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Biology for IGCSE & O level - Coordination And Response (Section 5)

1
Which structures are involved in the sense of hearing?
Answer
A
C
2
Which of the following describes the main function of the lens?
Answer
(B)
To focus light onto the retina
3
Which structures are involved in the process of seeing?
Answer
A
B
C
4
What happens when a plant stem is exposed to light from only one direction?
Answer
(B)
It grows towards the light.
5
Which part of the eye controls the size of the pupil?
Answer
(B)
The iris
6
Which part of a plant is involved in phototropism?
Answer
(B)
The stem
7
Which structure is responsible for producing the aqueous humor?
Answer
(B)
Ciliary body
8
Which division of the nervous system controls involuntary actions of the body?
Answer
(B)
Autonomic nervous system
9
Which of the following is an example of a hormone?
Answer
(B)
Adrenaline.
10
Which of the following statements is true about the nervous and endocrine systems working together?
Answer
(D)
They coordinate responses to maintain homeostasis.
11
What structure facilitates the transmission of impulses across a synapse?
Answer
(C)
Neurotransmitter
12
Which statement best describes the role of insulin in the body?
Answer
(C)
Insulin helps cells take up glucose from the blood.
13
What is the role of the liver in glucose regulation?
Answer
(B)
The liver stores and releases glucose.
14
What term describes the growth of a plant in response to gravity?
Answer
(B)
Geotropism
15
What is the role of the axon terminal?
Answer
(B)
To release neurotransmitters
16
How does the body react when it's too hot, and what is this process called?
Answer
(B)
Sweating; thermolysis.
17
Which of the following is an example of negative feedback?
Answer
(A)
The increase in blood glucose after a meal causing the release of insulin, which then causes glucose levels to decrease.
18
What is a synapse?
Answer
(B)
The space between two neurons where chemical transmission occurs
19
What is the function of the iris?
Answer
(B)
To control the amount of light entering the eye
20
What does a plant do to increase the chances of pollination?
Answer
(A)
Exhibit positive phototropism
21
Which of the following is the main function of the cerebrum?
Answer
(C)
Higher-level cognitive functions
22
Which of the following is an example of a voluntary action?
Answer
(D)
Reading a book
23
Which plant hormone is primarily responsible for cell elongation?
Answer
(C)
Auxin
24
What type of plant response causes a stem to grow towards light?
Answer
(C)
Positive phototropism
25
What is the function of neurotransmitters?
Answer
(C)
To carry the impulse across the synaptic cleft
26
What is the primary function of the motor neurons?
Answer
(A)
To transmit impulses to muscles and glands.
27
Which of the following correctly describes accommodation?
Answer
(B)
The process of the lens changing shape to focus on objects at different distances.
28
What substance is released to transmit a signal across the synapse?
Answer
(C)
Neurotransmitter
29
What is the function of the retina?
Answer
(C)
To detect light and generate electrical signals.
30
Which part of a neuron transmits signals away from the cell body?
Answer
(B)
Axon
31
Which of the following is the correct pathway of a negative feedback loop?
Answer
(A)
Stimulus -> Receptor -> Effector -> Response
32
What is the role of hormones in the body?
Answer
(B)
To regulate body functions.
33
What process describes a plant's response to gravity?
Answer
(B)
Geotropism
34
Which part of the brain processes visual information?
Answer
(A)
Cerebrum
35
What is the function of the choroid in the eye?
Answer
(B)
To provide nutrients and remove waste products
36
What is vasodilation?
Answer
(B)
The dilation of blood vessels.
37
Which part of the eye is responsible for focusing light onto the retina?
Answer
(C)
Lens
38
Which structure is responsible for the blind spot in the eye?
Answer
(B)
Optic nerve
39
What is a target organ?
Answer
(A)
An organ that receives hormones.
40
What is the location of the sensory neurons?
Answer
(A)
Peripheral Nervous System
41
What structure in the eye controls the amount of light entering?
Answer
(B)
Pupil
42
What are the components of the central nervous system?
Answer
(B)
Brain and spinal cord
43
What is the function of the iris?
Answer
(B)
To control the amount of light entering the eye.
44
Which of the following processes is directly involved in helping the body lose heat?
Answer
(C)
Sweating
45
What is the primary function of the lens?
Answer
(A)
To refract light onto the retina
46
What are the benefits of positive phototropism for a plant?
Answer
A
B
47
Which part of the brain is primarily responsible for visual processing?
Answer
(B)
Cerebrum (specifically the occipital lobe)
48
What is the function of the rods in the retina?
Answer
(C)
Vision in dim light
49
Which part of the neuron receives signals from other neurons?
Answer
(B)
Dendrites
50
What is the name of the nerve that transmits visual information from the eye to the brain?
Answer
(A)
Optic nerve