What Are the DNA Sequences That Cap Chromosomes and Become

question 104

Multiple Choice

What are the DNA sequences that cap chromosomes and become shorter as cells replicate?

• A) telomeres
• B) free radicals
• C) cellular clocks
• D) amino acids

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Definitions:

Neurotransmitter

Chemical substances that transmit signals across a synapse from one neuron to another in the nervous system.

Local Potential

Changes in the electric potential of a neuron's membrane that are confined to a small area, unlike action potentials that can spread.

Neurotransmitters

Chemicals released by nerve cells to transmit signals across a synapse to another nerve cell, muscle cell, or gland cell.

Synaptic Cleft

Space between the presynaptic and the postsynaptic membranes.