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Year 8 study decks > Biology > Flashcards

Biology Flashcards

1
Q

What is the cornea (eye)

A

A clear tough contacting on the front of the eye which refracts (bends) light

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2
Q

What is the iris (eye)

A

The coloured part of the eye, a muscle. It controls how much light enters the pupil.

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3
Q

What is the lens (eye)

A

Flexible structures that change shape to focus light onto the retina

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3
Q

What is the Pupil (eye)

A

Allows light into the eye. Dilates (gets larger) in dim light, constricts (gets smaller) in bright light

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4
Q

What is the retina (eye)

A

Contains millions of nerve cells which set electrical signals when light strikes them, the receptors are called rods and cones

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5
Q

What is the blind spot in your eye? (Eye)

A

A point where nerves are missing the fibres. The retina enters the opticnevere here

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6
Q

What is the optic nerve in the eye? (The eye)

A

It carries impulses from the retina to the brain co-ordinatior

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7
Q

What is a Stimulus (senses)

A

A change in environment

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8
Q

What is a receptor (senses)

A

Many different types senses eg, light,sound, touch

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9
Q

What is an coordinator (senses)

A

Brain or spinal cord

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10
Q

What is an effector (senses)

A

Muscle or gland

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11
Q

What is a Response (senses)

A

An action in reaction to a stimulus

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12
Q

What is humour (eye)

A

Liquid in the eye

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13
Q

What is the nerve in ear? (Ear)

A

Auditory nerve

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13
Q

How many main layers is the skin made up of? (Touch)

A

3

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14
Q

What do receptors in the skin do? (Touch)

A

It has many different receptors that detect pain pressure and temperature

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15
Q

What does the skin contain? (Touch)

A

Sweat glands, hair, hair follicles, erector muscle and blood vessels

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16
Q

Where is the cerembellum located? (Brain)

A

In the bottom back of the brain

17
Q

Where is the medulla located? (Brain)

A

The straight line in the bottom of the brain

17
Q

Where is the cerebrum located? (Brain)

A

The top of the brain

18
Q

What does the brain do? (Brain)

A

Controls the functions of the body and behaviour. Different areas carry out different functions.

19
Q

What does the cerebellum do? (Brain)

A

Controls movement

20
Q

What does the medulla do? (Brain)

A

Controls the unconscious activities such as heart breath and digestion

21
Q

What do3s the cerebral cortex do? (Brain)

A

Controls conscious thoughts eg: thihht intelligence memory and language

22
Q

Hwo are some people long sighted? (Eye)

A

Eyeball too short or lens too weak

23
Q

How are some people short sighted?

A

Eyeball is too long or lens too strong.

24
Q

What are receptors in the eye sensitive to? (Eye)

A

They are sensitive to light

25
Q

What are receptors in the ear sensitive to?

A

They are sensitive to sounds

26
Q

What are receptors a kind of?

A

Cells

26
Q

What does the nervous system do?

A

Allows humans to coordinate their behaviour and enable them to to react the their surrounding

27
Q

Which senses are sensitive to chemicals?

A

Tongue and nose

28
Q

Where does information from receptors go to?

A

Information from receptors passes along nerves to the brain.

29
Q

What is another word for ear drum? (Ear)

A

Tympanic membrane

30
Q

What is the tube in ear called? (Ear)

A

Eustachian tube

31
Q

What is an independent variable?

A

The variable you change

32
Q

What is the dependent variable?

A

The one your measure/ record

33
Q

What is the control variable? (Ear)

A

The one you keep the same

34
Q

What are the 3 bones in the ear? (Ear)

A

Hammer anvil and stir up

35
Q

What is the outer ear called? (Ear)

A

The pinna

36
Q

What is the canal in the ear called? (Ear)

A

The ear canal

37
Q

Which part of the ear vibrates when sound is made? (Ear)

A

The ear drum

38
Q

What is the circular part in the back of the ear callled? (Ear)

A

The cohlea

39
Q

What are the canals in the ear called? (Ear)

A

The semicircular canals

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