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Ap Bio Chapter 48 Answers

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Submitted By Walrusman222
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AP Biology Reading Guide
Fred and Theresa Holtzclaw

Chapter 48: Neurons, Synapses, and Signaling

Name _______________________ Period ___________

Chapter 48: Neurons, Synapses, and Signaling
Concept 48.1 Neuron organization and structure reflect function in information transfer
1.

What is a neuron?

2.

Neurons can be placed into three groups, based on their location and function.
Type of Neuron

Function
Transmit information from a sense receptor to the brain or spinal cord

sensory neurons

Integrate information within brain or spinal cord; connect sensory and motor neurons; located entirely within the CNS

interneurons

Transmit information from the brain or spinal cord to a muscle or gland;
Cause muscle contraction or gland secretion

motor neurons

3.

Neurons are the nerve cells that transfer information within the body.

Which division of the nervous system includes the brain and spinal cord?
The central nervous system

4.

This sketch shows two neurons. Label the following elements of this figure: cell body, dendrites, axon, synapse, presynaptic cell, postsynaptic cell, synaptic vesicles, synaptic terminal, and neurotransmitter. axin

synapse

presynapse cell

dendrites

vesticles

synapse

postsynapse

5.

What is shown in the box above? What do the red spheres represent?
Chemical signal

Copyright © 2010 Pearson Education, Inc.

-1-

AP Biology Reading Guide
Fred and Theresa Holtzclaw
6.

Chapter 48: Neurons, Synapses, and Signaling

What is indicated by the red arrows in the main figure?
That a signal is being passed

7.

What are glial cells?
The neurons of vertebrates and most invertebrates require supporting cells called glial cells, or glia, which nourish neurons, insulate the axons of neurons, and regulate the extracellular fluid surrounding neurons.

Concept 48.2

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