arterioles (c) capillaries (d) veins

(c) capillaries

Blood within the pulmonary veins returns to the ________. (a) left ventricle (b) right ventricle (c) left atrium (d) right atrium

(c) left atrium

Site where the velocity of blood flow is slowest. (a) Arterioles (b) Large veins (c) Large arteries (d) Capillaries

(d) Capillaries ...

Atrio-Ventricular valve with three flaps. (a) Mitral valve (b) Aortic valve (c) Pulmonary valves (d) Tricuspid valve

(d) Tricuspid valve

Small muscle masses attached to the chordae tendineae are the ________. (a) trabeculae carneae (b) venae cavae (c) pectinate muscles (d) papillary muscles

(d) papillary muscles These help to keep the chordae tendineae suspended, so that they may help with contraction in pressure changes

Which of the following do not influence arterial pulse rate? (a) postural changes (b) emotions (c) activity (d) the vessel selected to palpate

(d) the vessel selected to palpate ...

Fenestrated capillaries ________. (a) do not occur in the glomerular capillaries of the kidneys (b) are not found in the brain (c) are not common in endocrine organs and in areas where capillary absorption is an important function (d) are not more permeable than continuous capillaries NOT

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