17) In a healthy human, which is regulated on a minute by minute basis to contro

Question

17) In a healthy human, which is regulated on a minute by minute basis to control Resistance?

a) arteriolar compliance             d. arteriolar radius

b) arteriolar length                       e. venous radius

c) blood viscosity

7) Circle ALL statements about cardiac action potentials (APs) that are FALSE.

a) they move across the atria rapidly, since local currents move between cells via gap junctions

b) they can have an extended depolarization phase, called the plateau phase

c) as seen in skeletal muscle, the shape of the APs across the heart are identical

d) the AP in the sinoatrial node are generated by pacemaker potentials

e) the AP in the atrioventricular node are generated by pacemaker cells

Explanation / Answer

17. In a healthy human, which is regulated on a minute basis to control resistance?

(e) venous radius

7. Cardiac action potential: ( false statements)

(c) as seen in skeletal muscle ,the shape of the APs across the heart are identical.

(d) the AP in the sinoatrial node are generated by pacemaker potentials.

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