The brachial plexus gives rise to all of the following nerves except the

A) radial.
B) median.
C) ulnar.
D) musculocutaneous.
E) phrenic.


Answer: E

Anatomy & Physiology

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Which of the following statements concerning potassium ions is false?

A. An increase in the extracellular potassium ion concentration leads to depolarization. B. Potassium ions are secreted into the nephron by the distal convoluted tubule. C. When aldosterone levels are high, potassium secretion is low. D. Aldosterone secretion is stimulated by high blood levels of potassium ions. E. None of these choices is false.

Anatomy & Physiology

Ion channels that open or close based on changes in the membrane potential are called

A) Voltage-gated channels. B) Ligand-gated channels. C) Mechanogated channels. D) Porins.

Anatomy & Physiology

Epinephrine

a. is secreted by the adrenal medulla b. is secreted along with norepinephrine c. reinforces sympathetic nervous system activity d. mobilizes energy reserves e. has all of the above characteristics

Anatomy & Physiology

________ ions help to regulate the pH of saliva.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology