Unit 1 AOS 1 SAC 1

Question 1

What are the two branches of the nervous system?

Answer 1

Central Nervous System (CNS)

Peripheral Nervous System (PNS)

Question 2

Central nervous system (CNS)

Answer 2

-processes and responsibilities to information from the PNS
Comprises of the brain and spinal cord
-brain: forebrain, midbrain & hindbrain
-spinal cord: incased in the spinal column
nerve extends from base of brain to lower back
spinal reflex (invoultantry response)

Question 3

Peripheral Nervous System (PNS)

Answer 3

TWO FUNCTIONS: - communicate info from organs to CNS, both internal and external

• to communicate info from the CNS to the body organs.
• SOMATIC SYSTEM
• AUTONOMIC SYSTEM

Question 4

Peripheral Nervous System (PNS)

SOMATIC SYSTEM

Answer 4

-SOMATIC SYSTEM: voluntary movements
motor neurons communicate messages from the CNS to the particular muscles intended to be moved.
Sensory neurons- sensory information (senses)

   Motor neurons- Movement

Question 5

Peripheral Nervous System (PNS)

AUTONOMIC SYSTEM

Answer 5

-AUTONOMIC SYSTEM: involuntary or automatic movemnt
Eg. breathe, digest , circulation and blinking
Sympathetic NS: activated in times of stress
fight/flight/frezze
heart rate goes up

       Parasympathetic NS: maintain state of calm 
       returns body to homeostasis (parashoot coming back down)