Within the vestibule, the ____ partially closes the distal end of the vagina.
a. clitoris
b. hymen
c. glans
d. labia
b
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Lymphatic tissues that form a protective ring around the back of the nose and throat are called __________
Fill in the blank(s) with the appropriate word(s).
Which of the following describes the excitatory postsynaptic potential?
A) moves membrane potential away from threshold B) opens K+ or Cl- channels C) short distance depolarization D) short distance hyperpolarization
Swelling and soreness of the lymph nodes indicate that __________.
A) the immune system is incapable of working. B) dangerous cancerous changes are occurring in the immune system. C) immune cells are fighting infection. D) too much or improper exercise has been undertaken. E) None of the answers are correct.
What unit of measurement is often used to measure cell size?
A. Micrometer B. Nanometer C. Centimeter D. Millimeter