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20 Cards in this Set

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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
a) directly proportional to the EDV
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
d) arterial blood pressure increase
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
c) colloid pressure is greater than plasma
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
e) all
Both ADH and aldosterone act to

a)increase urine volume b)increase blood volume c)increase total peripheral resistance d)all
b) increase blood volume
The greatest resistance to blood flow occurs in

a)large arteries b)med.-sized arteries c)arterioles d)capillaries
c) arterioles
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
a) increase by a factor of 16
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
c) turbulent flow of blood
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
d) products released by excercising mm
Blood flow in the coronary circulation

a)increase during systole b)increase during diastole c)remains constant throughout the cardiac cycle
b) increase during diastole
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
c) is maintained constant w/inphysiological limits
Which of these organs is able to tolerate the greatest reduction in blood flow

a)brain b)heart c)skeletal mm d)skin
d) skin
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
b)they are closed when ambient temp is very low
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
d) all
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
c)the same volume pumped by the rt ventrucle
Blood pressure is lowest in

a)arteries b)arterioles c)capillaries d)venules e)veins
e)veins
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
b) serve as baroreceptors that affect activity of the vagus and sympathetic nerves
Angiotension II

a)stims. vasoconstriction b)stims. the adrenal cortex to secrete aldosterone c)inhibits the action of bradykinin d)does all
d) does all
Which of these is a paracrine regulator that stims. vasoconstriction

a)nitric oxide b)prostacyclin c)bradykinin d)endothelin-1
d)endothelin-1
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
c)the difference btw diastolic and systolic pressures