5.nervous system

Question 1

functions of nervous system

Answer 1

• receive stimuli from externial and internal enviro
• analyse and the intergrate these stimuli
• bring about necessary response

Question 2

myelin

Answer 2

is a lipoprotein material made by schwann cells surrounding the axon
- interupted by spaces called nodes of ranvier and through this that the axon tissue recevies its nurtients and oxygen

Question 3

sensory

Answer 3

carry impulses towards the CNS

Question 4

motor

Answer 4

carry impulse away from CNS

Question 5

mixed nerves

Answer 5

carry both

Question 6

afferent nerves

Answer 6

carry impulses towards the structure ususally CNS

Question 7

efferent nerves

Answer 7

carry impulses away from the structure ususally CNS

Question 8

parts of the forebrain

Answer 8

cerebrum
thalamus
hypothlamus

Question 9

corpus callosum

Answer 9

links the right and left hemisphere together

Question 10

cerebral cortex

Answer 10

outer layer of grey matter containing millions of cell bodies

Question 11

functions of the hypothalamus

Answer 11

• acts as link between the endocrine and ns
• helps control ANS by influcing range if involunatry actions
• exters major influeneves over homestatsis in the body by influcnecing osmotic body fluids.

Question 12

found on ventral surface of forebrain

Answer 12

• optic chiama
• pituarty gland
• olfactory bubli

Question 13

parts of the hindbrain

Answer 13

cerebellum
pons
medulla oblongata

Question 14

function of pons

Answer 14

contains centres that control respiration

Question 15

function of medulla oblongata

Answer 15

extends from pons and merges into the spinal cord

- contains centres responsible for the control of respiration and BP

Question 16

functions of cerebellum

Answer 16

• dorsal surface of hindbrain
• controls balance and coordination
• receives info from semicircular canals of inner ear and muscles spindles within skeletal muscles

Question 17

3 layers of meninges

Answer 17

• dura mater ( tough fibrous layer )
• arachonoid mater ( netwrok of collegn fibres and larger blood vessels)
• pia mater ( delicate membrane that adheres to brain, spinal cord and follows gyri and sulici)

Question 18

2 componets of each spinal nerve

Answer 18

• dorsal root ( carries sensory fibers towards the spinal cord)
• ventral root ( carries motor fibers away from spinal cord)

Question 19

nerves in the pectoral limb

Answer 19

radial nerve
median nerve
ulnar nerve

Question 20

nerves in pelvic limb

Answer 20

femoral nerve
saphenous nerve
sciatic nerve
tibial nerve

Question 21

reflex arc

Answer 21

• muscle stregthes
• innitates response in the muscle spcindles and a nerve impulse passes along the sensory nerve to the spinal cord
• within the grey matter of the spinal cord the sensory nerve synapses with the motor nerve and impulse passes along it to the muslce fibers causing contraction
• extends or kicks out the leg completing the reflex arc

Question 22

where is manly symp functions from

Answer 22

T1 to L1