Nodes of Ranvier are the spaces between sections of axon enwrapped with myelin. Because myelin creates an insulating layer that prevents ion flow, the progress of the action potential "jumps" from node to node, thus speeding up transmission down the axon.What other cells should you examine for effects from this mutant gene?
A. Cholinergic neurons
B. Prefrontal neurons
C. Gustatory neurons
D. Schwann cells
Answer: D
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A key contribution to Darwin's thinking was the concept of limits put on the geometric growth of populations by nature, originally proposed by:
A. Charles Lyell. B. Karl Popper. C. Russel Wallace. D. Thomas Malthus. E. Peter Raven.
The movement of sucrose and H+ into the cell by the same membrane protein reflects the actions of what type of transporter?
A. voltage-gated channel. B. mechanosensitive channel. C. uniporter. D. symporter. E. antiporter.
Most of the oxygen in the blood is transported by:
a. plasma b. serum c. platelets d. hemoglobin e. leukocytes
Meiosis is a process that produces
A. All of the answer choices are correct. B. sperm cells. C. haploid cells. D. egg cells. E. gametes.