ANAT 100 BLOCK THEORY 2 QUESTIONS WITH
VERIFIED ACCURATE ANSWERS
What are the three steps of the nervous system? - Answers - 1. Sensory input
2. Integration
3. Motor output
What is sensory input? - 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? - Answers - Processing and interpretation of sensory input
What is motor output? - 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? - Answers - Central
Peripheral
What is the function of the CNS? - Answers - »Where all signals come to and from
»Where they are integrated
»Where information can be stored
What is the function of the PNS? - 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? - Answers -
Sensory (afferent) division
Motor (efferent) division
What does the sensory division do? - 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? - 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? - Answers -
Somatic
Autonomic
, What is the function of the somatic nervous system? And how does it do that? -
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? - Answers - Controls involuntary
movement
What can the autonomic nervous system be further divided into? - Answers -
Sympathetic - fight or flight
Parasympathetic - rest and digest
What do neurons do? - 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 - Answers - cell body, dendrites, axon
What does the cell body do in a neuron? - 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? - Answers - Receive the neuronal signal form
other neurons and transfer those signals to the cell body
What does the axon do in a neuron? - 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? - Answers - Unidirectional
What are the characteristics of a pseudo-unipolar neuron? - 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? - 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
VERIFIED ACCURATE ANSWERS
What are the three steps of the nervous system? - Answers - 1. Sensory input
2. Integration
3. Motor output
What is sensory input? - 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? - Answers - Processing and interpretation of sensory input
What is motor output? - 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? - Answers - Central
Peripheral
What is the function of the CNS? - Answers - »Where all signals come to and from
»Where they are integrated
»Where information can be stored
What is the function of the PNS? - 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? - Answers -
Sensory (afferent) division
Motor (efferent) division
What does the sensory division do? - 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? - 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? - Answers -
Somatic
Autonomic
, What is the function of the somatic nervous system? And how does it do that? -
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? - Answers - Controls involuntary
movement
What can the autonomic nervous system be further divided into? - Answers -
Sympathetic - fight or flight
Parasympathetic - rest and digest
What do neurons do? - 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 - Answers - cell body, dendrites, axon
What does the cell body do in a neuron? - 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? - Answers - Receive the neuronal signal form
other neurons and transfer those signals to the cell body
What does the axon do in a neuron? - 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? - Answers - Unidirectional
What are the characteristics of a pseudo-unipolar neuron? - 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? - 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
