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 is neurogila?Give its role.

  • Ans 1: In higher animals half of the nervous system consists of neurogila cells.It plays a vital role in the nutrition of neurons and their protection by myelin sheath.
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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 is neurogila?Give its role.

  • Ans 1: In higher animals half of the nervous system consists of neurogila cells.It plays a vital role in the nutrition of neurons and their protection by myelin sheath.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 2

Question # 1

Define feedback machanism.

  • Ans 1: It is a type of interaction in which a controlling mechanism is itself controlled by the products of the reaction it is controlling.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 3

Question # 1

Differentiate between nerves and ganglia.

  • Ans 1: Nerve The nerves are the bundles of axons or dendrites bounded by connective tissues.
  • Ans 2: Ganglion The concentrated mass of cell bodies of neuron is called ganglion.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 4

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 5

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 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

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

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