IGCSE Topic 14 Coordination and Response

Which type of cells do all sense organs contain?

• ciliated

• effector

• mesophyll

• receptor

The diagram shows a cell.

What type of cell is shown?

• ciliated cell

• motor neurone

• relay neurone

• sensory neurone

When a bright light is shone into the eye, the diameter of the pupil decreases.

What is this an example of?

• accommodation

• a simple reflex

• photosynthesis

• voluntary response

The diagram shows a neurone carrying an impulse.

Which row describes the type of neurone and the direction of impulse?

Which choice describes the type of neurone and the direction of impulse?

• type of neurone = motor; direction of impulse = towards the spinal cord

• type of neurone = motor; direction of impulse = away from the spinal cord

• type of neurone = sensory; direction of impulse = towards the spinal cord

• type of neurone = sensory; direction of impulse = away from the spinal cord

The diagram shows some of the muscles and bones of the human arm.

When muscle X contracts, what happens to the arm and what happens to muscle Y?

• arm bends; muscle Y contracts

• arm bends; muscle Y relaxes

• arm straightens; muscle Y contracts

• arm straightens; muscle Y relaxes

Tags

NGSS.MS-PS2-1

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.