Physiology Of Blood Flow And Pressure

Front 1

According to Frank-Sterling Law of the Heart, the strength of venticular contraction is

a)directly proportional to the end-diastolic volume b)inversely proportional to the end-diastolic volume c)independent of the end-diastolic volume

Back 1

a) directly proportional to the EDV

Front 2

In the absence of compensations, the stroke volume will decrease when

a)blood volume increase b)venous return increases c)contractility increase d)arterial blood pressure increases

Back 2

d) arterial blood pressure increase

Front 3

Which statement about tissue fluid is false

a)it contains the same glucose and salt concentration as plasma b)it contains a lower protein concentration then plasma c)its colloid osmotic pressure is greater than plasma d)its hydrostatic pressure is lower than plasma

Back 3

c) colloid pressure is greater than plasma

Front 4

Edema may be caused by

a)high blood pressure b)decreased plasma protein c)leakage of plasma protein into tissue fluid d)blockage of lymphatic vessels e)all

Back 4

e) all

Front 5

Both ADH and aldosterone act to

a)increase urine volume b)increase blood volume c)increase total peripheral resistance d)all

Back 5

b) increase blood volume

Front 6

The greatest resistance to blood flow occurs in

a)large arteries b)med.-sized arteries c)arterioles d)capillaries

Back 6

c) arterioles

Front 7

If a vessel were to dialate to twice its previous radius, and if pressure remained constant, blood flow thru this vessel would

a)increase by a factor of 16 b)increase by a factor of 4 c)increase by a factor of 2 d)decrease by a factor of 2

Back 7

a) increase by a factor of 16

Front 8

The sounds of Korotkoff are produced by

a)a closing of the semilunar valves b)closing of the AV valves c)the turbulent flow of blood d)elastic recoil of the aorta

Back 8

c) turbulent flow of blood

Front 9

Vasodialation in th eheart and skeletal mm during excercise is primarily due to the effects

a)alpha-adrenergic stim. b)beta-adrenergic stim. c)cholinergic stim. d)products released by excercising mm

Back 9

d) products released by excercising mm

Front 10

Blood flow in the coronary circulation

a)increase during systole b)increase during diastole c)remains constant throughout the cardiac cycle

Back 10

b) increase during diastole

Front 11

Blood flow in the cerebral circulation

a)varies w/ systemic arterial pressure b)is regulated primarily by the sympathetic system c)is maintained constant within physiological limitations d)increases during excersice

Back 11

c) is maintained constant w/inphysiological limits

Front 12

Which of these organs is able to tolerate the greatest reduction in blood flow

a)brain b)heart c)skeletal mm d)skin

Back 12

d) skin

Front 13

Which of the following about atriovenous shunts in the skin is true

a)They divert blood to superficial capillary loops b)they are closed when the ambient temp is very low c)they are closed when the deep -body temp rises much above 37 C d)all

Back 13

b)they are closed when ambient temp is very low

Front 14

An increase in blood volume will cause

a)a decrease in ADH secretion b)an increase in Na+ excretion in urine c)a decrese in renin secretion d) all

Back 14

d) all

Front 15

The volume of blood pumped per minute by the left ventricle is

a)grter than the volume pumped by the right ventricle b)less than the vol. pumped by the right ventricle c)same as the vol. pumped by th eright ventricle d)either less or grter than the vol. pumped by rt ventricle depending on the strength of the contraction

Back 15

c)the same volume pumped by the rt ventrucle

Front 16

Blood pressure is lowest in

a)arteries b)arterioles c)capillaries d)venules e)veins

Back 16

e)veins

Front 17

Stretch receptors in the aortic arch and carotid sinus

a)stim. secretion of atrial natriuretic peptic b)serve as baroreceptors that affect activity of the vagus and sympathetic nerves c)serve as osmoreceptors that stim. the release of ADH d)stim. renin secretion, thus increasing angiotension II fromation

Back 17

b) serve as baroreceptors that affect activity of the vagus and sympathetic nerves

Front 18

Angiotension II

a)stims. vasoconstriction b)stims. the adrenal cortex to secrete aldosterone c)inhibits the action of bradykinin d)does all

Back 18

d) does all

Front 19

Which of these is a paracrine regulator that stims. vasoconstriction

a)nitric oxide b)prostacyclin c)bradykinin d)endothelin-1

Back 19

d)endothelin-1

Front 20

The pulse pressure is the measure of the

a)number of heartbeats per min. b)sum of siastolic and systolic pressures c)difference btw the diastolic and systolic pressures d)diff. btw. arterial and venous pressures

Back 20

c)the difference btw diastolic and systolic pressures