Exercise

Question 1

Relative workload is measured as

Answer 1

% of max workload

Question 2

What is max workload?

Answer 2

Smalled workload that cause the person to reach their max oxygen consumption

Question 3

What is frequency of exercise rec by surgeon general?

Answer 3

150

Question 4

With increased energy demand, how does the body get the ATP?

Answer 4

• Glycolysis (anaerobic breakdown)
• Aerobic metabolism (17 ATP via TCA and ET)

Question 5

In moderate exercise, ATP demand is met by

Answer 5

mitochondria

Question 6

In moderate exercise, pyruvate obstained by

Answer 6

breakdown of stored glycogen

Question 7

Peak activity, excess pyruvate is converted to

Answer 7

lactic acid - breaks down to lactate and H–> lower pH –> fatigue

Question 8

As workload rises, what happens to oxygen consumption?

Answer 8

It rises

Question 9

If workload excessds the workload that produces the max oxygen consumption, what will occur?

Answer 9

Oxygen deficit throughout exercise

Question 10

What is the best measure of aerobic fitness?

Answer 10

Max oxygen consumption

Question 11

What are factors that influence max oxygen consumption?

Answer 11

• Sex
• State of training
• Age
• Unknown genetic factors
• Body size and composition
• Mode of exercise

Question 12

Oxygen consumption is determined by

Answer 12

cardiac outpus and oxygen extraction

Question 13

Why does MAP increase during exercise?

Answer 13

Because CO increases proportionately more than does than TPR decrease

Question 14

During exercise, what happens to systolic and diastolic pressure?

Answer 14

• Systolic increases
• Diastolic decreases

Question 15

Increase in HR is produced by

Answer 15

increase in symp activity, decrease in para and increase in catecholamines

Question 16

Increased stroke volume is caused by

Answer 16

• Increase in ventricular contractility
• Increase in EDV

Question 17

What does not change during exercise?

Answer 17

Amount of O2 in arterial blood

Question 18

What happens to TPR during exercise?

Answer 18

It decreases

Question 19

Arterioles perfusing the working muscles are dilated by

Answer 19

the metabolic byproducts that accumulate during exercise

Question 20

The heart metabolizes

Answer 20

aerobically

Question 21

What happens to cutenous blood vessels during exercise?

Answer 21

They dilate and increase blood floq

Question 22

Increased cutanoeus blood flow contributes to

Answer 22

dissipation of heat from the exercising muscles

Question 23

Symp nerves that inncervate systemic venous vessels cause the vascular smooth m in veins to

Answer 23

contract and shift bld volume out of veins into heart and arteries

Question 24

Blood plasma volume decreases during

Answer 24

aerobic exercise

Question 25

Increaed BP and changes in intramuscular osmotic pressures includes

Answer 25

- Increased capillary filtration - Increased capillary hydrostatic pressure - Increased tissue osmolarity

Question 26

Resp centers in the brain stem are influenced by

Answer 26

chemoreceptors in carotid bodies and aortic arch

Question 27

Resp stimulation is most sensitive to

Answer 27

PCO2

Question 28

Trained person has a greater contractility during exercise, therefore

Answer 28

- Increased Ca release - Increased EF

Question 29

Trained person will have greater blood vlume, which means they have increased

Answer 29

- plasma vol - Plasma proteins - RBCs - BUT decreased hematocrit