Answered: Identify the principal structures of a…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

Identify the principal structures of a neuron and describe the functions of each.

Expert Solution

Step 1

Neurons also called as nerve cells.They send and receive signals from the brain.

At birth ,human brain consists of an approximately 100 billion neurons.

Each part of neurons plays an important role in communication of information throughout the body.

Step 2

Principle structure of neurons:

Dendrites:They are tree like extensions at the beginning of neuron which help in increasing of surface area of cell body.Dendrites are the tiny protrusions which receive information from other neurons and transfer electrical stimulation to the soma.

Synapses covers the dendrites.

Characteristics:

May have many or single dendrites
They are short in size and highly branches
Transmit information to cell body

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