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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The heart is enclosed in the ________.
Fill in the blank(s) with the appropriate word(s).
Anatomy & Physiology
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