Topic 2- Co-ordination And Control

Question 1

Auxin

Answer 1

A plant hormone that controls the responses of plants to light (phototropism) and to gravity (gravitropism)

Question 2

Pituitary gland

Answer 2

A small gland in the brain which produces a range of hormones controlling body functions.

Question 3

CNS

Answer 3

Central nervous system. Made up of the brain and spinal cord where information is processed.

Question 4

Receptor

Answer 4

Special sensory cell that detects changes in the environment.

Question 5

Effector organ

Answer 5

Muscle and gland that responds to impulses from the nervous system.

Question 6

FSH

Answer 6

Follicle stimulating hormone, a female hormone that stimulates the eggs to mature in the ovaries and the ovaries to produce hormones, including oestrogen.

Question 7

Period

Answer 7

The stage in the me stop cycle when the lining of the womb is lost.

Question 8

Urine

Answer 8

The liquid produced by the kidneys containing the metabolic product urea along with excess water and salts from the body.

Question 9

Urea

Answer 9

The chemical produced by the breakdown of the amino acids in the liver which is removed by the kidneys.

Question 10

Synapse

Answer 10

The gap between neurons where the transmission of information is chemical rather than electrical.

Question 11

Stomata

Answer 11

Openings in the of plants (particularly the underside) which allow gases to enter and leave the leaf. They are opened and closed by the guard cells.

Question 12

Progesterone

Answer 12

Female sex hormone used in the contraceptive pill.

Question 13

Puberty

Answer 13

The stage of development when the sexual organs and the body become adult.

Question 14

Gravitropism

Answer 14

Response of a plant to the force of gravity controlled by auxin.

Question 15

Homeostasis

Answer 15

The maintenance of constant internal body conditions.

Question 16

Stimuli

Answer 16

A change in environment that is detected by sensory receptors.

Question 17

Impulse

Answer 17

Electrical signal carried along the neurons.

Question 18

Reflex

Answer 18

Rapid automatic response of the nervous system that does not involve conscious thought.

Question 19

Neuron

Answer 19

Basic cell of the nervous system which carries minute electrical impulses around the body.

Question 20

Sensory neuron

Answer 20

Neuron which carries impulses from the sensory organs to the central nervous system.

Question 21

Ovaries

Answer 21

Female sex organs which contain the eggs and produce sex hormones during the menstrual cycle.

Question 22

Ovulation

Answer 22

The release of a mature egg from the ovary in the middle of the menstrual cycle.

Question 23

Phototropism

Answer 23

The response of a plant to light, controlled by the auxin.

Question 24

Internal environment

Answer 24

The conditions inside the body.

Question 25

Kidney

Answer 25

Organ which filters the blood and removes urea,excess salts and water.

Question 26

Menstrual cycle

Answer 26

The reproductive cycle in women controlled by hormones.

Question 27

Motor neurone

Answer 27

Neuron that carries impulses from the central nervous system to the effects or organs.

Question 28

Nerve

Answer 28

Bundle of hundreds or even thousands of neurons.

Question 29

Nervous system

Answer 29

See central nervous system

Question 30

Oestrogen

Answer 30

Female sex hormone which stimulates the lining of the womb to gulf up in preparation for a pregnancy.

Question 31

Oral contraceptive

Answer 31

Hormone contraceptive that is taken by the mouth.

Question 32

Pancreas

Answer 32

An organ that produces the Horne insulin and many digestive enzymes.

Question 33

Reflex arc

Answer 33

The sense organ, sensory neuron, relay neuron, motor neuron and effector organ which bring about a reflex action.