Nervous System

Question 1

Parts of a nerve cell

Answer 1

Cell body 
Dendrites 
Axon 
Myelin sheath 
Neurilemma
Node of fancier 
Acon terminals 
Synapse

Question 2

Nerve impulses jump via

Answer 2

Neurotransmitter chemicals released by nerve endings

Question 3

What is a nerve impulse in terms of chemical

Answer 3

Sodium and potassium ions inside a cell

Positively charged

In resting state the concentration of sodium is lower inside than in the tissue outside and potassium is higher inside than outside

Sodium potassium pump

Restoring in inside of the cell having more negative charge than outside

When a sense is detected by a receptor the axon membrane becomes more open to receiving sodium ions which rush in and make the cell more positive

Question 4

Nerve impulses only travel

Answer 4

1 direction

Question 5

Cerebrum function

Answer 5

Control voluntary movement

Question 6

Cerebellum small brain function

Answer 6

Muscle tone posture coordinate muscle activity

Question 7

Hypothalamus within cerebrum function

Answer 7

Regulates body temperature water balance and metabolism And drives such as hunger sex pain thirst appetite

Regulates pituitary

Master gland
Links nervous and endocrine
Secretes oxytocin and ADH

Question 8

Brain stem parts

Answer 8

Mid brain pons medulla

Question 9

Function of midbrain

Answer 9

Relay station

Messages to and from spinal cord and cerebrum and cerebellum

Question 10

Pons function

Answer 10

Messages to and from spinal cord and cerebrum

Question 11

Medulla location

Answer 11

Above spinal cord below pons

Question 12

Construction of medulla

Answer 12

White matter on surface grey matter in centre

Question 13

Why is medulla vital centre

Answer 13

Vagus verve controls heart and lungs and breathing and swallowing

Question 14

Cervical plexus

Answer 14

C1-4

Question 15

Brachial plexus

Answer 15

C5-T1

Question 16

Lumbar plexus

Answer 16

L123 and part of 4

Question 17

Sacral plexus

Answer 17

L45 S1234

Question 18

Macula is

Answer 18

Bulls eye

Question 19

Dead centre of bulls eye is

Answer 19

Fovea

Question 20

Role of fovea

Answer 20

Focal point sensitive light

Question 21

Two kinds of photo receptors

Answer 21

Rods and cones

Question 22

Role of retinal pigment epithelium

Answer 22

Absorb excessive light

Move nutrients and waste from receptors to choroid

Question 23

Bruchs membrane

Answer 23

Separates choroid from rpe

Question 24

What is choroid

Answer 24

Made of tiny blood vessels that supply nutrition to retina, lays behind the retina

Question 25

What’s dores root ganglion

Answer 25

Cell bodies of sensory neurons are located

Question 26

Somatic aka

Answer 26

Voluntary

Question 27

Parasympathetic NS post ganglionic neurons are

Answer 27

Very short

Question 28

Which sympathetic structure do pain sensations go through in the parasympathetic system to get in spinal cord

Answer 28

Same chain that sympathetic motor neurons come down