Co-ordination and Control

Question 1

Stimulus

Answer 1

Anything that we respond to in our environment.

Question 2

Co-ordinator

Answer 2

Links up receptors and effectors and decides which response will take place if any.

Question 3

Effector

Answer 3

Part of the body that produces a response e.g. muscle

Question 4

Response

Answer 4

The action taken in response to a stimulus.

Question 5

Behaviour

Answer 5

The overall total of our responses to the environment around us.

Question 6

Central nervous system

Answer 6

The brain and spinal cord.

Question 7

Neurone

Answer 7

A nerve cell.

Question 8

Sense organ

Answer 8

Special organs where receptors can be grouped together.

Question 9

Impulse

Answer 9

Information carried by a neurone as a small electrical charge.

Question 10

Synapse

Answer 10

The junction between two neurones.

Question 11

Reflex action

Answer 11

An automatic response that does not involve conscious thought.

Question 12

Reflex arc

Answer 12

The pathway of an impulse taken through the spinal cord in a relex action.

Question 13

Accommodation

Answer 13

Focusing of light rays on the retina.

Question 14

Hormone

Answer 14

A chemical message.

Question 15

Gland

Answer 15

Produces hormones.

Question 16

Target organ

Answer 16

The organ that a hormone effects.

Question 17

Homeostasis

Answer 17

Maintenance of constant state in the body.

Question 18

Insulin

Answer 18

Hormone that prevents blood glucose becoming too high.

Question 19

Negative feedback

Answer 19

Mechanism that ensures the level of something does not deviate too far from normal value.

Question 20

Diabetes

Answer 20

A condition where the body does not produce enough insulin.

Question 21

Osmoregulation

Answer 21

A homeostatic process that controls the amount of water in the blood and other body fluids.

Question 22

Phototropism

Answer 22

The response of a plant to light.

Question 23

Auxin

Answer 23

Hormone that controls phototropism.

Question 24

Cell elongation

Answer 24

Cells becoming longer.