Coordination and Response (Eye & Nerve best done with diagram)

Question 1

Accommodation

Answer 1

Adjustments made by the eye to produce a clear image on the retina

Question 2

ADH

Answer 2

A hormone produced by the pituitary gland which is involved in control of water levels in the body, makes the collecting duct in the kidneys more permeable to water so more water is reabsorbed from the urine back into the blood.

Question 3

Auxin

Answer 3

Plant growth factor involved in control of cell elongation

Question 4

Brain

Answer 4

The organ which coordinates the activities of the nervous system. Part of the Central Nervous System.

Question 5

CNS

Answer 5

Central Nervous System - brain and spinal cord

Question 6

Diabetes

Answer 6

Disease where blood glucose concentration cannot be controlled properly

Question 7

Ectotherm

Answer 7

A cold blooded organism (uses the environment to control its body temperature)

Question 8

Effector

Answer 8

Causes a response or change when stimulated by a nerve impulse

Question 9

Endocrine

Answer 9

A gland which secretes a hormone into the blood

Question 10

Endotherm

Answer 10

A warm blooded organism (maintains its body temperature using physiological mechanisms)

Question 11

Exocrine

Answer 11

A gland which secretes a hormone into a duct which leaves the body e.g. salivary gland

Question 12

Geotropism

Answer 12

The directional growth of a plant in response to gravity

Question 13

Gland

Answer 13

A group of cells which secrete a particular substance

Question 14

Glucagon

Answer 14

A hormone produced by the pancreas that acts to increase blood sugar

Question 15

Glycogen

Answer 15

Excess glucose in the body is converted to glycogen for storage to be used at a later date.

Question 16

Homeostasis

Answer 16

Maintaining a constant level of substances and constant conditions in the body.

Question 17

Hormone

Answer 17

A substance that is transported in the blood and acts as a chemical messenger

Question 18

Impulses

Answer 18

An electrical signal transmited along a neurone

Question 19

Insulin

Answer 19

A hormone produced by the pancrease that acts to decrease blood sugar

Question 20

Motor neurone

Answer 20

Nerve cell that transmits impulses from the CNS to the effector

Question 21

Neurone

Answer 21

A nerve cell - there are three types - sensory, motor and relay

Question 22

Neurotransmitter

Answer 22

When a nerve impulse reaches the dendrite at the end of the axon, chemical messengers called neurotransmitters are released and diffuse across the synapse (gap between the two neurons) and binds to the next neuron.

Question 23

Phototropism

Answer 23

Growth of a plant towards light

Question 24

Receptor

Answer 24

A cells which detects stimuli (a change in its environment)

Question 25

Reflex

Answer 25

A simple behaviour involving a rapid, automatic response to a stimuli

Question 26

Reflex arc

Answer 26

The nervous pathway associated with a reflex

Question 27

Response

Answer 27

An action from the body caused by a stimulus

Question 28

Sensory neurone

Answer 28

Neurone that transmits impulses form the receptor to the CNS

Question 29

Stimulus

Answer 29

A detectable change in the environment which generates a response

Question 30

Synapse

Answer 30

A junction between nerve cells

Question 31

Tropism

Answer 31

The growth of a plant towards or away from a stimulus

Question 32

Vasoconstriction

Answer 32

decreasing the diameter of small arteries

Question 33

Vasodilation

Answer 33

Increasing the diameter of small arteries