The neurotransmitter associated with the neuromuscular junction is
a. acetylcholine.
b. acetyl CoA.
c. acetic acid.
d. glutamic acid.
e. acetylcholinesterase.
A
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The minimum stimulus required to trigger an action potential is known as the
A) threshold. B) all-or-none response. C) potential. D) incentive. E) summation.
Match the type of cell with its function.A. First cell to enter infected tissueB. Will become macrophage in tissueC. Lyses tumor and virus-infected cellsD. Cell that increases in number during a parasitic infectionE. Nonmotile cells in connective tissue that promote inflammationNatural killer cell
Fill in the blank(s) with the appropriate word(s).
The left atrium receives oxygen-rich blood from the ________.
A) coronary arteries B) venae cavae C) pulmonary veins D) descending aorta E) pulmonary arteries
Which is not true about development of the axial skeleton?
A. The sphenoid bone forms by endochondral ossification. B. The vertebrae form secondary ossification centers at puberty. C. The ribs and clavicles form from sclerotomes. D. The sternum forms by fusion of the sternal bars. E. The parietal and frontal bones develop by intramembranous ossification.