Which of the following terms indicates a nerve impulse has been initiated and is being transmitted?

A) graded potential
B) action potential
C) repolarization
D) local depolarization
E) depolarization


B

Anatomy & Physiology

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The placenta, a vitally important metabolic organ, is made up of a contribution from mother and fetus. Which portion is from the fetus?

A) yolk sac B) umbilicus C) chorion D) amnion

Anatomy & Physiology

Whole muscle tension depends on all of the following except

a. number of muscle fibers contracting b. tension produced by each contracting fiber c. extent of motor-unit recruitment d. frequency of stimulation e. the proportion of each motor unit used at any given time

Anatomy & Physiology

Which extraembryonic membrane appears first?

A) chorion B) yolk sac C) allantois D) amnion

Anatomy & Physiology

Spinal nerves are designated by the location and numerical position on the spine.

a. true b. false

Anatomy & Physiology