Exam-1 B BIO 2870 - 1) In the peripheral nervous system,...

1) In the peripheral nervous system, myelin is formed by ________. In the central nervous system, myelin is
formed by ________.
A) Schwann cells : microglial cells B) Schwann cells : astrocytes
C) oligodendrocytes : Schwann cells D) Schwann cells : oligodendrocytes
2) The diaphragm muscle separates the ________ from the ________. 3) The narrow passageways that contain cytoplasmic extensions of osteocytes are called
4) In myelinated axons, sodium and potassium channels would be concentrated in what area? 5) The innermost serous membrane covering the outside of the heart is the:
A) visceral pericardium B) parietal pericardium
C) visceral pleura D) synovial layer E) peritoneum
6) Which of the following is the correct order of events that occur at a cholinergic synapse?
1. Extracellular calcium enters the axon terminal, triggering the exocytosis of acetylcholine.
2. Acetylcholine is removed by acetylcholinesterase.
3. Acetylcholine binds to receptors and depolarizes the postsynaptic membrane.
4. Axon terminal depolarizes.
7) The ________ glands in the axilla become active at the time of puberty.
8) At rest, active sites on the actin are blocked by
9) Cells that store fat are called
A) cellulocytes. B) macrocytes. C) adipocytes.
D) podocytes. E) melanocytes
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10) After death, muscle fibers run out of ATP and calcium begins to leak from the sarcoplasmic reticulum into
the sarcoplasm. This results in a condition known as
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