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 do you Know about saltatory nerve?

  • Ans 1: In myelinated neuron the nerve impulse jump from on node to another node (node of Ranvier).It is called salutatory nerve impulse.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 1

Question # 1

What do you Know about saltatory nerve?

  • Ans 1: In myelinated neuron the nerve impulse jump from on node to another node (node of Ranvier).It is called salutatory nerve impulse.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 2

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 Preparation - Set 3

Question # 1

What are the functions of oxytocin hormone?

  • Ans 1: It cause distention of cervix,its primary function is on smooth muscles,particularly on uterus during child birth and also cause milk ejection.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 4

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 5

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 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

Write down the role of hypothalamus in chemical coordination.

  • Ans 1: It is a part of fore brain.It is here that many of the sensory stimuli of nervous system are converted into hormonal responses.It is believed that oxytocin and ADH are produced in hypothalamus.
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12th Class Biology Chapter 17 Short Questions

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