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Flashcards in Physiology of Training Deck (21)
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1

A hearts inherent rhythm beat at about ___bpm

100

2

regulation of heart is controlled by

sinotrial node

3

parasympathetic tone

when the heart is primarily under the influence of the vague nerves (a decrease in tone can elevate the heart rate)

4

an increase in sympathetic activity leads to ___heart rate

increase in heart rate (opposite of parasympathetic)

5

Frank Starling Mecanism

a rise in cardiac contractility results in an increased amount of blood pumped perbeat

6

vasodilation

during exercise, vasodilation of skeletal muscle arteriole allows more blood into the tissue

7

autoregulation

the most important determinant in blood flow regulation to skeletal muscle during exercise

8

blood pressure during exercise is influneds by

nervouse and endocrine systems via alterations in the diameter of active muslce arterioles

9

systolic blood pressure

highes blood pressure attained ( more effected by excercise than DBP is)

10

diastole blood pressure

lowest blood pressure attained

11

percent of cardiace out put to the muscles during exercise

84%

12

transient hypertrophy

when weight lifting, fluid builds up in the active muscle (makes you look big)

13

ventilation is primarily controled by

neural and humoral influences

14

during submaximal exercise, ventilation increases __with oxygen consumption and CO2 production

linearly

15

tidal volume

the volume of air inhaled and exhaled per breath

16

ventilatory threshold

breathing rate really increases and does not depend on oxygen consumption but the over production of CO2 from anaerobic glycolisis

17

Catecholamines

hormones of the sympathetic nervous system and prepare and regulate the body cardiorespiratory function (fast acting hormone)

18

two main adrenal glands

adrenal medulla (releases epinephrine) and adrenal cortex (releases steriodal hormones)

19

under influence of epinephrine:

strength of cardiac contraction increases, vasodilation of skeletal muslce, dilates respiratory passages

20

Cortiosl

slow acting hormone, sitmulates mobilization from adipose tissue, high cortisol levels occur after long period of exercise

21

major food fuel of ATP

carbohydrates! they are also the only nutrient that can generate ATP anaerobically