Topic 2: Nervous System

Question 1

Sense Organs

Answer 1

Specialised structure used to detect stimuli in the surrounding environment

Question 2

Stimuli

Answer 2

Changes in the environment that can be detected and responded too

Question 3

Thermoreceptors

Answer 3

Special cells located in your skin, part of your brain and body core that are sensitive to temperature

Question 4

Mechanoreceptors

Answer 4

Special cells within the skin, inner ear and skeletal muscles that are sensitive to touch, pressure and motion, enabling you to balance, hear and sense pressure and movement

Question 5

Chemoreceptors

Answer 5

Special cells within a sense organ (especially the nose and tastebuds) that are sensitive to particular chemicals, giving you the sensations of smell and taste

Question 6

Photoreceptors

Answer 6

A receptor cell located in your eye that is stimulated by light, converting it to electrical energy that is sent to the brain, giving you the sensation of light

Question 7

Pain Receptors

Answer 7

Special cells located throughout the body (except the brain) that send nerve signals to the brain and spinal cord in the presence of damaged or potentially damaged cells, resulting in the sensation of pain

Question 8

Hot Thermoreceptors

Answer 8

A type of receptor in your skin that can detect an increase in skin temperature above 37.5°C (normal body temperature)

Question 9

Cold Thermoreceptors

Answer 9

A type of receptor in your skin that can detect a decrease in skin temperature below 35.8 °C

Question 10

Olfactory Nerve

Answer 10

Nerve that sends signals to the brain from the chemoreceptors in the nose

Question 11

Pupil

Answer 11

A hole through which light enters the eye