Nervous System

Question 1

Describe the divisions of the nervous system

Answer 1

It is a body wide network of nerve cells that collect and process info from the world and transmits around the body
central nervous system:
-brain:all conscious and most unconscious processing takes place
-spinal cord: receives and transmits info to and from the brain and body
Peripheral nervous system
-somatic: controls voluntary actions, skelentary movements, sensory neurons relay messages to CNS, motor neurons relay info from CNS to body
-autonomic: controls involuntary actions
- sympathetic: increases bodily activities like heart rate, release neuroadrenaline in fight or flight, neurons go to organs for prepare for rapid action
-parasympathetic: decrease bodily activities like heart rate decrease,relax, rest and digest

Question 2

Motor neurons

Answer 2

Found in CNs and controls muscle movements
They release neurotransmitters that bind to receptors of muscles to trigger response and lead to movement

Question 3

Relay neurons

Answer 3

Found between sensory input and motor output
- found in brain and spinal cord and allow sensory and motor neurons to communicate

Question 4

Sensory neurons

Answer 4

Found in receptors such as eyes ears skin
-carry nerve impulses to spinal cord and brain
-nerve impulses reach brain and translated into sensations