Physiology of Training

Question 1

A hearts inherent rhythm beat at about ___bpm

Answer 1

100

Question 2

regulation of heart is controlled by

Answer 2

sinotrial node

Question 3

parasympathetic tone

Answer 3

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

Question 4

an increase in sympathetic activity leads to ___heart rate

Answer 4

increase in heart rate (opposite of parasympathetic)

Question 5

Frank Starling Mecanism

Answer 5

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

Question 6

vasodilation

Answer 6

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

Question 7

autoregulation

Answer 7

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

Question 8

blood pressure during exercise is influneds by

Answer 8

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

Question 9

systolic blood pressure

Answer 9

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

Question 10

diastole blood pressure

Answer 10

lowest blood pressure attained

Question 11

percent of cardiace out put to the muscles during exercise

Answer 11

84%

Question 12

transient hypertrophy

Answer 12

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

Question 13

ventilation is primarily controled by

Answer 13

neural and humoral influences

Question 14

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

Answer 14

linearly

Question 15

tidal volume

Answer 15

the volume of air inhaled and exhaled per breath

Question 16

ventilatory threshold

Answer 16

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

Question 17

Catecholamines

Answer 17

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

Question 18

two main adrenal glands

Answer 18

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

Question 19

under influence of epinephrine:

Answer 19

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

Question 20

Cortiosl

Answer 20

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

Question 21

major food fuel of ATP

Answer 21

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