Worksheet 22 Life Processes @CBSE TOPPER @ CBSE @NEET Exam 100 % Success

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Fast Revision



1. Synapse is a small gap between neurons where nerve impulse passes from one neuron to the next.

2. Peripheral nervous system consists of all the nerves, i.e. the Cranial, Spinal and Visceral, connecting the CNS with the body.

3. Tropic movement: These movements of based on direction. example: phototropism etc.

4. Nastic movement: These movements occurs irrespective of direction of stimulus. example: photonasty.

5. Auxins help in cell elongation and division.

6. Gibberellins help in stem and flower growth.

7. Cytokinin promote cell division and delay ageing of leaves.

8. Abscisic acid inhibits growth.

9. Ethylene is a ripening hormone.

10. Endocrine gland: That gland which secrets hormones direct into blood.(Ductless gland)

11. Exocrine gland: That gland which secrets their secretion into duct.(Duct gland)

12. Heterocrine gland: Which have both ability Duct as well as Ductless. Example: Pancreas. testis, ovary.

13. When pancreas release insulin or glucagon it will be known as Ductless or Endocrine gland.

14. Pancreas: release----Digestive enzyme: Duct gland or exocrine gland.

15. Testis----->Sperm------> Duct gland.

16. Testis...….Testosterone------->Ductless gland.

17. Ovary------->Egg------->Duct gland.

18. Ovary------>Oestrogen------>Ductless gland.

19. Pituitary gland release tropic hormone: growth hormone.

20. Thyroid secretes: Thyroxine.

21. Pancreas secrets : Insulin and Glucagon.

22. Dwarfism occurs due to less secretion of growth hormone.

23. Gigantism is caused by hypersecretion of growth hormone.

24. Diabetes reduced amount of insulin is secreted by pancreas leads to high sugar level in blood.

25. Goitre : It is caused by the deficiency of iodine causing less secretion of thyroxine hormone.

26. Feedback mechanism: It is the regulation of amount and the timing of hormonal secretion.

27. Pulmonary circulation: In this the deoxygenated blood is pushed by right ventricle to the lungs for oxygenated through pulmonary artery. This oxygenated blood is then brought back to the left atrium of the heart through pulmonary veins.

28. Systemic circulation: In this, oxygenated blood brought to left atrium goes to the left ventricle. It is then passed on to different body parts of body through aorta.

29. Sphygmomanometer is a device to measure blood pressure.

30. Longest part of Large intestine also known as Colon.





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