Question 45 During concentric muscular contractions... A. Force increases as con

Question

Question 45

During concentric muscular contractions...

A.

Force increases as contractile velocity increases due to a faster cycling rate of myosin

B.

Force increases as contractile velocity increases due to the elastic properties of muscle tissue

C.

Force decreases as contractile velocity increases due to the buildup of lactic acid

D.

Force decreases as contractile velocity increases due to the increased cycling rate of myosin

Question 50

Systole is the portion of the cardiac cycle where ____.

A.

ventricular pressure would be the lowest

B.

a P wave would be shown at the same time on the EKG

C.

blood is expelled from the ventricles into the pulmonary artery and aorta

D.

ventricular filling occurs

E.

both A and D are correct

Question 51

The principle site of glucose disposal during moderate to vigorous intensity exercise is

A.

The brain

B.

The heart

C.

Skeletal muscle

D.

Adipose tissue

Question 54

1.       ADH production in the pituitary would –

A.

Increase cardiac output by reducing afterload

B.

Reduce cardiac output by increasing afterload

C.

Increase preload and increase BP

D.

None of the above

Question 56

A drug that blocks mitochondrial biogenesis associated with exercise training would affect which aspect of the Fick equation during incremental exercise

A.

Arterio-venous oxygen difference

B.

Cardiac output

C.

All of the above

A.

Force increases as contractile velocity increases due to a faster cycling rate of myosin

B.

Force increases as contractile velocity increases due to the elastic properties of muscle tissue

C.

Force decreases as contractile velocity increases due to the buildup of lactic acid

D.

Force decreases as contractile velocity increases due to the increased cycling rate of myosin

Explanation / Answer

45- c,force decreases as contraction velocity increase

50-c,blood is expelled from ventricles

51-skeletal muscle

54-b,reduce cardiac output by increasing after load

56-a-AV oxygen difference

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