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

What are pacinian corpuscles?

  • Ans 1: Pacinian corpuscles situated deep in the body.These are also encapsulated neuron endings and receive the deep pressure stimulus.Those located in the limbs probably from a basis for vibration sense.
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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

What are pacinian corpuscles?

  • Ans 1: Pacinian corpuscles situated deep in the body.These are also encapsulated neuron endings and receive the deep pressure stimulus.Those located in the limbs probably from a basis for vibration sense.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 2

Question # 1

Define biorhythms and gives its types.

  • Ans 1: In living organisms the behavioral activities occur at regular intervals which are called biorhythms.
    1. Circannual rhythms (365 days)
    2. Diurnal rhythms (24 hours)
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12th Class Biology Chapter 17 Short Questions Preparation - Set 3

Question # 1

Compare photoreceptors with chemoreceports.

  • 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: Photoreceptors Electromagnetic receptors or photoreceptors respond to stimuli of light for example in eyes,rods and cones
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12th Class Biology Chapter 17 Short Questions Preparation - Set 4

Question # 1

What is reflex action?

  • Ans 1: Reflex action is a type of involuntary action.The direction of stimulus is from receptors to sensory neuron to associative neuron and then through motor neuron to the effectors.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 5

Question # 1

How brain is protected with various covers?

  • Ans 1: Cranium protects the brain.Beneath the cranium brain is protected by triple layer of meninges.Between the meninges there is filled cerebrospinal fluid which act as shock absorber.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 6

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 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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17th Chapter

12th Class Biology Chapter 17 Short Questions

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