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Biology > B1 Control of the human body: Keywords > Flashcards

B1 Control of the human body: Keywords Flashcards

1
Q

What is a stimulus?

A

Change that brings about a response eg. temperature change.

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2
Q

What is the central nervous system(CNS)?`

A

The brain and spinal cord.

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3
Q

What is the receptor?

A

Organs or cells that are sensitive to external stimuli.

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4
Q

What is the peripheral nervous system(PNS)?

A

The nerves that carry impulses from the CNS.

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5
Q

What is a neurone?

A

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

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6
Q

What is a reflex action?

A

Rapid involuntary response to a particular stimulus.

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7
Q

What is a synapse?

A

A junction of two nerve cells.

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8
Q

What is a effector?

A

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

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9
Q

What is a hormone?

A

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

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10
Q

What is a secrete?

A

???

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11
Q

What is a gland?

A

Small organs controlling bodily functions by chemical means.

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12
Q

What is a target organ?

A

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

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13
Q

What are sex hormones?

A

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

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14
Q

What is oestrogen?

A

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

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15
Q

What is progesterone?

A

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

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16
Q

What is an ion?

A

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

17
Q

What is the menstrual cycle?

A

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

18
Q

What is FSH?

A

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

19
Q

What is LH?

A

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

20
Q

What is contraception?

A

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

21
Q

What is ovulation?

A

The time when a woman or female animal produces eggs.

22
Q

What is a drug?

A

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

23
Q

What is addiction?

A

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

24
Q

What is withdrawal symptoms?

A

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

25
Q

What is tropism?

A

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

26
Q

What is a auxin?

A

A chemical substance that controls growth in plants.

Biology (6 decks)

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