B10 - Human nervous system

Question 1

What is homeostasis?

Answer 1

Regulation of internal conditions of a cell or organism to maintain optimum conditions for function

Question 2

What internal conditions are controlled by homeostasis?

Answer 2

Water content
Body temperature
Blood glucose concentration

Question 3

What are receptor cells?

Answer 3

Detect stimuli in external or internal environment

Question 4

What are the coordination centres?

Answer 4

Brain
Spinal cord
Other organs like Pancreas

Question 5

What are effectors?

Answer 5

Muscles or glands that bring about a response

Question 6

Why does the nervous system use electrical impulses?

Answer 6

Enables you to react quickly to your surroundings and coordinate your behaviour

Question 7

What make up the central nervous system? (CNS)

Answer 7

Brain

Spinal cord

Question 8

How does the nervous system work?

Answer 8

Stimulus -> Receptor -> Sensory Neurone -> Coordinator (CNS) -> Motor Neurone -> Effector -> Response

Question 9

What are reflex actions?

Answer 9

Automatic and rapid. Do not involve conscious part of brain

Question 10

What everyday bodily functions do reflex actions control?

Answer 10

Breathing

Digestion

Question 11

What are the main stages of the reflex arc?

Answer 11

Stimulus -> Receptor -> Sensory Neurone -> Relay Neurone -> Motor Neurone -> Effector -> Response