29.1

Unlike the parts of the nervous system, the endocrine system's parts

• work independently of one another.

• are physically disconnected.

• control many processes.

• communicate with each other.

Thoughts, movements, and some life processes are controlled by the

• nervous system.

• endocrine system.

• muscular system.

• circulatory system.

Something that causes your nervous system or endocrine system to produce a response is called a

• receptor.

• change.

• message.

• stimulus.

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Which system transmits the message that you have a pebble in your shoe?

• peripheral nervous system

• endocrine system

• central nervous system

• skeletal system

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When you compare the endocrine system to a satellite television system, a satellite dish is compared to a

• signal

• receptor

• nerve

• stimulus

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The structure that carries electrical messages away from a neuron's cell body is called a(n)

• axon.

• vesicle.

• synapse.

• dendrite.

What is a neuron's resting potential?

• the quantity of electrical impulse a cell generates

• the number of positive particles outside a cell

• the diffusion of ions inside of the cell

• the difference in charge across the cell membrane.

Which of the following describes how an action potential moves down an axon?

• Muscles contract and expand the membrane.

• Vesicles release and absorb neurotransmitters.

• Ion channels' gates open and close.

• Interneurons receive and relay signals.

What happens when an action potential reaches the axon terminal?

• Vesicles release chemicals into the synapse.

• The impulse changes its charge in the synapse.

• Neurotransmitters are broken down in the synapse.

• Na+ and K+ ions rush int he synapse.

Which phrase best describes a neurotransmitter?

• A neurotransmitter acts within a neuron.

• A neurotransmitter cannot break down.

• A neurotransmitter is a chemical signal.

• A neurotransmitter uses a sodium-potassium pump.

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