nervous system

Question 1

What is the nervous system

Answer 1

helps info get carried from one part of the body to another

in the form of electric/nervous impulses via ‘nerves’

coordination of these by the nervous system

Question 2

What’s the nervous system made of

Answer 2

Central nervous system
comprised of the brain and spinal chord - it processes info from all parts of the body and coordinates this into action

peripheral nervous system
all the vast network of nerves outside (from and leading into) the brain / spinal chord

Question 3

The brain

Answer 3

Has central control of the nervous system

receives nervous impluses from all over the body, and from the brain back again = response to surrounding environment

coordinates these signals into voluntary and involuntary activity

all organs, muscles, sense are connected to the brain

Question 4

what’s the brain involved in..

Answer 4

1. autonomic (non voluntary) control of process - lungs, heart , temperature, release of hormones
2. coordinateion and response to sensory info from eyes, nose, etc
3. voluntary control of muscle activity
4. Information processing and decision making

Question 5

The peripheral nervous system

Answer 5

Autonomic nervous system:
Unconscious
controls organs and body function involuntarily (heart, sweating, etc)

Sensory somatic system - Conscious
Voluntary control using muscle and sensing external stimuli - picking up a cup, flying, walking.
Training and experience is needed

Entric system
Controls activities and functions of the gut

Question 6

What the authomic nervous system broken into

Answer 6

Sympathetic division:
Responsible for preparing the body for action - le releasing adrenaline

parasympathetic division:
returning the body back to normal - releasing noradernaline

Question 7

What is proprioceptor

Answer 7

receptors located in the muscle

detect and relay info about the length of extension for each muscle

resposible for semi-automatic movement of limbs and voluntary movments in general

ex: hands and feet

ex: locate and control a switch in the cockpit,

Question 8

what is mechanoreceptors

Answer 8

receptors located in the tendons

detect and relay info about the pressure / tension in a muscle.

ex: make fine adjustment to the back pressure on the control column when making a turn

Question 9

How are Proprioceptors and Mechanoreceptors used together?

Answer 9

helps the brain calculate the position and orientation of all moveable parts of the body and the amount of force exerted by limbs and digits

Question 10

what is reflex

Answer 10

when the body automates a response due to an external stimuli

you automatically withdraw when there is pain

Question 11

how does it work

Answer 11

there is no Centreal Nervous system involved

instead, the sensory nerve is connected to motor nerve in the spinal chord.

the stimulus is relayed from sensory nerve to excite action in the motor nerve