CONTROL AND CO-ORDINATION: Very Short Answer Type Question for Class 10th Chapter 10 JKBOSE/NCERT

CONTROL AND CO-ORDINATION: Very Short Answer Type Question for Class 10th Chapter 10 JKBOSE/NCERT

Very Short Answer Type Question [1 Mark]

Question 1. Name different parts of the hindbrain.

Ans: The different parts of the hindbrain are the cerebellum, pons, and medulla oblongata.

Question 2. Define “Reflex”.

Ans: Reflex is an involuntary and nearly instantaneous response to a stimulus, mediated by the spinal cord or lower brain

Question 3. Name any two environmental triggers which change the direction of plant parts.

Ans: Two environmental triggers that change the direction of plant parts are light (phototropism) and gravity (geotropism).

Question 4. How do plant cells change their shape?

Ans: Plant cells change their shape through a process called cell expansion or elongation, which is driven by the intake and redistribution of water.

Question 5. Define Phototropism.

Ans: Phototropism is the growth or movement of a plant part in response to light, where the plant bends towards the light source.

Question 6. Define Geotropism.

Ans:  Geotropism (also known as gravitropism) is the growth or movement of a plant part in response to gravity, where the roots grow downwards (positive geotropism) and the shoots grow upwards (negative geotropism).

Question 7. Which mechanism regulates the action of hormones?

Ans: The endocrine system regulates the action of hormones.

Question 8. Define puberty.

Ans: Puberty is the stage of development during which a person becomes sexually mature and capable of reproduction.

Question 9. ………………is the main thinking part of the brain.

Ans: The cerebral cortex is the main thinking part of the brain.

10. Bumpy structure that protects the spinal cord is…………….

Ans: The bumpy structure that protects the spinal cord is the vertebral column or spinal column.

Question 11. Directional movement of the seedling is caused by……………….

Ans: The directional movement of a seedling is caused by tropisms, specifically phototropism and geotropism.

Question 12. Wilting of leaves is due to……………..

Ans: Wilting of leaves is due to the loss of turgor pressure or water deficiency.

Question 13. …………….. is due to the deficiency of growth hormones in childhood.

Ans: Dwarfism is due to the deficiency of growth hormones in childhood.

Question 14. Adrenaline is secreted by ………………. gland.

Ans: Adrenaline is secreted by the adrenal gland.

Question 16. Iodine is necessary for: (Choose the correct option)

(i) Pineal gland(ii) Thyroid gland (iii) Parathyroid gland (iv) Adrenal gland

Ans:  thyroid gland.

Question 17. Which of the following hormones is responsible for cell division: (Choose the correct option)

(i) Auxin (ii) Cytokinin (iii) Ethylene (iv) Abscisic acid

Ans: Cytokinin

Question 18. Pea plants climb up other plants through: (Choose the correct option)

(i) Axillary buds (ii) Tendrils (iii) Stipules (iv) Thorns

Ans: Tendrils.

Question 19. The gap between neurons is called: (Choose the correct option)

(i) Dendrite (ii) Synapse (iii) Axon (iv) Myelin sheath

Ans: synapse.

Question 20. Which of the following is the male sex hormone: (Choose the correct option)

(i) Oestrogen (ii) Testosterone (iii) Testes (iv) Insulin

Ans: Testosterone

Question 21. Taste is detected by gustatory receptors. (True/False)

Ans: True

Question 22. The smell is detected by olfactory receptors. (True/False)

Ans: True

Question 23. Goitre is caused due to the deficiency of thyroxine. (True/False)

Ans: True

Question 24. Growth of our arms and fingers occurs haphazardly. (True/False)

Ans: False

Question 25. The movement of sunflowers in response to day or night comes under the category of slow movements. (True/False)

Ans: False