nerve action Flashcards

1
Q

what is the myelin sheath

A

fatty layer along the axon

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2
Q

what does the myelin sheath do

A

speeds up nerve transmission

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3
Q

what is a Schwann cell

A

this is wrapped around the axon

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4
Q

what is an axon

A

this is the terminal at the end of the neurones which are used to communicate with other neurones

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5
Q

what is a nucleus

A

contains the DNA

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6
Q

what is a dendrite

A

branch like structure which carries nerve impulses to the next neurone

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7
Q

what is the nodes of Ranvier

A

these are gaps within the myelin sheath which speed up the impulses by forcing them to jump across the gaps

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8
Q

what is a motor neurone

A

connects the central nervous system to the muscles and glands

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9
Q

what is a relay neurone

A

acts as a connection between sensory/ motor neurones and other relay neurones

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10
Q

what is a sensory neurone

A

carries impulses from the peripheral nervous system to the central nervous system

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11
Q

what is a synapse

A

this is a gap between neurones and muscle cells

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12
Q

how is a neurotransmitter produced

A

this occurs when a nerve impulse arrives at a synapse

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13
Q

what is the purpose of the pituitary

A

regulates the other endocrine glands

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14
Q

where is the pituitary located

A

the base of the brain

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15
Q

which hormones are produced in the pituitary

A

somatotropin
prolactin
LH/FSH
oxycotin
ADH

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16
Q

what is the action of somatotropin

A

bone growth

17
Q

what is the action of prolactin

A

produces breast milk

18
Q

what is the action of LH and FSH

A

controls the menstrual cycle

19
Q

what is the action of oxycotin

A

initiates contraction of the uterus

20
Q

what is the action of ADH

A

triggers uptake of water from urine into the kidneys

21
Q

where is the thyroid located

A

In the neck

22
Q

What does thyroxine do

A

Regulates the cell metabolism

23
Q

What does calcito run do

A

Regulates calcium absorption and use

24
Q

which hormones are produced at the thyroid

A

-Thyroxine
-Calcito run

25
Which hormones are produced at the pancreas
-insulin -glucagon
26
Where is the adrenal gland located
Above the kidney
27
Which hormone is produced at the adrenal gland
Adrenaline
28
What is the function of adrenaline
Prepared the body for action
29
what are hormones
-chemical messengers -produced by glands/organs -carried by blood -they act on specific organs