B1.2

Stimulus
A change in the environment that you might need to respond to
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Receptors
They change the stimulus energy into electrical impulses
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Sense organs
Eyes, Ears, Nose, Mouth, Skin
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Central Nervous System (CNS)
Where all the information from the receptors is sent and where reflexes are coordinated
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Sensory Neurons
The nerve cells which carry impulses from the receptor to the CNS
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Relay Neurons
The nerve cells which carry impulses from sensory neurons to the motor neurons
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Motor Neurons
The nerve cells which carry impulses from the CNS to the effectors
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Synapse
The connection between two neurons
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Reflex Arcs
The process from the stimulus to the effector
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Homeostasis
The maintenance of a constant internal environment
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Insulin
A hormone which helps to maintain the right level of glucose in your blood
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Controlling water content
The skin as sweat, via the lungs in breathe, via the kidneys as urine
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Hormones
Chemical messengers which travel in the blood to activate target cells
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Glands
Where hormones are produced
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Pituitary Gland
This produce FSH and LH
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The Mestrual Cycle
The monthly cycle in which a female releases and egg and prepares the uterus in case of fertilisation
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Stage 1 of TMC
When the bleeding starts, the uterus lining breaks down
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Stage 2 of TMC
The lining of the uterus builds up again from day 4 to day 14, into a thick spongy layer of blood vessels, ready to receive a fertilised egg
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Stage 3 of TMC
An egg is released from the ovary at day 14
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Stage 4 of TMC
The wall is then maintained for about 14 days. If no fertilised egg has landed on the uterus wall by day 28 the uterus lining starts to break down again
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Follicle Stimulating Hormone (FSH)
Produced by the pituitary gland and causes the egg to mature in one of the ovaries and stimulates the ovaries to produce oestrogen
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Oestrogen
Produced in the ovaries and causes the pituitary gland to inhibit the further release of FSH and produces LH
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Luteinising (LH)
Produced by the pituitary gland and stimulates the release of an egg
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In Vitro Fertilisation (IVF)
A process that can be used to help a woman get pregnant
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Step 1 of IVF
FSH and LH are given to the woman to stimulate the maturation of eggs
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Step 2 of IVF
Eggs are then collected from the woman's ovaries
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Step 3 of IVF
The eggs are fertilised in a lab with the man's sperm
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Step 4 of IVF
The fertilised eggs then grow into embryos
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Step 5 of IVF
Once the embryos have formed, some are transferred to the woman's uterus
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Auxin
A plant hormone which controls growth near the tips of shoots and roots. It controls the plant's growth in response to different stimuli
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Phototropism
Plant growth in response to light
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Gravitopism
Plant growth in response to gravity
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Other cards in this set

Card 2

Front

They change the stimulus energy into electrical impulses

Back

Receptors

Card 3

Front

Eyes, Ears, Nose, Mouth, Skin

Back

Preview of the back of card 3

Card 4

Front

Where all the information from the receptors is sent and where reflexes are coordinated

Back

Preview of the back of card 4

Card 5

Front

The nerve cells which carry impulses from the receptor to the CNS

Back

Preview of the back of card 5
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