the nervous system

Question 1

nervous system

Answer 1

two main functions: to collect, process and respond to information in the environment and to coordinate the working of different organs and cells in the body
-consists of the central nervous system and peripheral nervous system

Question 2

central nervous system

Answer 2

• made up of the brain and the spinal cord
• brain-centre of all conscious awareness, outer layer (cerebral cortex) is highly developed, developed into two hemispheres
• spinal cord- extension of the brain, responsible for reflex actions
• CNS passes messages to and from the brain and connects nerves to the PNS

Question 3

peripheral nervous system

Answer 3

transmits messages via millions of neutrons (nerve cells) to and from the CNS, the PNS is divided in two parts

• autonomic nervous system: governs vital functions in the body such as breathing, heart rate, digestion, sexual arousal and stress responses
• somatic nervous system: controls muscle movement and receives information from sensory receptors

Question 4

autonomic nervous system

Answer 4

governs vital functions in the body such as breathing, heart rate, digestion, sexual arousal and stress responses
-transmits information to and from internal bodily organs

Question 5

somatic nervous system

Answer 5

controls muscle movement and receives information from sensory receptors
-transmits information from receptor cells in the sense organs to the CNS and receives information from the CNS that directs muscles to act