Nervous system I

Question 1

what is the CNS made up of?

Answer 1

brain and spinal cord

Question 2

what is the PNS made up of?

Answer 2

all of the nervous outwith the brain and spinal cord:
- somatic nervous system
- autonomic nervous system

Question 3

what is the function of a dendrite?

Answer 3

receives signals from other neurons

Question 4

what is the function of an axon?

Answer 4

sends signals to other neurons

Question 5

what is the function of a motor neuron?

Answer 5

sends signals to our muscles telling them to move

Question 6

what is the function of a sensory neuron?

Answer 6

sends signals from sensory organs

Question 7

what is the function of a relay neuron?

Answer 7

connects neurons to other neurons

Question 8

what is the brain responsible for?

Answer 8

• thinking
• learning
• memory
• emotion

Question 9

what is the function of the cerebral cortex?

Answer 9

• planning
• reasoning
• language
• recognising sound and images
• memory

Question 10

what is the function of the cerebellum?

Answer 10

• important for coordination
• precision
• timing of movement

Question 11

what is the function of the corpus callosum?

Answer 11

connects brains right and left hemispheres

Question 12

what is the function of the brain stem?

Answer 12

• regulates HR, breathing, sleep cycles and emotions

Question 13

what are the functions of the cerebrum?

Answer 13

• mental activities
• sensory perception
• initiation and control

Question 14

what are the 3 membranes (meninges) which enclose the brain and spinal cord?

Answer 14

• inner layer- pia mater
• middle layer- arachnoid mater
• outer layer- dura mater

Question 15

where is the midbrain located and what is its function?

Answer 15

• located between the cerebrum above and the pons below
• relay station

Question 16

where is the pons located and what is its function?

Answer 16

• located infront of cerebellum below midbrain and above medulla
• autonomic NS

Question 17

where is the medulla located?

Answer 17

lies above the foramen magnum and attaches to the spinal cord

Question 18

what is the function of the medulla?

Answer 18

several cranial nerves arise and form groups of neuron cell bodies in the medulla

Question 19

what is the cerebellum located?

Answer 19

situated behind the pons

Question 20

where is white matter located in the brain?

Answer 20

inner section

Question 21

where is grey matter located in the brain?

Answer 21

outer section

Question 22

describe the characteristics of the spinal cord?

Answer 22

• elongated cylindrical part of CNS
• lies within vertebral canal
• continuous with medulla
• approx. 18” long

Question 23

what is the function of the spinal cord?

Answer 23

• link between brain and organs
• conveys impulses to and from brain

Question 24

where is white matter located in the spinal cord?

Answer 24

outer section

Question 25

where is grey matter located in spinal cord?

Answer 25

inner section

Question 26

describe the characteristics of grey matter in the spinal cord?

Answer 26

• resembles H shape
• motor nerves situated in anterior horn
• sensory nerve fibres enter spinal cord via posterior horn

Question 27

describe the characteristics of white matter in the spinal cord?

Answer 27

• arranged in columns
• formed by sensory nerve fibres ascending to the brain