⭐️ the nervous system✅

Question 1

what is the nervous system made up of?

what are the two things it’s divided into?

Answer 1

neurons of cells that carry messages to and from the brain and spinal cord to different parts if the body

1- central nervous sytem (CNS)
2- peripheral nervous system (PNS)

Question 2

CNS:
what is the CNS made up of?

what is the brain surrounded by?

what Is the brain separated into and what do they control?

Answer 2

the brain and the spinal cord

the cerebral Cortex

left and right hemispheres
left = controls right side of body
right= controls left side of body

Question 3

CNS:

where does the spinal cord send messages to and from?

what is the spinal cord responsible for?

Answer 3

the brain

reflex actions eg. when you touch a hot surface it sends signals to your brain to take your hand away.

Question 4

PNS:
how does the PNS send messages to and from the
CNS?

what can the PNS be subdivided into?

Answer 4

via neurons

• the autonomic nervous system = governs vital functions such as breathing rate and digestion.
• somatic nervous system = governs muscle movement and receives info from out sensory receptors

Question 5

what is the somatic nervous system?

what is the autonomic nervous system?

Answer 5

transmits info from receptor cells, receives info from the CNS on how muscles act (voluntary movement)

transmits info to and from internal organs and its automatic → sympathetic and parasympathetic (involuntary)