Question 2 Blood pH is normally (optimally) at _____. A. 7.0 B. 8.0 C. 7.8 D. 7.

Question

Question 2

Blood pH is normally (optimally) at _____.

A.

7.0   

B.

8.0   

C.

7.8

D.

7.1

E.

None of the Above

Question 6

An agent that reduces skeletal muscle blood flow during incremental exercise would

A.

Reduce VO2peak

B.

Increase preload

C.

Increase cardiac output

D.

All of the above

Question 7

In regards to muscle action, ATP is necessary... (select all that apply)

A.

for actin and myosin to return to a weak binding state

B.

in order to cock the myosin head

C.

for actin binding sites to become fully accesible to myosin heads

D.

for muscle to relax

Question 12

A tumor of the adrenal medulla that produces medullary hormones would

A.

Cause elevated heart rate and blood pressure

B.

Severe weight gain

C.

Both of the above

D.

None of the above

Question 15

A strong actin-myosin binding occurs when ___?___.

A.

ATP is released from the troponin molecule at the binding site

B.

calcium binds to troponin, which causes tropomyosin to move away from the actin binding site and thereby exposing the actin binding site

C.

ATP attaches to myosin

D.

ATP is in a position that blocks the actin binding site

E.

calcium is removed from troponin which causes the actin binding site to be exposed

A.

7.0   

B.

8.0   

C.

7.8

D.

7.1

E.

None of the Above

Explanation / Answer

2) E. None of the above

Because the blood pH is fegulated beetween 7.35 to 7.45.

6) An aent that reduces skeletal muscle blood flow duing incremental exercise would

A. Reduce VO2 peak

7) In regards muscle actions ATP is necessary

B. In order to cock the myosin head

12) A tumor of the adrenal medulla that produces medullary hormones would

B. Severe weight gain

15) A strong actin myosin binding occurs when

B. Calcium binds to troponin which causes tropomyosin to move away from the actin binding site and thereby exposing the actin binding site

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