Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

IGCSE BIOLOGY MATS > 2j - Coordination and response > Flashcards

2j - Coordination and response Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What is the function of a receptor?

A

Detecting stimuli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the function of ‘homeostasis’?

A

Maintaining a constant internal environment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the function of the coordination centre?

A

Receives and processes the information from receptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the function of the effector cells?

A

Brings the required response

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a stimuli?

A

A change in the internal or external environement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a positive tropism?

A

The movement or growth towards a stimulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a negative tropism?

A

The movement or growth towards away from a stimulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the name of the tropism involving light as the stimuli?

A

phototropism

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the name of the tropism involving gravity as the stimuli?

A

geotropic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The roots of a plant are : (tropisms)

A

positively geotropic negative phototropic (grow away from light)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The shoots of a plant are : (tropisms)

A

positively phototropic negatively geotropic (grow towards light)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Where is auxin made?

A

In the tips of growing stems and roots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

If light shines on the shoot, where does the auxin move to?

A

It concentrates and moves to the shaded side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What causes the plant to grow towards light?

A

The uneven growth on either side of the shoot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What happens if the tip of a seedling is removed?

A

No auxin is produced, and therefore the plant wont grow anymore

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What happens if no light reaches the tip of the shoot?

A

The shoot will grow evenly (upwards) as the concentration of auxin is the same on either side of the shoot

17
Q

What is the name given to gaps along neurones?

A

Synapses

18
Q

What is the chemical messenger called which releases from the nerve-ending of the neuron?

A

Neurotransmitter

19
Q

What do synapses ensure?

A

That impulses only travel in one direction

20
Q

What cells convert a stimulus into an electrical impulse?

A

Receptor cells

21
Q

What does a sensory neurone do?

A

It sends an impulse along to the CNS

22
Q

What happens after an impulse has been sent to the CNS?

A

An electrical impulse is sent along motor neurons to effectors which carry out the response

23
Q

What is the function of an effector neurone?

A

Carry out the response (eg. contract muscle)

24
Q

What happens to the eye when focusing on a close object?

A

1) Ciliary muscles contract 2) Suspensory ligaments loosen 3) Lens becomes fatter and more refraction occurs

25
Q

What happens to the eye when focusing on a distant object?

A

1) Ciliary muscles contract 2) Suspensory ligaments tighten 3) Lens becomes thinner and less refraction occurs

26
Q

What happens to the eye in dim light?

A

1) Radial muscles contract
2) Circular muscles relax
3) Pupil dilutes and lets in more light

27
Q

What happens to the eye in bright light?

A

1) Radial muscles contract
2) Circular muscles contract
3) Pupil constricts and lets in less light

28
Q

Name the structure circled in the diagram:

A

Ciliary muscle

  • Involved in changing the shape of the lens
29
Q

Name the structure circled in the diagram:

A

Cornea

  • Refracts light rays
30
Q

Name the structure circled in the diagram:

A

Fovea

  • Area of retina that provides clearest vision
31
Q

Name the structure circled in the diagram:

A

Iris

  • Regulates amount of light entering pupil
32
Q

Name the structure circled in the diagram:

A

Lens

  • Focuses light on the retina
33
Q

Name the structure circled in the diagram:

A

Optic nerve

  • Carries impulses from eye to brain
34
Q

Name the structure circled in the diagram:

A

Pupil

  • Hole allowing light to enter
35
Q

Name the structure circled in the diagram:

A

Retina

  • Contains the light receptors
36
Q

Name the structure circled in the diagram:

A

Suspensory ligaments

  • Hold lens in place and involved in changing shape of lens

IGCSE BIOLOGY MATS (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions