The Nervous System

Question 1

What are the major components of the nervous system

Answer 1

CNS- brain and spinal cord
PNS- autonomic > sympathetic and parasympathetic > sensory input and motor output

Question 2

describe the structure of a nerve cell (neurone)

Answer 2

dendrites, nucleus, cell body, axon hillcock, axolemma, axon, neurilemma, nucleus of schwann cell, nodes of ranvier, myelin sheath, terminal boutons

Question 3

what myelinates axons in the CNS and PNS

Answer 3

oligodendrocytes: CNS, schwann cells: PNS

Question 4

describe the function of ependymal cells

Answer 4

secrete cerebrospinal fluid
to reduce friction between the skull and brain and get rid of waste and get nutrients to the brain

Question 5

describe the structure of sensory neurones

Answer 5

pseudo unipolar: one long axon, fake as have a dendron not two axons
bipolar: two axons

Question 6

identify the structures of the spinal cord

Answer 6

label

Question 7

what are the basic components of the CNS

Answer 7

cerebral hemispheres
brainstem and cerebellum
spinal cord

Question 8

describe the function of the cerebellum

Answer 8

controls and coordinates the movements of various groups of skeletal muscles, ensuring smooth, steady and precise actions

Question 9

describe the function of the cerebrum

Answer 9

controls voluntary muscle movement of the body