Chapter 8: components of CV system and blood flow patterns Flashcards Preview

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Flashcards in Chapter 8: components of CV system and blood flow patterns Deck (21):
1

high sympathetic tone

increased norepinephrine release therefor elevating the heart rate

2

if we enter a period of high parasympathetic tone

rest and digest
there will be an increase in acetylcholine

3

acetycholine

slows the heart rate

4

can the heart beat without specific neurotransmitter and nervous intervention?

yes ; without direct nervous intervation for example you severed your spinal cord your heart rate will stay at about 90 bpm , you can live you just cannot change your heart rate

5

perfusion

flow of blood through a group of cells

6

the blood is shunted toward the kidneys in which type of autonomic tone?

parasympathetic tone
rest and digest

7

an adult human has how many miles of blood vessels?

60,000 miles of blood vessels

8

hemotherm

warm blooded creature
-manage their body temp reguardless of the outside temp
-humans and birds

9

before birth we see some mixing of blood via

fetal shunts

10

what would happen if the right side of the heart created as much pressure as the left side of the heart?

-you would have problems in the lungs
-lung tissue is really delicate so if you had more blood pressure then it would rupture the capillaries and get blood around the alveoli and create pulmonary edema

11

bulk flow

rapid flow in one direction
-mass movement of nutrients and oxygen
-allows cells to be adequately fed

12

together what three components feed the body and remove waste?

heart, vessels, blood

13

what are the constant changes the CV system must facilitate due to the dynamic needs of the body in real time?

change in body temp
change in locomotion
change in autonomic tone

14

heart

muscular pump designed to keep oxygenated and deoxygenated blood separate and creates different pressures

15

blood vessels

facilitates different pressures and cellular needs

16

blood

medium that facilitates bulk flow (rapid flow in one direction)

17

lymph vessels

a method for collecting extra fluid pushed out of the blood that has collected around the cells to prevent edema

18

basic flow of blood

deoxygenated blood returns to the right side of heart
-goes to the lungs for gas exchange
-oxygenated blood returns to left side of heart
-distributed to body cells
-diffusion to and from cells
-returns to right side of heart

19

where is pressure generated?

in both ventricles

20

where is resistance generated?

all of the vessels

21

failing CV system deprives the cells of ______ and causes the accumulation of _______ which leads to a disruption in _______ and eventually _______.

oxygen
wastes (CO2, urea, heat)
conc. gradients
cell death