Chapter 7 Control and Coordination | MCQ Question For Class 10 Science English Medium With Answers | SSLC 2021 Exam Preparation In English |

Chapter 7 Control and Coordination

Multiple Choice Questions (MCQ) 

1. Which plant hormone promotes dormancy in seeds and buds?

(a) Auxin

(b) Gibberellin

(c) Cytokinin

(d) Abscisic acid

Answer: (d) Abscisic acid

2. Roots of plants are:

(a) positively geotropic

(b) negatively geotropic

(c) positively phototropic

(d) None of these

Answer: (a) positively geotropic

3. Response of plant roots towards water is called:

(a) Chemotropism

b) Phototropism

(c) Hydrotropism

(d) Geotropism

Answer: (c) Hydrotropism

4. Movement of sunflower in accordance with the path of Sun is due to

(a) Chemotropism

(b) Geotropism

(c) Phototropism

(d) Hydrotropism

Answer: (c) Phototropism

5. Which plant hormone promotes cell division?

(a) Auxin

(b) Gibberellin

(c) Cytokinin

(d) Abscisic acid

Answer: (c) Cytokinin

6. The main function of abscisic acid in plants is

(a) to promote cell division.

(b) to inhibit growth.

(c) to promote growth of stem.

(d) to increase the length of cells.

Answer: (b) to inhibit growth.

7. Fall of mature leaves and fruits from plants is triggered by which of the following substance?

(a) Auxin

(b) Cytokinin

(c) Gibberellin

(d) Abscisic acid

Answer: (d) Abscisic acid

8. Any change in the environment to which an organism responds is called

(a) stimulus

(b) coordination

(c) response

(d) hormone

Answer: (a) stimulus

9. A part of the body which responds to the in-structions sent from nervous system is called

(a) receptor

(b) effector

(c) nerves

(d) muscles

Answer: (b) effector

10. The longest fibre on the cell body of a neuron is called

(a) sheath

(b) cytoplasm

(c) axon

(d) dendrites

Answer: (c) axon

11. Which nerves transmit impulses from the cen¬tral nervous system towards muscle cells?

(a) Sensory nerves

(b) Motor nerves

(c) Relay nerves

(d) Cranial nerves

Answer: (b) Motor nerves

12. A microscopic gap between a pair of adjacent neurons over which nerve impulses pass is called

(a) neurotransmitter

(b) dendrites

(c) axon

(d) synapse

Answer: (d) synapse

14. The highest coordinating centre in the human body is

(a) spinal cord

(b) heart

(c) brain

(d) kidney

Answer: (c) brain

15. Main function of cerebrum is

(a) thinking

(b) hearing

(c) memory

(d) balancing

Answer:(a) thinking

16. Posture and balance of the body is controlled by

(a) Pons

(b) Medulla oblongata

(c) Cerebellum

(d) Cerebrum

Answer: (c) Cerebellum

17. Breathing is controlled by which part of the brain?

(a) Cerebrum

(b) Cerebellum

(c) Hypothalamus

(d) Medulla oblongata

Answer: (d) Medulla oblongata

18. Which part of nervous system controls the re¬flex activities of the body?

(a) Brain

(b) Spinal cord

(c) Cerebrum

(d) Cerebellum

Answer: (b) Spinal cord

19. Which of the following acts as both endocrine and exocrine gland?

(a) Pancreas

(b) Thyroid

(c) Adrenal

(d) Liver

Answer: (a) Pancreas

20. Identify which of the following statements about thyroxin is incorrect?

(a) Thyroid gland requires iodine to synthesize thyroxin.

(b) Thyroxin is also called thyroid hormone.

(c) It regulates protein, carbohydrates and fat metabolism in the body.

(d) Iron is essential for the synthesis of thyroxin.

Answer: d

21. Which gland secretes the growth hormone?

(a) Pituitary gland

(b) Thyroid

(c) Hypothalamus

(d) Adrenal

Answer: (a) Pituitary gland

22. The secretion of which hormone leads to physical changes in the body when you are 10-12 years of age?

(a) Oestrogen from testes and testosterone from ovar.

(b) Estrogen from adrenal gland and testosterone from pituitary gland.

(c) Testosterone from testes and estrogen from ovary.

(d) Testosterone from thyroid gland and estrogen from pituitary gland.

Answer: (c) Testosterone from testes and estrogen from ovary.

23. A diabetic patient suffers from deficiency of which hormone?

(a) Thyroxine

(b) Testosterone

(c) Oestrogen

(d) Insulin

Answer: (d) Insulin

24. Which of the following endocrine glands does not exist in pairs?

(a) Testes

(b) Adrenal

(c) Pituitary

(d) Ovary

Answer: (c) Pituitary

Fill in the Blanks

1. Control and coordination are the functions of the nervous system and ……… in our body.

Answer : 1. hormones

2. The nervous system uses ……… impulses to transmit messages.

Answer : 2. electrical

3. Central nervous system consists of ……… and ………

Answer : 3. brain, spinal cord

4. Largest part of the brain is ………

Answer : 4. cerebrum

5. Deficiency of ……… hormone in childhood leads to dwarfism in humans.

Answer : 5. growth

6. The growth of pollen tubes towards the ovules is the result of a ……… movement.

Answer : 6. chemotropic