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Flashcards in Test Two Deck (163)
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1

function of endocardium

serves as protective inner lining of the chambers and valves

2

during exercise, why is blood flow towards apex of lung

increase the pressure of the system

3

thick blood has a higher

hematocrit and higher resistance to flow

4

how does the heart receive blood supply

coronary arteries

5

where does capacitance occur

veins and venules

6

what is the respiratory zone

exchange of gases between air and blood

7

where is pressure located during diastolic pressure

arteries

8

expiration at exercise is

active

9

what does nitric oxide do

promotes smooth muscle relaxation which results in vasodilation and increased blood flow

10

when standing, why is most of the blood flow at the base of the lung

gravity

11

how do beta blockers work

compete with epinephrine and norepinephrine for beta andrenergic receptors in heart, reduce HR and contractility which lowers the myocardial oxygen demand

12

what happens to stroke volume during prolonged exercise

gradual decrease due to dehydration and reduced plasma volume

13

what are type 2 alveoli

release surfactant 3%

14

changes in HR and blood pressure during exercise depend on what

type, intensity, and duration of exercise., environmental condition, emotional influence

15

at rest, was part of the nervous system has more control over the heart

parasympathetic

16

what is total lung capacity

amount of gas in the lungs after a maximum inspiration

17

what is the most abundant protein in blood

albumin

18

what is the conducting zone

conducts air to respiratory zone, humidifies, warms and filters air

19

reasons for sudden cardiac death during exercise for kids and adolescents

genetic anomalies of coronary arteries, cardiomyopathy, myocarditis

20

what does cardiac output depend on

training state and gender

21

what happens to double product during incremental exercise

increases linearly with exercise intensity

22

what happens during expiration

diaphragm relaxes, ribs pulled downward, volume of lungs decrease, pressure increases and intrapulmonary pressure raised

23

what is the pressure like in the pulmonary circuit

lower but has same rate of flow as systemic circuit

24

muscles of inspiration

sternocleidomastoid, scalenes, intercostals,diaphragm

25

where is the site of gas exchange in the respiratory system

alveoli

26

beta blockers will lower HR during what type of exercise

submaximal and maximal

27

function of myocardium

provides muscular contractions that eject blood from the heart chambers

28

what are the determinants of MAP

cardiac output and total vascular resistance

29

how does exercise reduce amount of myocardial damage from heart attack

improvements in heart's antioxidant capacity, improve function of ATP-sensitive potassium channels

30

what is dyspnea

shortness of breath