Class 10 Control and Coordination Mock Test (CBSE)

Topics in Control and Coordination

• Nervous system
• Reflex actions
• Human brain
• Protection of nervous tissue
• How nervous tissue causes action
• Immediate response to stimulus in plants
• Movement due to growth in plants
• Hormones in animals

Control and Coordination practice questions with answers

1. Q1Multiple choice·1 mark
   Which of the following endocrine glands is incorrectly paired with the hormone it secretes?

   1. (a)Thyroid gland - Thyroxin
   2. (b)Adrenal gland - Adrenaline
   3. (c)Pancreas - Insulin
   4. (d)Testis - Progesterone
   Show answer and step marks

   1. Correct option: (d) Testis secretes testosterone, whereas progesterone is a female sex hormone secreted by the ovary.+1

   Answer: (d)
2. Q2Multiple choice·1 mark
   The gap between two neurons where nerve impulses are transmitted via chemical messengers is called a:

   1. (a)Axon
   2. (b)Synapse
   3. (c)Dendrite
   4. (d)Impulse
   Show answer and step marks

   1. Correct option: (b) Synapse+1

   Answer: (b)
3. Q3Multiple choice·1 mark
   Which part of the human brain is responsible for precision of voluntary actions and maintaining the posture and balance of the body?

   1. (a)Cerebrum
   2. (b)Cerebellum
   3. (c)Medulla
   4. (d)Pons
   Show answer and step marks

   1. Correct option: (b) Cerebellum controls posture, balance, and precision of voluntary actions.+1

   Answer: (b)
4. Q4Multiple choice·1 mark
   Which of the following endocrine glands is mismatched with the hormone it secretes?

   1. (a)Thyroid — Thyroxine
   2. (b)Pancreas — Insulin
   3. (c)Adrenal — Adrenaline
   4. (d)Pituitary — Progesterone
   Show answer and step marks

   1. Correct option: (d) Pituitary — Progesterone+1

   Answer: (d)
5. Q5Short answer·3 marks
   Name the hormone secreted by the thyroid gland and state its one important function in the human body. What is the cause of goitre, and mention one prominent symptom of this disease?
   Show answer and step marks

   1. The hormone secreted by the thyroid gland is thyroxine.+0.5
   2. Function, any one of: regulates carbohydrate, protein and fat metabolism in the body to provide the best balance for growth; controls the rate of metabolism; or any other valid function of thyroxine.+1
   3. Cause of goitre: deficiency of iodine in the diet, as iodine is needed by the thyroid to make thyroxine.+1
   4. Symptom: swelling of the neck due to an enlarged thyroid gland (swollen neck), or any other valid symptom.+0.5

   Answer: Thyroxine; it regulates carbohydrate, protein and fat metabolism. Goitre is caused by iodine deficiency in the diet; a prominent symptom is a swollen neck.
6. Q6Short answer·3 marks
   What is a reflex action? State the pathway of a reflex arc in the correct sequence from the stimulus to the response.
   Show answer and step marks

   1. Define reflex action: A sudden, involuntary and automatic response to a stimulus that protects the body from potential harm.+1
   2. State the correct sequence of the components in a reflex arc: Receptor $\rightarrow$ Sensory neuron $\rightarrow$ Spinal cord (Relay neuron) $\rightarrow$ Motor neuron $\rightarrow$ Effector.+2

   Answer: A reflex action is a sudden, involuntary and automatic response to a stimulus. Pathway: Receptor $\rightarrow$ Sensory neuron $\rightarrow$ Spinal cord (relay neuron) $\rightarrow$ Motor neuron $\rightarrow$ Effector.

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