In the Accompanying Figure, the Item Identified as Number 2

question 3

Multiple Choice

In the accompanying figure, the item identified as number 2 is a wide, dark line that would probably be drawn with a ____ lead pencil.

• A) 0.3 or 0.5
• B) 0.5 or 0.7
• C) 0.7 or 0.9
• D) 0.9 or 1.1

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Definitions:

Axon terminals

The endings of axons, responsible for transmitting signals through neurotransmitters to other neurons or muscles.

Neurotransmitters

Chemical messengers that transmit signals across a chemical synapse, from one neuron (nerve cell) to another target neuron, muscle cell, or gland cell.

Enzymes

Biological molecules that significantly speed up the rate of virtually all of the chemical reactions that take place within cells.

Hormones

Chemical messengers produced by the endocrine glands in the body, which travel through the bloodstream to target organs to regulate physiology and behavior.