Class 10 Science Control and Coordination
Class 10 Science Control and Coordination Fill in the blanks , Multiple Choice Question [mcq] and True false .
Fill in the Blanks
1. The specialised tips of some nerve cells that detect information from the environment are called ________.
Answer: receptors
2. The electrical impulse in a neuron travels from the dendrite to the ________ and then along the axon.
Answer: cell body
3. The gap between two neurons where chemical signals are transmitted is called a ________.
Answer: synapse
4. Reflex arcs are formed in the ________ cord.
Answer: spinal
5. The ________ is the main thinking part of the brain.
Answer: fore-brain
6. The hormone ________ helps regulate blood sugar levels.
Answer: insulin
7. The movement of plant roots towards water is called ________.
Answer: hydrotropism
8. The ________ gland secretes adrenaline, which prepares the body for fight or flight.
Answer: adrenal
9. The ________ in the hind-brain maintains posture and balance.
Answer: cerebellum
10. The growth of pollen tubes towards ovules is an example of ________.
Answer: chemotropism
11. The hormone ________ promotes cell division in plants.
Answer: cytokinin
12. The ________ is a plant hormone that inhibits growth and causes wilting of leaves.
Answer: abscisic acid
13. The ________ system consists of the brain and spinal cord.
Answer: central nervous
14. The ________ is responsible for precision in voluntary actions like riding a bicycle.
Answer: cerebellum
15. The ________ hormone is essential for the synthesis of thyroxin.
Answer: iodine
Multiple Choice Questions (MCQs)
1. Which part of the neuron receives information?
(a) Axon
(b) Dendrite
(c) Synapse
(d) Cell body
Answer: (b) Dendrite
2. What is the function of adrenaline?
(a) Regulates blood sugar
(b) Prepares the body for fight or flight
(c) Promotes growth
(d) Controls sleep
Answer: (b) Prepares the body for fight or flight
3. Which plant hormone promotes growth?
(a) Abscisic acid
(b) Auxin
(c) Ethylene
(d) Cytokinin
Answer: (b) Auxin
4. The reflex arc involves:
(a) Brain only
(b) Spinal cord only
(c) Both brain and spinal cord
(d) Muscles only
Answer: (b) Spinal cord only
5. Which gland secretes thyroxin?
(a) Pituitary
(b) Thyroid
(c) Adrenal
(d) Pancreas
Answer: (b) Thyroid
6. The movement of shoots towards light is called:
(a) Geotropism
(b) Phototropism
(c) Hydrotropism
(d) Chemotropism
Answer: (b) Phototropism
7. Which part of the brain controls involuntary actions like breathing?
(a) Cerebrum
(b) Cerebellum
(c) Medulla
(d) Hypothalamus
Answer: (c) Medulla
8. What is the role of insulin?
(a) Regulates growth
(b) Controls blood sugar
(c) Prepares for emergencies
(d) Digests food
Answer: (b) Controls blood sugar
9. The sensitive plant (Mimosa) shows movement due to:
(a) Growth
(b) Change in water content
(c) Nervous tissue
(d) Muscle contraction
Answer: (b) Change in water content
10. Which hormone is produced by the testes?
(a) Oestrogen
(b) Adrenaline
(c) Testosterone
(d) Insulin
Answer: (c) Testosterone
11. The pituitary gland is located in the:
(a) Neck
(b) Brain
(c) Abdomen
(d) Kidney
Answer: (b) Brain
12. Which of the following is NOT a plant hormone?
(a) Auxin
(b) Gibberellin
(c) Adrenaline
(d) Cytokinin
Answer: (c) Adrenaline
13. The spinal cord is protected by the:
(a) Skull
(b) Vertebral column
(c) Rib cage
(d) Pelvis
Answer: (b) Vertebral column
14. Which hormone is responsible for the changes during puberty in females?
(a) Testosterone
(b) Oestrogen
(c) Thyroxin
(d) Insulin
Answer: (b) Oestrogen
15. The hormone that stimulates the pituitary gland is released by the:
(a) Hypothalamus
(b) Thyroid
(c) Adrenal gland
(d) Pancreas
Answer: (a) Hypothalamus
True or False
1. Reflex actions are controlled by the brain.
Answer: False (They are controlled by the spinal cord.)
2. Auxin is a plant hormone that promotes growth.
Answer: True
3. Adrenaline is secreted by the thyroid gland.
Answer: False (It is secreted by the adrenal gland.)
4. The cerebellum is responsible for maintaining posture and balance.
Answer: True
5. Synapse is the gap between two neurons.
Answer: True
6. Geotropism is the movement of plants in response to light.
Answer: False (It is in response to gravity.)
7. Insulin is produced by the pancreas.
Answer: True
8. The fore-brain is the main thinking part of the brain.
Answer: True
9. Tendrils move towards support due to hydrotropism.
Answer: False (It is due to thigmotropism.)
10. Hormones are transmitted via electrical impulses.
Answer: False (They are chemical messengers.)
11. The medulla controls voluntary actions like writing.
Answer: False (It controls involuntary actions.)
12. Iodine is essential for the synthesis of thyroxin.
Answer: True
13. Abscisic acid promotes cell division in plants.
Answer: False (It inhibits growth.)
14. The peripheral nervous system includes cranial and spinal nerves.
Answer: True
15. Growth hormone is secreted by the thyroid gland.
Answer: False (It is secreted by the pituitary gland.)
