coordination and response igcse

Which type of cells do all sense organs contain?

• ciliated

• effector

• mesophyll

• receptor

The diagram shows a section through part of the human eye.

When a person looks at an object which is close to their eye, which of the following takes place?

• suspensory ligaments slacken; lens becomes fatter

• suspensory ligaments slacken; lens becomes thinner

• suspensory ligaments tighten; lens becomes fatter

• suspensory ligaments tighten; lens becomes thinner

A bright light suddenly shines into a person’s eyes.

What happens?

• The lenses become more concave.

• The lenses become more convex.

• The pupils become larger.

• The pupils become smaller.

Tags

NGSS.HS-LS1-3

When a person is frightened, adrenalin is released by the adrenal glands.

What are the effects of the adrenalin?

• breathing rate decreased; heart beat rate decreased

• breathing rate decreased; heart beat rate increased

• breathing rate increased; heart beat rate decreased

• breathing rate increased; heart beat rate increased

Tags

NGSS.HS-LS1-3

The diagram shows the human nervous system.

Which letter indicates a part of the central nervous system?

• A

• B

• C

• D

The diagram shows the muscles which control the size of the pupil in an eye.

How do the muscles make the pupil larger?

• circular muscles contract; radial muscles contract.

• circular muscles contract; radial muscles relax.

• circular muscles relax; radial muscles contract.

• circular muscles relax; radial muscles relax.

Which list describes the correct sequence of a simple reflex arc?

• A receptor, relay neurone, motor neurone, sensory neurone, effector

• B receptor, relay neurone, sensory neurone, motor neurone, effector

• C receptor, sensory neurone, motor neurone, relay neurone, effector

• D receptor, sensory neurone, relay neurone, motor neurone, effector

The diagram shows a simple reflex arc.

Which labelled part is the sensory neurone?

• A

• B

• C

• D

Tags

NGSS.MS-LS1-3

Some structures in the eye are listed.

1 cornea

2 iris

3 lens

4 retina

Which structures contain light receptors?

• 1, 2 and 3

• 2, 3 and 4

• 2 and 4 only

• 4 only

What is CNS?

• Central Neurone System

• Brain and spinal cord

• Peripheral neurones

• Synapses that connect neurones