The first line of defense against bacterial infection from coming in contact with a contaminated surface is
a. macrophages.
b. mast cells.
c. the skin.
d. mucous membranes.
e. Langerhan cells.
C
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Which of the following is true about the uterine tubes?
A) The ampulla is a narrow constricted region. B) The infundibulum is the expanded region of the uterine tube. C) The isthmus is the normal site of fertilization. D) None of the listed responses is correct.
Which of the cortical areas listed below is most likely to be stimulated first when repeating a word you just heard spoken?
A. auditory association area B. Broca area C. primary motor area D. primary auditory cortex E. Wernicke area.
Mucous connective tissue is found only in
A. the cartilage of the nose. B. certain bones of the skull. C. the umbilical cord. D. serous fluid. E. fibers of the respiratory system.
gap junctions allow direct communication or ionic flow between adjacent cells for a(n) ____ synapse, while synapses that use neurotransmitters to signal from the presynaptic to postsynaptic cell are called ___ synapses.
Fill in the blank(s) with the appropriate word(s).