chap 15 p.2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 5 blood vessel types in human body | arteries, arterolies,capillaries,venules, veins
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| blood vessle type that carries blood back to heart | vein
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| blood ves. type that carries blood to cap. | arterioles
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| bl. ves. type carries blood away from heart | arteries
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| blood ves. where gases are exchanged with bodys tissues | capillaries
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| blood ves. type that capillaries empty into | venules
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| blood in arterties | 02
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| blood arterioles | 02
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| blood in venules | CO2
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| blood in veins | CO2
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| capillaries blood | CO2 and 02
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| largest blo. ves in diameter | vein
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| largest artery | aorta artery
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| two tissue types found in walls of artery | smooth muscle and elstic tissue
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| describe blood pressure in arteries vs. veins | arteris have low blood pressure
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| walls of capillaries | sinusoids(leaky)
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| what function of precapillary sphincters? where are they located | junction b/t capillaries and arterioles; control blood flow to capillaries
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| what type of enviroment within the tissue will cause precap. to open/ close | low oxygen and nutrients to open; high amts to close
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| venuous valves located | arms and legs
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| function of venuous valves | prevent blood from falling backwards
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| why are venuous valves needed? | bc there are low b.p in veins and also gravitational pull of arms and legs
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| blood vol. of veins | 60-70
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| cap. blood vol | 5
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| systemic arteries blood vol. | 10-12
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| blood pressure means | force against inner walls of Blood vessles
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| blood pressure avg. adult | 120/80
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| distolic | min presure
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| systolic | max pressure
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| why dont we take b.p from our veins | low pressure
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| what artery is used to for blood pressure | brachial
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| 4 pressure points take pules | temporal, brachial, facial, radial
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| stroke volume | amt of blood pumped per heart beat
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| blood viscosity | blood thickness
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| peripheral resistance | blood ves. are stretched
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| blood vol. | amt of blood in body
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| heart rate | beats per min
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| baroreceptors located | arteries
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| function of baroreceptors | dectect b.p changes in arteries
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| 3 pumps produce circulation in body | 1. heart2. respitory3.skeletal
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| res. pump function | abdominals contract which sends blood back up
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| skeletal muscle pump function | contraction of skeletal muclse squeeze blood back to heart
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| 4 life span changes within cardiovascular system | 1. heart enlargement2.death of cardiac muscle3. increase in adipose tissue of heart4. incrase in B.P
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| why is the loss of cardiac cells thought of as irreversable | cells dont regenerate
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| why does our heart enlarge as we get to old age | chordae tendone stretches and are loosen
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| why does our heart rate decrease with old age | due to weight loss
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| four chambers and valves found in the heart | R-al-ar-vl-vl-a-v , r-a-v, pul, and aortia
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