The major ionic change that initiates the rising phase of the autorhythmic cell action potential is __________.

A. potassium ion exit
B. sodium ion entry
C. calcium ion entry
D. calcium ion exit


Ans: C. calcium ion entry

Anatomy & Physiology

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________ is an abnormal condition in which the urethra opens on the ventral surface of the penis

Fill in the blank(s) with correct word

Anatomy & Physiology

What type of aggression is displayed when an animal protects its owner?

a. dominance aggression c. fear aggression b. territorial aggression d. redirected aggression

Anatomy & Physiology

The patellar "knee jerk" reflex is an example of ________

A) a stress reflex B) an extensor thrust reflex C) a stretch reflex D) a crossed-extensor reflex

Anatomy & Physiology

The diaphragm creates a ________ section between the thoracic and abdominal body cavities

A) transverse (cross) B) median C) midsagittal D) frontal (coronal)

Anatomy & Physiology