The main pacemaker of the heart is the _______.

A. AV node
B. SA node
C. bundle of his
D. purkinje node


Answer: B. SA node

Anatomy & Physiology

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Low levels of adrenal cortex hormones result in __________.

A) Addison disease B) Cushing syndrome C) diabetes D) tetany E) goiter

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Which type of receptor responds to deep pressure and vibrations?

A) Pacinian B) Meissner's corpuscles C) Ruffini corpuscles D) Merkel cells

Anatomy & Physiology

At equilibrium there is movement of molecules in all directions, but the concentrations of the particles is the same at all points.

a. true b. false

Anatomy & Physiology