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 synapse.

  • Ans 1: There are the microscopic gaps between the two neurons where neurotransmitters are secreted and nerve impluse is transferred from one neuron to next neuron.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 1

Question # 1

Define synapse.

  • Ans 1: There are the microscopic gaps between the two neurons where neurotransmitters are secreted and nerve impluse is transferred from one neuron to next neuron.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 2

Question # 1

What is sodium potassium pump?

  • Ans 1: These are the special proteins which are present on the neuron membrane and act as pump to move the K ions across the membrane during the transmissionof nerve impluse
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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 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 5

Question # 1

Write down four functions of auxin.

  • Ans 1: Function of auxin are
  • Ans 2: Auxin promote cell elongation
  • Ans 3: It promotes cell division in cambium
  • Ans 4: It can induce parthenocarpy
  • Ans 5: It promotes apical dominance
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12th Class Biology Chapter 17 Short Questions Preparation - Set 6

Question # 1

Give two characteristics of hormones.

  • Ans 1: hormones are porteins in nature.

  • Ans 2: They help in the co-ordination of the organisms by activating the target cells of the body.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 7

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

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