Stimulus & Response (Mr Brown)

Question 1

Reflex

Answer 1

Very rapid, often unconscious.

Question 2

Stimulus

Answer 2

Something that sparks a response.

Question 3

Response

Answer 3

A reaction to a stimulus

Question 4

Reflex Arc

Answer 4

Stimulus ~> Receptor ~> Coordinator ~> Effector ~> Response

Question 5

Taxes

Answer 5

Direction of response is directly related to the direction in which organism is moving. (Moving closer or away from something)

Question 6

Kinesis

Answer 6

Organism responds to stimulus by moving more or moving less but not in a specific direction.

Question 7

Parasympathetic

Answer 7

Concerned with slowing things down, inhibition.

Question 8

Sympathetic Division

Answer 8

Excitatory, speeds things up.

Question 9

Rods

Answer 9

Display high visual sensitivity but low visual acuity.

Question 10

Cones

Answer 10

Display low visual sensitivity but high visual acuity.

Question 11

Visual acuity

Answer 11

The sharpness of the image produced.

Question 12

Three types of cone

Answer 12

Red, green, blue.

Question 13

Fatigue of Receptor Cells

Answer 13

The failure of response to continue.

Question 14

Exteroceptors

Answer 14

Respond to stimuli from the external environment.

Question 15

Enteroceptors

Answer 15

Respond to stimuli from the internal environment.

Question 16

Proprioceptors

Answer 16

Respond to tension within tendons and muscles.

Question 17

Sensory receptors

Answer 17

Monitor changes in either the external/internal environment.

Question 18

How do neurones communicate?

Answer 18

By means of an electrical signal called the action potential.

Question 19

Action Potential

Answer 19

A chemical disturbance that is carried along the surface membrane of the axon.

Question 20

Depolarisation

Answer 20

Action potential increasing

Question 21

Repolarisation

Answer 21

Action potential decreasing.

Question 22

Refractory Period

Answer 22

returning to the resting potential. (Less atp is used)