The rapidly depolarizing cells, called pacemaker cells, are found in the ________, which is embedded in the posterior wall of the right atrium.
A) right bundle branch
B) AV node
C) left bundle branch
D) intermodal pathways
E) SA node
Ans: E) SA node
Anatomy & Physiology
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Two terms that both refer to internal organs are
A) sympathetic and parasympathetic. B) viscera and somatic. C) splanchnic and ganglionic. D) splanchnic and viscera. E) somatic and preganglionic.
Anatomy & Physiology
The gaps between Schwann cells found at regular intervals in peripheral system neurons are called ________
A) synaptic clefts B) axon terminals C) nodes of Ranvier D) myelin sheaths
Anatomy & Physiology
The primary function of the antidiuretic hormone (ADH) is:
A. increased renal output of urine. B. facilitation of water excretion. C. promotion of water retention.
Anatomy & Physiology
The heart is enclosed in the ________.
Fill in the blank(s) with the appropriate word(s).
Anatomy & Physiology