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

Name hormones released by adrenal gland.

  • Ans 1: It produces adrenaline and nor adrenaline by adrenal medulla.
    Adrenal cortex produces aldosterone and androgenic hormones.

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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

Name hormones released by adrenal gland.

  • Ans 1: It produces adrenaline and nor adrenaline by adrenal medulla.
    Adrenal cortex produces aldosterone and androgenic hormones.

Submit

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

What are the commercial applications of cytokinins?

  • Ans 1: It is used to delay age of fresh leaf crops and keep flowers fresh.It can also be used to break dormancy of seeds of some plants.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 4

Question # 1

What is cerebrospinal fluid?Give its function.

  • Ans 1: Beneath the cranium,the brain and spinal cord are protected by triple layer of meninges.Between the layers of meninges the cerebrospinal fluid (CSF),similar in composition to blood plasma.
  • Ans 2: Its function is to bath the neurous of brain and spinal cord and it cushions against bumps and jolts.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 5

Question # 1

What are effectors?Give example.

  • Ans 1: Effectors are the organs which show response after receiving message from the associative neurons via motor neurons.For example muscles and glands.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 6

Question # 1

What is the role of anti diuretic hormone(ADH)?

  • Ans 1: ADH secretion cause decrease in blood pressure,blood volume and osmotic pressure of the blood detected by osmoreceptors in the hypothalamus.It is mainly control the concentration of urine.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 7

Question # 1

What is action of nicotine on coordination?

  • Ans 1: Nicotine affects post synaptic membrane in CNS and PNS.It minimizes the action of acytylcholine on the nicotine receptors.So it is sitmulant of nerve impluse. It increases the heart beat rate,blood pressure and digestive tract mobility. Nicotine may cause vomiting,diarrhoea and even cause water retention relation by the kidneys.
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12th Class Biology Chapter 17 Short Questions

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