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Chapter 14: Problem 3

Unipolar, bipolar, and multipolar neurons are best described by a. Unipolar neuron has a single neurite with different segments that function as superficial receptors or terminals b. Multipolar neurons are most common in the nervous system of invertebrates c. Neurons can never contain a single axon and dendrite at opposite poles of the cell body d. Unipolar neurons make up a major part of the blood brain barrier e. All of the above

Short Answer

Expert verified
Answer: A. Unipolar neuron has a single neurite with different segments that function as superficial receptors or terminals.

Step by step solution

01

Statement A: Unipolar Neuron Description

Statement A describes that a unipolar neuron has a single neurite with different segments that function as superficial receptors or terminals. This statement is accurate. Unipolar neurons do have a single process, called a neurite, which branches into multiple segments acting as the receptors or terminals.
02

Statement B: Multipolar Neuron Description

Statement B claims that multipolar neurons are most common in the nervous system of invertebrates. This statement is inaccurate. Multipolar neurons are common in both the nervous system of invertebrates and vertebrates, not just invertebrates. They have one axon and several dendrites, allowing for complex integration and processing of information.
03

Statement C: Neurons with Single Axon and Dendrite

Statement C states that neurons can never contain a single axon and dendrite at opposite poles of the cell body. This statement is incorrect. Bipolar neurons are characterized by having one axon and one dendrite at opposite ends of the cell body. They are commonly found in the retina, olfactory epithelium, and inner ear.
04

Statement D: Unipolar Neurons and Blood Brain Barrier

Statement D asserts that unipolar neurons make up a major part of the blood brain barrier. This is inaccurate. The blood brain barrier is made up of specialized endothelial cells, astrocytes, and pericytes, not unipolar neurons.
05

Statement E: All of the above

Statement E claims that all of the above statements are true. Based on our analysis, we can conclude that statement E is incorrect, as statements B, C, and D have been shown to be false. With this analysis, we can conclude that the correct answer to the question "Unipolar, bipolar, and multipolar neurons are best described by" is: a. Unipolar neuron has a single neurite with different segments that function as superficial receptors or terminals.

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Most popular questions from this chapter

Which states that describe the synaptic vesicle are correct? a. In a neuron synaptic vesicles are also called neurotransmitter vesicles b. Vesicles store neurotransmitters and are released only during potassium- regulated exocytosis. c. Vesicles are not required for propagation of nerve impulses. d. ALL of the above

Dysfunction of GABAergic interneurons affects which clinical diseases? a. Parkinson's disease b. Alzheimer's disease c. amyotrophic lateral sclerosis d. HIV-1 dementia e. Schizophernia and bi-polar disorders f. None of the above

Which of the following is true to describe Wallerian Degeneration? a. If a nerve fiber is crushed, the part proximal to the injury (i.e. the part of the axon that is connected from the neuron's nucleus) will degenerate b. Target tissues of the nerve (typically an innervated muscle) never atrophies c. Wallerian degeneration is named after Augustus Volney Waller who first described it in 1850 , in the Zebra fish d. None of the above
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