The S2 DUB is caused by?
a. Closing of the AV valves
b. Closing of the semilunar valve
c. Opening of the AV valves
d. opening of the Semilunar valve
Answer: b. Closing of the semilunar valve
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The opening in the center of the iris is the:
A) pupil. B) retina. C) lens. D) conjunctiva.
Which of the following statements regarding immunoglobulins is correct?
a. Immunoglobulins make up five classes (or isotypes) called IgA, IgD, IgE, IgG, and IgM. b. Regardless of their isotype, immunoglobulins all have the same effector function. c. Antibodies consist of four identical heavy chains and four identical light chains. d. Peptide bonds hold the heavy and light chains together. e. The constant regions make up the antigen-binding site.
The type of joint that has articulating surfaces and allows moderate amounts of flexibility is a
(a) synovial joint (b) condyloid joint (c) fibrous joint (d) cartilaginous joint
A group of genetic diseases that are characterized by progressive weakness and degeneration of the skeletal muscles that control movement are collectively known as ____
A) ?myasthenia gravis B) ?muscular dystrophy C) ?polymyositis D) ?impingement syndrome