Fsc Part 2 Online Preparation for Biology Chapter 17 (Coordination and Control)

Online Short Questions For Chapter 3 "12th Class Biology Chapter 17 Short Questions Preparation "

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Biology - 12th Class Biology Chapter 17 Short Questions Preparation

Question # 1

Define habituation. Give its example.

  • Ans 1: It is the simplest from of learning and involves modification of behavior through decrease in response due to repeated stimuli e.g Rodents respond to alarm cells by others in their groups,if these calls are continued and no danger is confirmed further calls may be ignored.
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Prepare Complete Set Wise Questions For Chapter 3 "12th Class Biology Chapter 17 Short Questions Preparation "

12th Class Biology Chapter 17 Short Questions Preparation - Set 1

Question # 1

Define habituation. Give its example.

  • Ans 1: It is the simplest from of learning and involves modification of behavior through decrease in response due to repeated stimuli e.g Rodents respond to alarm cells by others in their groups,if these calls are continued and no danger is confirmed further calls may be ignored.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 2

Question # 1

Differentiate between chemoreceptors and mechanoreceptors.

  • Ans 1: Chemoreceptors These are sensitive for chemical changes.These are for smell,taste and for blood carbon dioxide and oxygen,glucose,amino acids and fatty acids(receptors in hypothalamus)
  • Ans 2: Mechanoreceptors These detect stimuli of touch,pressure hearing and equilibrium
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12th Class Biology Chapter 17 Short Questions Preparation - Set 3

Question # 1

How ca++concentration in human blood is regulated?

  • Ans 1: Calcium level in human is controlled by the paratharmone. Low level of calcium ions in the blood stimulate parathyroid directly to increase the parathormone production whereas high level of calcium ions in the blood suppresses its release.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 4

Question # 1

Give role of human gut as endocrine tissue.

  • Ans 1: Human gut act as endocrine gland. Important hormones produced by gut are Gastrin: This hormone is produced by mucosa of pyloric region of the stomach. It stimulates the production of gastric juice. It produced under the influence of protein in the food.
  • Ans 2: Secretin: It produced from the duodenum when the acidic food from the stomach touches its lining. Affect the pancreas to produce and secrete pancreatic juice and also affect rate of bile production in the liver.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 5

Question # 1

What is circannual rhythm?

  • Ans 1: The rhythmic activities of organisms which are performed annually or after 365 days is called circannual rhythm.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 6

Question # 1

Differentiate between kineses and taxes.

  • Ans 1: Kineses: kineses is a behavior in which an organism changes the speed of random movement which helps them to survive in the environment.
  • Ans 2: Taxes: in contrast to kineses a taxis is a directed movement either towards or away from a stimulus.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 7

Question # 1

Give the functions of androgens.

  • Ans 1: In human males androgens cause the development of secondary male characteristics. In females its excess secretion may cause the development of male characters.
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12th Class Biology Chapter 17 Short Questions

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