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Class X-Control and Coordination-Vasu Classes
1.
Electrical impulse travels in a neuron from
a) Dendrite → cell body → axon → axonal end
b) Cell body → dendrite → axon → axonal end
c) Dendrite → axon → axonal end → cell body
d) Axonal end → axon → cell body → dendrite
2.
In a synapse, a chemical signal is transmitted from
a) dendritic end of one neuron to axonal end of another neuron
b) axonal end of one neuron to dendritic end of another neuron
c) cell body to axonal end of the same neuron
d) none of these
3.
Which is the correct sequence of the components of a reflex arc?
a) Receptors→ Muscles→ Sensory neuron→ Motor neuron→ Spinal cord
b) Receptors→ Motor neuron → Spinal cord → Sensory neuron → Muscle
c) Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle
d) Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
4.
Posture and balance of the body is controlled by
a) cerebellum
b) cerebrum
c) medulla
d) pons
5.
The movement of shoot towards light is
a) phototropism
b) hydrotropism
c) geotropism
d) chemotropism
6.
The main function of abscisic acid in plants is to
a) inhibit growth
b) promote the growth of stem
c) promote cell division
d) increase the length of cells
7.
Which of the following is not associated with the growth of a plant?
a) Gibberellins
b) Abscisic acid
c) Cytokinins
d) Auxin
8.
Iodine is necessary for the synthesis of which hormone?
a) Thyroxin
b) Adrenaline
c) Auxin
d) Insulin
9.
Select the mismatched pair.
a) Adrenaline: Pituitary gland
b) Testosterone: Testes
c) Estrogen : Ovary
d) Thyroxin: Thyroid gland
10.
The growth of pollen tubes towards ovules is due to
a) hydrotropism
b) chemotropism
c) geotropism
d) phototropism
11.
Roots of plants are:
a) positively geotropic
b) negatively geotropic
c) positively phototropic
d) none of these
12.
A microscopic gap between a pair of adjacent neurons over which nerve impulses pass is called
a) synapse
b) axon
c) dendrites
d) neurotransmitters
13.
Breathing is controlled by which part of the brain?
a) Cerebrum
b) Medulla oblongata
c) Cerebellum
d) None of these
14.
What is the function of pituitary gland?
a) to develop sex organs in males
b) to stimulate growth in all organs
c) to regulate sugar and salt level in the body
d) to initiate metabolism in the body
15.
In a neuron, conversion of electric signal to chemical reaction occurs at ______.
a) cell body
b) dendritic end
c) axonal terminals
d) none of these
16.
The substance that triggers the fall of mature leaves and fruits from plants is ____.
a) Cytokinin
b) Abscisic acid
c) Gibberellin
d) Auxin
17.
Choose incorrect statement about insulin.
a) It is produced by pancreas
b) it regulates the growth and development of body
c) it regulates blood sugar level
d) deficiency causes diabetes
18.
Spinal cord originates from
a) medulla
b) cerebrum
c) cerebellum
d) pons
19.
Select the mis-matched pair:
a) Thyroxin : Thyroid gland
b) Adrenaline : Pituitary gland
c) Testosterone : Testes
d) Estrogen : Ovary
20.
The movement of sunflower in accordance with the path of Sun is due to
a) phototropism
b) chemotropism
c) geotropism
d) hydrotropism
21.
When a person is suffering from severe cold, he or she cannot
a) differentiate red light from green light
b) differentiate a hot object from a cold object
c) differentiate the smell of a perfume from that of an agarbatti
differentiate the smell of a perfume from that of an agarbatti
d) differentiate the taste of an apple from that of an ice cream
22.
In humans, the life processes are controlled and regulated by
a) reproductive and endocrine systems
b) respiratory and nervous systems
c) endocrine and digestive systems
d) nervous and endocrine systems
23.
A big tree falls in a forest, but its roots are still in contact with the soil. The branches of this fallen tree grow straight up (vertically). This happens in response to:
a) Light and gravity
b) Gravity and water
c) Water and minerals
d) Water and light
24.
The stimulus in the process of thigmotropism is:
a) Light
b) Touch
c) Chemical
d) Water
25.
A growing seedling is kept in a dark room. A burning lamp is placed near to it for a few days. The top part of seedling bends towards the burning candle. This is an example of
a) Geotropism
b) Phototropism
c) Hydrotropism
d) None of these
26.
Which of the following controls the involuntary actions in the body?
a) Medulla in hindbrain
b) Medulla in spinal cord
c) Medulla in forebrain
d) Medulla in midbrain
27.
A part of the body which responds to the instructions sent from nervous system is called
a) receptors
b) nerves
c) muscles
d) effector
28.
A student accidentally places her hand on a flame of candle and quickly pulls her hand away. The flame represents
a) a response
b) a stimulus
c) an impulse
d) an effector
29.
Assertion: Brain is a delicate organ which is protected from injury.
Reason: The bony box protects the brain from any shock.
a) Assertion is true but the Reason is false.
b) The statement of the Assertion is false but the Reason is true.
c) The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.
d) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.
30.
The brain is responsible for:
a) balancing the body
b) thinking
c) regulating the heart beat
d) all of these
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