Vidaara.orgClass 10 · Mathematics
CodeVID-M10-WS
Control and Coordination — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
15 × 1 = 15 marks
1.
A change in the environment to which an organism responds is a:
- A.Response
- B.Stimulus
- C.Reflex
- D.Hormone
2.
The structural and functional unit of the nervous system is the:
- A.Neuron
- B.Nephron
- C.Alveolus
- D.Synapse
3.
The part of a neuron that receives impulses is the:
- A.Axon
- B.Dendrite
- C.Cell body
- D.Synapse
4.
The microscopic gap between two neurons is the:
- A.Synapse
- B.Axon
- C.Reflex arc
- D.Nerve
5.
A reflex action is mainly controlled by the:
- A.Cerebrum
- B.Spinal cord
- C.Cerebellum
- D.Pancreas
6.
The largest part of the human brain, responsible for thinking, is the:
- A.Cerebellum
- B.Medulla
- C.Cerebrum
- D.Pons
7.
Balance and posture of the body are controlled by the:
- A.Cerebrum
- B.Cerebellum
- C.Medulla
- D.Spinal cord
8.
Heartbeat and breathing are controlled by the:
- A.Cerebrum
- B.Cerebellum
- C.Medulla
- D.Dendrites
9.
Plants coordinate their responses using:
- A.A brain
- B.Nerves
- C.Chemical hormones
- D.A spinal cord
10.
Roots growing downward into the soil is an example of:
- A.Phototropism
- B.Geotropism
- C.Hydrotropism
- D.Nastic movement
11.
The plant hormone responsible for phototropism is:
- A.Insulin
- B.Auxin
- C.Adrenaline
- D.Thyroxine
12.
Endocrine glands secrete hormones directly into the:
- A.Stomach
- B.Blood
- C.Lungs
- D.Nerves
13.
Insulin, which controls blood sugar, is secreted by the:
- A.Thyroid
- B.Pancreas
- C.Adrenal gland
- D.Pituitary
14.
Goitre is caused by the deficiency of:
- A.Iodine (for thyroxine)
- B.Insulin
- C.Auxin
- D.Adrenaline
15.
Compared with nervous control, hormonal control is:
- A.Faster but short-lived
- B.Slower but longer-lasting
- C.Exactly the same
- D.Not used in the body
Section B — Challenge / Olympiad (2 marks each)
6 × 2 = 12 marks
16.
In a reflex like pulling away from a pin-prick, the brain learns about the event only AFTER the hand is withdrawn because:
- A.The spinal cord handles the reflex quickly, then informs the brain
- B.The brain is switched off
- C.There are no nerves to the brain
- D.Reflexes never reach the brain
17.
Auxin causes a shoot to bend towards light because it:
- A.Collects on the shaded side and makes those cells grow longer
- B.Stops all growth
- C.Is made only in roots
- D.Destroys the lit side
18.
Just before an exam, a student's heart races and palms sweat. This is mainly due to:
- A.Adrenaline preparing the body for 'fight or flight'
- B.Insulin lowering blood sugar
- C.Auxin
- D.Thyroxine deficiency
19.
A person with very low thyroxine may feel tired and gain weight because thyroxine controls the body's:
- A.Rate of metabolism
- B.Reflexes
- C.Reproduction only
- D.Blood clotting
20.
Why do plants rely on hormones rather than a nervous system for coordination?
- A.They have no nerves or muscles; chemical signals diffuse to cause growth responses
- B.Hormones are faster than nerves
- C.Plants do not respond to stimuli
- D.Plants have a brain
21.
Both the nervous system and hormones coordinate the body, which shows that the two systems:
- A.Work together, each suited to fast or long-lasting control
- B.Never interact
- C.Do the same job identically
- D.Are both very slow
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Stimulus
- (A) Neuron
- (B) Dendrite
- (A) Synapse
- (B) Spinal cord
- (C) Cerebrum
- (B) Cerebellum
- (C) Medulla
- (C) Chemical hormones
- (B) Geotropism
- (B) Auxin
- (B) Blood
- (B) Pancreas
- (A) Iodine (for thyroxine)
- (B) Slower but longer-lasting
Section B — Challenge / Olympiad (2 marks each)
- (A) The spinal cord handles the reflex quickly, then informs the brain
- (A) Collects on the shaded side and makes those cells grow longer
- (A) Adrenaline preparing the body for 'fight or flight'
- (A) Rate of metabolism
- (A) They have no nerves or muscles; chemical signals diffuse to cause growth responses
- (A) Work together, each suited to fast or long-lasting control
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