What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 23, Problem 2SA
Summary Introduction
To review:
How the structure and roles of neurons and glial cells compare with each other.
Introduction:
Neurons are the cells of the nervous system that carry electrical signals, while the glial cells are the cells that support the neurons.
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Chapter 23 Solutions
What is Life? A Guide to Biology with Physiology
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- This is a biology question regarding nerve impulses. Neurofibromatosis type 1 is a condition where tumours can grow in the nerves near the skin. The growth of tumours prevents the action potentials from quickly travelling through the neurons. Identify the nerve structure from the image below and the division of the nervous system affected by neurofibromatosis type 1. CNS = Central Nervous System PNS = Peripheral Nervous System Select one: a. Nerve Structure Division of Nervous System 3 PNS b. Nerve Structure Division of Nervous System 4 CNS c. Nerve Structure Division of Nervous System 5 PNS d. Nerve Structure Division of Nervous System 1 CNSarrow_forwardDraw a neuron, label its parts, and describe the functions of these parts.arrow_forwardCompare and contrast the two main types of neural circuits in the central nervous system?arrow_forward
- Visit this site (http://openstaxcollege.org/l/nervetissue3) to learn about how nervous tissue is composed of neurons and glial cells. Neurons are dynamic cells with the ability to make a vast number of connections, to respond incredibly quickly to stimuli, and to initiate movements on the basis of those stimuli. They are the focus of intense research because failures in physiology can lead to devastating illnesses. Why are neurons only found in animals? Based on what this article says about neuron function, why wouldn't they be helpful for plants or microorganisms?arrow_forwardMultiple sclerosis (MS) is a disorder that causes the destruction of myelin sheaths surrounding neurons. People with MS display many symptoms, including slurred speech, double vision, and poor muscle coordination. What is the direct effect of MS on nerve impulse transmission? Select one: The movement of impulses along neurons is slower than normal. Dendrites cannot be stimulated by acetylcholine, therefore impulses are not generated in neurons. The threshold level of stimulation for neurons is greater than normal. Axons cannot sectete acetylcholine, therefore impulses are not able to travel across synapses. Oarrow_forwardThe presence of an electrical gradient is responsible for both the resting membrane potential and the action potential in the neuron.a. In this case who is responsible for maintaining the electric gradient to produce a potential for the resting membrane?b. Explain what is meant by an electrical gradient in the context of a cell (neuron)!arrow_forward
- Name the three basic types of neuron and describe their functions.arrow_forwardFor the nervous system to convey information using electrical signals, the signals typically must be passed from one neuron to another. Oftentimes, this transfer of information across the synapse occurs via the release of neurotransmitters from the pre-synaptic terminal. When a large stimulus is detected in one neuron, it often conveys this information by releasing a larger amount of neurotransmitter into the synapse.arrow_forwardConsider the following image that shows the membrane potential in a neuron when it is transmitting an electrical signal: 2 1 What does arrow "1" represent? The hyperpolarization potential The threshold potential The resting membrane potential The action potentialarrow_forward
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