HIV-1 infects
A. CD8 (cytotoxic T cells).
B. CD4 (helper T cells).
C. memory T cells.
D. B cells.
Answer: B
Anatomy & Physiology
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The atrioventricular valves (tricuspid and bicuspid) open when the papillary muscles:
A) contract B) relax
Anatomy & Physiology
Human vision is limited to wavelengths ranging from ________ nm
A) 40 to 700 B) 400 to 7,000 C) 4 to 70 D) 400 to 700 E) 4,000 to 7,000
Anatomy & Physiology
The largest synovial joint in the body is the
A. shoulder. B. knee. C. hip. D. elbow.
Anatomy & Physiology
Which layer of dense connective tissue serves to protect the inner parts of the eyeball?
a) Sclera b) Pupil c) Iris d) Cornea e) Retina
Anatomy & Physiology