Wgich occurs earlier in a progressive step test(i.e., at lower exercise intensit

Question

Wgich occurs earlier in a progressive step test(i.e., at lower exercise intensity)

A.The exercise intensity at which the blood lactate concentration begins to increase exponentially

B.The exercise intensity at VO2max

C.They occur at the same exercise intensity

2. Which of the following will lower someone's blood pressure

A. Increased cardiac output

B. Vasocontriction

C.Both

D.Neither

7.Which of the following controls arteriole size?

A.Sympathetic nervous system

B.Local metabolic factors

C.Both

D. Neither

8.Rate pressure product is:

A.Equal to heart multiplied by sytolic blood pressure

B. An index of myocardial oxygen demand

C. Both

D. neither

9.Which units for VO2 max have the smaleest gender gap?

A.L/min

B.ml/kg/min

C.ml/(kg fat-free mass)/min

Explanation / Answer

1. VO2 max states the ability of body to transport and utilise O2, with changes in ventilation, perfusion, heart rate and stroke volume, and peripheral utilisation of O2.

aerobic capacity can be measured by VO2 max .

The maxVO2 is reached when  post-exercise blood lactate exceeds 8 to 10mM.

So the answer is( A.)The exercise intensity at which the blood lactate concentration begins to increase exponentially

2. Neither of the two wiil decrease the blood pressure

Systolic pressure is directly proportional to cardiac
output. Whenever the cardiac output increases, the
systolic pressure is increased and when cardiac output
decreases, the systolic pressure decreases

Blood pressure is inversely proportional to the
diameter of blood vessel. If the blood vessel constricts, the
peripheral resistance increases, leading to increase in
the pressure..

so the answer is (D)

7. the arteriole size is affected by the sympathetic activity

the sympathetic stimulation leads to vasoconstriction of arterioles.

so the answer is (A) sympathetic nervous system

8. hear rate product states the myocardial oxygen demand

it is also called as cardiovascular product.

rate pressure product can be calculated as heart rate multiplied by systolic blood pressure

so the answer is (C) both

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