B1 Control of the human body: Keywords

Question 1

What is a stimulus?

Answer 1

Change that brings about a response eg. temperature change.

Question 2

What is the central nervous system(CNS)?`

Answer 2

The brain and spinal cord.

Question 3

What is the receptor?

Answer 3

Organs or cells that are sensitive to external stimuli.

Question 4

What is the peripheral nervous system(PNS)?

Answer 4

The nerves that carry impulses from the CNS.

Question 5

What is a neurone?

Answer 5

A cell specialized to transmit electrical nerve impulses and so carry information from one part of the body to another.

Question 6

What is a reflex action?

Answer 6

Rapid involuntary response to a particular stimulus.

Question 7

What is a synapse?

Answer 7

A junction of two nerve cells.

Question 8

What is a effector?

Answer 8

An organ or cell that brings about a response to a stimulus.

Question 9

What is a hormone?

Answer 9

A chemical, produced by one part of an organism, that controls a process in another part of an organism.

Question 10

What is a secrete?

Answer 10

???

Question 11

What is a gland?

Answer 11

Small organs controlling bodily functions by chemical means.

Question 12

What is a target organ?

Answer 12

A specific organ on which a hormone, drug or other substance acts.

Question 13

What are sex hormones?

Answer 13

A hormone, such as oestrogen or testosterone, affecting sexual reproduction or development.

Question 14

What is oestrogen?

Answer 14

A female hormone that causes development and change in the reproductive organs.

Question 15

What is progesterone?

Answer 15

A female hormone that causes the womb to prepare for pregnancy.

Question 16

What is an ion?

Answer 16

An atom or small group of atoms that has an electrical charge because it has lost or added one or more electrons.

Question 17

What is the menstrual cycle?

Answer 17

The process of ovulation and menstruation in woman and other female primates.

Question 18

What is FSH?

Answer 18

(Follicle Stimulating Hormone) A naturally occuring hormone that can be produced chemically and used in fertility treatment.

Question 19

What is LH?

Answer 19

(Luteinizing Hormone) A hormone that makes woman produce eggs and males produce testosterone.

Question 20

What is contraception?

Answer 20

The use of various methods intended to prevent a woman becoming pregnant.

Question 21

What is ovulation?

Answer 21

The time when a woman or female animal produces eggs.

Question 22

What is a drug?

Answer 22

Any natural or artificially made chemical that is used as a medicine.

Question 23

What is addiction?

Answer 23

The need or strong desire to do or to have something.

Question 24

What is withdrawal symptoms?

Answer 24

The unpleaseant physical and mental effects that result when you stop doing or taking something, especially drugs, that has become a habit.

Question 25

What is tropism?

Answer 25

The fact of living things turning towards or away from something, for example light.

Question 26

What is a auxin?

Answer 26

A chemical substance that controls growth in plants.