The following are structural components of the conducting system of the heart. 1. Purkinje fibers 2. AV bundle 3. AV node 4. SA node 5. bundle branches The sequence in which excitation would move through this system is
A) 1, 4, 3, 2, 5.
B) 3, 2, 4, 5, 1.
C) 3, 5, 4, 2, 1.
D) 4, 3, 2, 5, 1.
E) 4, 2, 3, 5, 1.
D
Anatomy & Physiology
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Indicate whether the statement is true or false.
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Most gray matter of the cerebrum is located in which region?
A) Substantia nigra B) Limbic system C) Reticular formation D) Neocortex E) Basal nuclei
Anatomy & Physiology
Saltatory conduction of a nerve impulse occurs only along myelinated axons.
Answer the following statement true (T) or false (F)
Anatomy & Physiology
An enzyme that joins two substrates using energy is a
A) transferase. B) lipase. C) ligase. D) kinase. E) hydrolase.
Anatomy & Physiology