What is the correct sequential path of a normal action potential in the heart?
a. SA node, AV node, bundle branches, AV bundle, Purkinje fibers
b. SA node, AV node, bundle of His, bundle branches, Purkinje fibers
c. SA node, AV bundle, AV node, Purkinje fibers
d. AV node, SA node, AV bundle, bundle of His
Answer: b. SA node, AV node, bundle of His, bundle branches, Purkinje fibers
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Place the following in correct sequence from simplest to most complex:
1. molecules 2. atoms 3. tissues 4. cells 5. organs A) 1-2-4-3-5 B) 2-1-4-3-5 C) 1-2-3-4-5 D) 2-1-3-4-5
Anterograde amnesia is associated with damage to all of the following structures of the brain, except
A. thalamus. B. hypothalamus. C. limbic system. D. corpus callosum. E. hippocampus.
After initial entry of bacteria into a cut in the skin, vasodilation of local blood vessels and increased capillary permeability occur. Which of the following events is NOT part of the adaptive immune response to the infection?
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The humerus articulates with the ulna at the
A. medial epicondyle. B. lateral epicondyle. C. capitulum. D. radial fossa. E. trochlea.