Exam 3 Physiology

Which of the following is a function of plasma proteins? A) Plasma Proteins are responsible for the blood colloid osmotic pressure B) Antibodies are gamma globulins and are important in teh body's defense mechanism C) Plasma Proteins play a role in buffering changes in blood pH. D) The presence of plasma proteins in the blood is the primary factor responsible for preventing excessive loss of plasma from capillaries into the interstitial fluid. E) All of the above are functions of Plasma Proteins

All of the above are plasma protein functions.

Erythrocytes are synthesized in________due to the_____releasing_____.

Bone marrow: kidney:erythropoietin

what would not increase blood pressure?

Decreased total peripheral resistance

During the last step of the clotting cascade______which then transforms liquid blood into a gel.

Fibrinogen is converted to fibrin

What is hematocrit?

Hematocrit (he-MAT-uh-krit) is the proportion of your total blood volume that is composed of red blood cells

Resistance to blood flow increases when

Hematocrit increases.

What would decrease cardiac output?

Increasing parasympathetic activity to the SA node.

What would increase blood flow through a specific tissue?

Localized release of histamine.

Which of following leukocytes is the most numerous phagocyte in the blood?

Neutrophils

Hypertension most common blood pressure abnormality can lead to

Stroke,congestive heart failure, renal failure,renal damage.

Opening of which of the following channels contribute to the spontaneous depolarization of pacemaker cells?

T-type calcium channels

What is occurring during ventricular ejection?

The AV valves are closed and the semi lunar valves are open as blood is leaving the ventricles.

Which of the following is false of sympathetic activity to the SA node? A) Norepinephrine binds to beta adrenergic receptors. B) T-type calcium channel opening is enhanced C) Funny channel opening is enhanced D) The rate of spontaneous depolarization is increased. E) L-type calcium channel opening is decreased.

The L-type calcium channel opening is decreased.

What could lead to edema?

a fall in concentration of plasma proteins and blocked lymph vessels .

Which of the following blood vessels act as pressure reservoirs?

arteries

Blood vessels surface area is greatest in the_____and lowest in the______.

capillaries:arteries

The opening and closure of the atrioventricular and semilunar valves is due to:

differences in pressure across the valves.

At the beginning of a capillary bed the hydrostatic pressure of the interstitial fluid is _____ than the hydrostatic pressure of the plasma leading to net ______ while at the end of a capillary be the osmotic pressure of the plasma is _____ than the osmotic pressure of the interstitial fluid leading to net _____ .

less: filtration : greater : absorption

The pressure measured in arteries while the ventricles are contracting is:

systolic

Which of the following blood vessels have the largest radius?

veins

Platelets become sticky when they are exposed to what?

von Willabrand factor attached to exposed collagen.