Macrophages
A. reduce the inflammatory response.
B. are the first at the site of infection.
C. are derived from basophils.
D. produce cytokines that aid in the destruction of antigens.
E. are responsible for most phagocytic activity in the late stages of an infection.
Answer: E
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__________ pass(es) from the maternal blood to the fetal blood. Fetal __________ pass(es) the other way.
A. Carbon dioxide and oxygen; wastes B. Carbon dioxide; nutrients C. Wastes; nutrients and oxygen D. Wastes and nutrients; oxygen and carbon dioxide E. Oxygen and nutrients; wastes
Which is the correct sequence in the transmission of a neural impulse?
a. Axon--Dendrite--Cell body--Synapse b. Dendrite--Axon--Cell body--Synapse c. Synapse--Axon--Dendrite--Cell body d. Axon--Synapse--Cell body--Dendrite e. Dendrite--Cell body--Axon--Synapse
Each spinal nerve (except C1) receives sensory information from a specific region of the skin called a __________.
Fill in the blank(s) with the appropriate word(s).
A single stimulus-contraction-relaxation sequence in a muscle fiber is known as a(n)
A) incomplete tetanus. B) latent period. C) complete tetanus. D) summation. E) twitch.