The thymus
a. is the site of maturational processing for T lymphocytes
b. secretes a collection of hormones important in maintaining the T-cell lineage
c. gradually atrophies and becomes less important as an individual matures
d. is a lymphoid organ
e. has all of the above characteristics
E
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a) Menstrual phase b) Preovulatory phase c) Proliferative phase d) Follicular phase e) Postovulatory phase
The skull is the body's most complex bony structure. It is formed by cranial and facial bones. The cranial bones, or cranium, enclose and protect the fragile brain. A helmet would add extra protection in sports where there is an increased risk for head injury.
What will be an ideal response?
The volume of air that enters the lungs during forced maximal inspiration is the
A) inspiratory reserve volume. B) vital capacity. C) expiratory reserve volume. D) tidal volume.
Second-order neurons synapse with third-order neurons in the ________.
A. dorsal root ganglion B. spinal cord C. cerebral cortex D. medulla oblongata E. thalamus