The Nervous System

Question 1

2 main components of the nervous system

Answer 1

• central nervous system
• peripheral nervous system

Question 2

What is the function of the central nervous system

Answer 2

• be able to send messages to the muscles and glands of the body
• is the brain and spinal cord

Question 3

Function of the peripheral nervous system

Answer 3

• relay nerve impulses from the central nervous system and to the rest of the body

Question 4

What is the function of the brain

Answer 4

The part of the CNS that is responsible for coordinating sensation, intellectual and nervous activity

Question 5

What is the function of the spinal cord

Answer 5

A bundle of nerve fibres enclosed within the spinal column and which connects nearly all parts of the body with the brain

Question 6

What two parts is the peripheral nervous system divided into

Answer 6

• somatic nervous system
• autonomic nervous system

Question 7

What is the somatic nervous system

Answer 7

The part of the peripheral nervous system responsible for carrying sensory and motor information to and from the CNS

Question 8

What is the autonomic nervous system

Answer 8

It governs the brain involuntary activities ( stress, heartbeat) and is self regulating
Divided into the symapathetic branch (fight or flight) and parasympathetic branch (rest and digest)

Question 9

The autonomic system is divided into two parts called :

Answer 9

• sympathetic nervous system
• parasympathetic nervous system

Question 10

What does the sympathetic nervous system do

Answer 10

• regulates homeostasis and investigates flight or fight response
• during times of stress it can dilate the pupils, elevate hear rate and increase sweating

Question 11

What does the parasympathetic nervous system do

Answer 11

• controls bodily functions when a person is at rest

Question 12

What is the sensory neuron

Answer 12

In peripheral nervous system - carry information from receptors to the brain
- convey information about sensory stimuli (touch, taste) towards the brain

Question 13

One difference between the autonomic nervous system and the somatic nervous system

Answer 13

• the autonomic nervous system is involuntary wheras the somatic nervous system is under the conscious mind

Question 14

Outline the function of the endocrine system using an example of a gland and hormone

Answer 14

• the endocrine system helps to regulate the activity of cells and organs in the body
  It communicates chemical messages to the organs of the body
• the pancreas secretes insulin and glucagon which helps regulate blood sugar levels

Question 15

Defences between infradian and ultradian rhythms

Answer 15

The infradian occurs over 24 hours and the ultradian cycles last less than 24 hours

Question 16

One similarity and difference between FMRIs and ERPs

Answer 16

• one similarity is that they are non invasive and do not use radiation
• one difference is that FMRIs are more expensive than ERPs
  And FMRIs have poor temporal resolution where ERPs have good temporal resolution

Question 17

Similarity’s and differences between the endocrine system and nervous system

Answer 17

• similarity - both carry messages in the body
• both involved in fight or flight response to stress

Differences - nervous system sends messages in chemical and electrical form via neurons whereas endocrine system in chemical messages in the blood
- nervous system is much quicker to transmit messages, hormonal changes are sower than nerve impulses

Question 18

What is the nervous system

Answer 18

The nervous system is a specialised network of cells in the human body and is our primary internal communication system
It is based on electrical and chemical signals