nervous system

Question 1

what does the cns stand for?

Answer 1

central nervous system

Question 2

what is the cns comprised of?

Answer 2

brain and spinal cord

Question 3

what does pns stand for?

Answer 3

peripheral nervous system

Question 4

what is the pns comprised of?

Answer 4

all the other nerves to the extremities and organs

Question 5

what does the sensory neurone do?

Answer 5

carries messages from the the peripheral sensory organs to the cns

Question 6

what does the motor neurone do?

Answer 6

conveys instructions from the cns to effector organs

Question 7

what are effector organs?

Answer 7

muscles or glands

Question 8

what is the role of dendrites?

Answer 8

fibre carrying impulse towards the cell body

Question 9

what is the role of the cell body?

Answer 9

contains the nucleus and most of the cytoplasm

Question 10

what is the role of the nucleus?

Answer 10

contains dna for protein synthesis

Question 11

what is the role of the axon?

Answer 11

fibre carrying impulse away from the cell body

Question 12

what is the myelin sheath made of?

Answer 12

schwaan cells

Question 13

what is the role of schwaan cells?

Answer 13

an insulting material that covers the axon

Question 14

what are the small gaps in the myelin sheath?

Answer 14

nodes of ranvier

Question 15

what is the role of the nodes of ranvier?

Answer 15

sped up conduction of a nerve impulse

Question 16

what are axon endings?

Answer 16

where neurotransmitters are made

Question 17

what is the role of synaptic end bulbs?

Answer 17

secrets neurotransmitters into synaptic clefts causing impulses to transmit in the next neurone