A hormone that has as its primary function the regulation of hormone secretion by another endocrine gland is classified functionally as a(n):
a. primary hormone
b. adrenal hormone
c. tropic hormone
d. helper hormone
e. secondary hormone
c
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Select the correct statement about lymphocytes.
A) The two main types are T cells and macrophages. B) B cells produce plasma cells, which secrete antibodies into the blood. C) T cells are the precursors of B cells. D) T cells are the only form of lymphocyte found in lymphoid tissue.
The functional unit of a skeletal muscle fiber is the
A) Sarcolemma. B) Sarcomere. C) Sarcoplasmic reticulum. D) Myofibril. E) Myofilament
What bone-associated structure in panel C is indicated by the arrow?
osteon epiphyseal plate periosteum trabeculae
The connecting stalk between the hypothalamus and the pituitary gland is the
A. tectum. B. cerebral peduncle. C. hippocampus. D. infundibulum.