blood vessels
false regarding EDEMA a) it is another term for hemorrhaging b) it is an abnormal increase in interstitial fluid c) it occurs if blood hydrostatic pressure increases d) it is when capillary reabsorption rate declines
a
false regarding arterial blood pressure a) it is constant throughout the cardiac cycle b) it is pulsatile c) highest arterial pressure is during ventricular systole d) none of the above - all true
a
vasodilation is a a) increase in the size of the lumen b) decrease in the size of the lumen c) constriction of the tunica media d) relaxation of the tunica adventitia e) more than one of these is correct
a
a force that opposes any movement, such as blood flow
a force that opposes any movement, such as blood flow
hormone that promotes vasoconstriction - norepinephrine - ADH - angiotensin 2 - all of the aboce
all of the above
which kind of artery feeds the capillary beds - elastic - muscular - distributing -arterioles - continuous
arterioles
The baroreceptors in the carotid and aortic bodies are sensitive to a) a decrease in carbon dioxide b) changes in arterial pressure c) a decrease in oxygen d) all of these
b
pulse pressure a) is the same as mean arterial pressure b) is the difference between systolic and diastolic pressure c) is the peak blood pressure during ventricular systole d) none
b
when the heart pumps, ventricular blood is pumped into the arteries. what happens next? a) the veins collapse as the ventricle refill b) the arteries maintain flow via elastic rebound c) hydrostatic pressure in the capillaries increases d) none
b
which of the following does not stimulate the cardioaceleratory centers of the brain a) decreased oxygen levels in teh arterial blood b) decreased carbon dioxide levels in the arterial blood c) atrial blood pressure drops below normal range d) decrease in the pH of the arterial blood
b
the volume of blood flowing per unit time
blood flow
hydrostatic pressure in the arterial system
blood pressure
FALSE regarding capillaries a) endothelium only b) only vessle engaged in chemical exchange c) they merge into larger vessles called arterioles d) narrowest vessle e) they lack a smooth muscle layer in their wall
c
blood flow through the capillaries is due to a) pressure exerted by the ventricles of the heart b) peripheral resistance in the arterioles c) a huge pressure gradient between arterioles and venules d) magic
c
true regarding the aortic reflex a) depends on the pH of the blood b) a decrease in blood pressure causes an increase in AP to the vasomotor area c) an increases in stretch of the aorta causes an increase in vasodialation d) none
c
which statement best describes arteries a) take oxygenated blood away from the heart b) take deoxygenated blood away from the heart c) take blood away from the hart d) take blood towards the heart e) all of the above
c
TRUE regarding mean arterial pressure a) syncope occurs if MAP falls below 60 mmHg b) it is used to report a single blood pressure value c) it is normally found between 95 and 100 mmHg d) all of the above
d
Which statement doesn't accurately describe veins? a) They have less elastic tissue and smooth muscle than arteries. b) They contain more fibrous tissue than arteries. c) Most veins in the extremities have valves. d) They always carry deoxygenated blood.
d
false about veins a) they have large lumens b) they carry blood towards the heart c) they are low pressure vessles d) they always carry deoxygenated blood e) they have a thick tunica adventita
d
false regarding pressure. pressure is a) the force that mass exerts on its surroundings b) inversely porportional to the volume of the container c) measured in millimeters of mercury d) none of the above - all true
d
not a means by which blood flow is maintained in the veins a) changes in pressure within the thorax during respiration b) normal skeletal muscle contraction c) venous valves d) ventricular systole
d
where do we find baroreceptors a) the walls of the carotid sinuses b) the walls of the ascending aorta c) the walls of the right atrium d) all of the above
d
which of the following associations regarding capillaries is FALSE a) continuous = most common type b) fenestrated = found in areas of high filtration/absorbtion c) sinusoidal = exhibit loose tight junctions, to allow large molecules to pass through d) none - all are true
d
while taking someone's blood pressure using the ausculatory method: a) you are listening for the sounds of kortokoff b) you are listening to blood passing through the vessels c) you are using a sphygmomanometer d) all of the above
d
Which of the following can lead to decreased venous return of blood to the heart? a) an increase in blood volume b) an increase in venous pressure c) damage to the venous valves d) increased muscular activity
damage to the venous valves
which kind artery is found closest to the heart - elastic - muscular - distributing -arterioles - continuous
elastic
epithelial lining of the cardiovascular system - endocardium - endothelium - myocardium - endometrium - none
endothelium
not part of a capillary bed - gap junction - vascular shunt - pre-capillary sphincter -true capillaries - none
gap junction
true about blood flow and pressure in the veins a) there are 2 pressures in the veins: systole and diastole b) blood pressure is approximately 0 mmHg by the time it gets to the atrium c) blood flow in veins is mostly due to ventricular contraction d) blood flows from the veins to the venules
n
a lowered sympathetic nervous output as a person ages may lead to - acute hypotension - orthostatic hypotension - acute hypertension - chronic hypertension
orthostatic hypotension
Which of the following tissues is mainly responsible for vasoconstriction a) elastic tissue b) smooth muscle c) collagenic tissue d) adipose tissue
smooth muscle
In atheroschlerosis, which layer of the vessel wall thickens most? a) tunica media b) tunica interna c) tunica adventitia d) tunica externa
tunica intima
which is known as the "diffusion layer" - tunica intima - tunica media - tunica adventitia - lumen
tunica intima
which is known as the "regulation layer" - tunica intima - tunica media - tunica adventitia - lumen
tunica media
resistance to the flow due to interactions of molecules in a liquid
viscosity