M5S1 Organization Of The Nervous System

Question 1

What does the nervous system consist of

Answer 1

Brain, spinal cord, sensory organs and all of the nerves within the body

Question 2

Function of the nervous system

Answer 2

Body’s control and communication system
-complex system that controls both voluntary and involuntary processes
-simplified into 3 steps:
Sensory input, integration, and motor output

• refer to goodnotes

Question 3

In very simple terms, describe the function of the nervous system

Answer 3

To gather information from the external or internal environment, integrating multiple signals to create a complete picture, and executing a motor output response to the environment

Question 4

Organization of the nervous system

Answer 4

Divided into two principal subdivisions:

1. Central Nervous System (CNS)
   -made up of the brain and spinal cord
   -commonly referred to as the “control center” of the body
   -where all signals come to and from, where integrated and where information can be stored
2. Peripheral Nervous System (PNS)
   -composed of all the nerves outside of the brain and spinal cord
   -includes: cranial nerves, spinal nerves, the autonomic nervous system, the special sense organs
   -brings signals to and from the central nervous system

Question 5

Overview of the nervous system

Answer 5

• refer to goodnotes image

Question 6

What is one similarity of the efferent and afferent neurons

Answer 6

Both are part of the PNS and function to carry electrical signals

Question 7

Explain one difference between efferent and afferent neurons

Answer 7

Efferent neurons are part of the motor division and carry signals away from the CNS
Afferent neurons are part of the sensory division and carry signals to the CNS