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What are the three steps of the nervous system? correct answers 1. Sensory input 2. Integration 3. Motor output What is sensory input? correct answers Sensory input from the environment is detected by sensory nerves and travels through the body to communicate with other nerve cells What is ...

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  • October 18, 2024
  • 15
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • what are the three steps of the nervous system

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  • ANAT 100 Block Theory 2
  • ANAT 100 Block Theory 2

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ANAT 100 Block Theory 2 || with A+ Guaranteed Solutions.
What are the three steps of the nervous system? correct answers 1. Sensory input
2. Integration
3. Motor output

What is sensory input? correct answers Sensory input from the environment is detected by
sensory nerves and travels through the body to communicate with other nerve cells

What is integration? correct answers Processing and interpretation of sensory input

What is motor output? correct answers a response to integrated stimuli; the response activates
muscles or glands by sending motor output through motor nerves

What are the two principal subdivisions of the nervous system? correct answers Central
Peripheral

What is the function of the CNS? correct answers »Where all signals come to and from
»Where they are integrated
»Where information can be stored

What is the function of the PNS? correct answers System that brings those signals to and from
the CNS

What are the two divisions that the PNS can be further broken down into? correct answers
Sensory (afferent) division
Motor (efferent) division

What does the sensory division do? correct answers Relays information to CNS
Sensing things such as sight, smell, touch and even pain
Sends the information to the CNS through sensory neurons

What does the motor division do? correct answers Relays information from CNS to target cells
The actual response that is elicited
Signal comes from the CNS, the brain, or spinal cord and is relayed to a target cell through
efferent neurons

What subdivisions can the motor (efferent) division be further divided into? correct answers
Somatic
Autonomic

What is the function of the somatic nervous system? And how does it do that? correct answers
Controls voluntary movement

Signal comes from the CNS through the efferent neurons to a target skeletal muscle cell, eliciting
movement of that muscle

, What is the function of the autonomic nervous system? correct answers Controls involuntary
movement

What can the autonomic nervous system be further divided into? correct answers Sympathetic -
fight or flight
Parasympathetic - rest and digest

What do neurons do? correct answers Structural units of the nervous system.

Allow for communication within and between the CNS and PNS.

Can generate and transmit rapid electrical signals to other neurons

Neuron Structure correct answers cell body, dendrites, axon

What does the cell body do in a neuron? correct answers Functions to transfer electrical signals
from the dendrites to the axon
Also called the 'soma'
Houses the nucleus and other organelles

What does the dendrites do in a neuron? correct answers Receive the neuronal signal form other
neurons and transfer those signals to the cell body

What does the axon do in a neuron? correct answers Carry the signal from the cell body to the
axon terminals, where the signal is then transferred to other neurons or organs

What is the direction of a nerve impulse? correct answers Unidirectional

What are the characteristics of a pseudo-unipolar neuron? correct answers Have one cellular
process that splits into a dendrite and an axon.

Example: general sensory nerves

What are the characteristics of a bipolar neuron? correct answers Have one dendrite and one
axon that extend directly from the cell body

Have two distinct cellular processes

Only found in special sense, like sight and hearing

What are the characteristics of a multipolar neuron? correct answers Have multiple dendrites and
one axon, summing to three or more cellular processes

Number of dendrites is variable

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