If fertilization occurs, the ________ is maintained because the embryo secretes ________
A) corpus albicans; human chorionic gonadotrophin
B) corpus luteum; luteinizing hormone
C) corpus cavernosum; human chorionic gonadotrophin
D) corpus luteum; human chorionic gonadotrophin
E) corpus albicans; placental prolactin
D
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A group of nerve cell bodies outside the CNS is called a ________
A) Dendrites B) Ganglion C) Axons D) Glia
During a primary humoral response to antigens all of the following occur except
A) B cells may differentiate into plasma cells immediately. B) B cells may undergo several rounds of mitosis before producing plasma cells and memory cells. C) antibody levels do not peak until 1 to 2 weeks after the initial exposure. D) neutrophils invade the surrounding areas, releasing chemotactic substances. E) the first immunoglobulins to appear in circulation are of the IgM type.
This figure shows a cross section of a vertebra and the spinal cord. What structure does number 1 indicate?
A. Epidural space B. Pia mater C. Subarachnoid space D. Central canal E. Dura mater
In the following chemical reaction, what is NaCl? NaOH + HCl ? NaCl + H2O
A) water B) reactant C) acid D) product