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 meissner's corpuscles?

  • Ans 1: Meissner's corpuscles (encapsulated endings) which lie in papillae which extend into the ridges of the finger tips.The corpuscles consists of spiral and much twisted endings,each of which ends in knob.These are touch receptors.
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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 meissner's corpuscles?

  • Ans 1: Meissner's corpuscles (encapsulated endings) which lie in papillae which extend into the ridges of the finger tips.The corpuscles consists of spiral and much twisted endings,each of which ends in knob.These are touch receptors.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 2

Question # 1

Define Nissl's Granules.

  • Ans 1: Nissl's granules which are groups of ribosomes associated with rough endoplasmic reticulum and glogi apparatus for protein synthesis,present in cell body of neuron.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 3

Question # 1

Define receptors.Give their types.

  • Ans 1: Receptors are the sensory organs which receive stimulus and transfer it to associative neurons via sensory neurons for further action e.g,eye,ear,nose,skin and tongue.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 4

Question # 1

Compare sympathetic nervous system with parasympthetic nervous system.

  • Ans 1: Parasympathetic nervous system A few cranial nerves including the vagus nerve together with the fibre from bottom portion of spinal cord from PNS.it promotes all the internal responses which are associated with the relaxed state i.e,contraction of pupil,promotes food digestion and retards heart beat.
  • Ans 2: Sympthethic nervous system Most ganglion fibers of the sympathetic nervous system arise from the middle portion of the spinal cord and almost terminate in ganglia that lie near the cord.This system is important during emergency situation and associated with fight or flight.This system accelerates the heart beat and dilates the pupil and inhibits the digestion of food etc.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 5

Question # 1

Give two commercial application of ethane.

  • Ans 1: It is used to increase the speed of lates flow in rubber plant.it is also used for artificial ripening of fruits and to induce flowering in pineapple.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 6

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 7

Question # 1

Differentitae between reflex arc and reflex action.

  • Ans 1: Reflex arc The path followed by the nerve impulse during the reflex action is called reflex arc.
  • Ans 2: Reflex Action Involuntary actions are called reflex action.This action is performed without the involvement of brain.
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12th Class Biology Chapter 17 Short Questions

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