Nervous System

Question 1

Define Stimulus.

Answer 1

Any perceptual changes in the environment that effects the body systems

Question 2

What are the three functions of the nervous system?

Answer 2

Sensation - detect stimuli
Interpretation - translate sensory info and decide a response.
Reaction - perform a reaction

Question 3

What are the main difference and similarities between the endocrine system and the nervous system?

Answer 3

The nervous system is wired, rapid and brief

The endocrine system is hormonal, slow and lengthy

Question 4

What are the two primary nervous systems?

Answer 4

Central Nervous System

Pheripheral Nervous System

Question 5

The central nervous system is made up by 2 main components. What are they?

Answer 5

Brain and Spinal cord.

Question 6

The spinal cord is broken up into 4 regions, what are these regions?

Answer 6

Cervical
Thoracic
Lumbar
Sacral

Question 7

The pheripheral nervous system is spilt into two further systems. What are these and what do they control?

Answer 7

Somatic Nervous System - controls volentary movement

Autonomic Nervous System - Controls involentary movement.

Question 8

What is a neurons cell body called?

Answer 8

Soma

Question 9

What is the name of the input area of the neuron?

Answer 9

Dendrites

Question 10

What is the long thin transmitter area of the Neuron?

Answer 10

Axon

Question 11

What covers the Axon on a sensory and motor neuron and what is its function?

Answer 11

Myelin Sheath. It is there to act as a conductor which will speed up transmission.

Question 12

What is the name of the cells wrapped around the Axon?

Answer 12

Schwann cells. They are wrapped tightly around the axon - upto 10 times.

Question 13

The peripheral nervous system is made up of three types of neurons. What are the names of these neurons?

Answer 13

Motor neurons
Interneurons
Sensory neurons

Question 14

What are the gaps between the Schwann cells called and what is there function?

Answer 14

Nodes of Ranvier - they allow for quicker relay of the signal. Jumping is quicker than walking.

Question 15

The Reflex Arc is part of what nervous system?

Answer 15

Automatic Nervous System

Question 16

What are the 5 steps involved in the Reflex Arc

Answer 16

1 - Stimulus
2 - Receptor 
3 - Co-coordinator
4 - Effector
5 - Response

Question 17

Which neuron doesn’t have dendrites?

Answer 17

The Sensory neuron

Question 18

The autonomic Nervous System is divided into 2 sub groups what are these and what do they responsible for?

Answer 18

Sympathetic Motor System - Fight or Flight

Parasympathetic Motor System - Chill out.