B10 Human Nervous System

Question 1

Homeostasis

Answer 1

Regulation of the conditions of a cell or organisms to maintain optimum condition, for function it response to changes

Question 2

What do Control System have

Answer 2

Receptors, co-ordination centres, and effectors

Question 3

Reflex actions

Answer 3

Automatic and rapid and do not involve conscious parts of the brain.

Involves sensory, relay and motor neurones.

Control everyday bodily functions

Question 4

Stages of reflex arc

Answer 4

Stimulus –> Receptor –> Sensory Neurone –> Relay Neurone –> Motor Neurone —> Effector –> Response

Question 5

Cerebral Cortex (Brain)

Answer 5

Concerned with consciousness, intelligence, memory and language

Question 6

Cerebellum (Brain)

Answer 6

Concerned with coordinating muscular activity and balance

Question 7

Medulla (Brain)

Answer 7

Concerned with unconscious activities (e.g Breathing)

Question 8

Brain

Answer 8

Made up off billions of interconnected neurones that control complex behaviour

Question 9

Eye

Answer 9

A sense organ containing receptors in the retina that are sensitive to light intensity and colour

Question 10

Cornea

Answer 10

Lets light in and refracts light towards the retina

Question 11

Iris

Answer 11

Controls the size of the pupil and amount of light entering the eye

Question 12

Optic Nerve

Answer 12

Carries impulses from the retina to the brain

Question 13

Accommodation

Answer 13

Process of the shape of the lens of the eye to focus on near or distant objects

Question 14

Nervous System

Answer 14

Uses electrical impulses to enable you to react quickly to surroundings and coordinate your behaviour

Question 15

Sclera

Answer 15

Tough and strong layer, which protects the eyeball