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

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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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

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.
Submit

12th Class Biology Chapter 17 Short Questions Preparation - Set 2

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 3

Question # 1

Write four important roles of ethylene.

  • Ans 1: Ethene inhibits root growth.

  • Ans 2: Break dormancy of buds
  • Ans 3: promote fruit ripening.
  • Ans 4: Promote flowering in pineapple.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 4

Question # 1

Differentiate between kineses and taxes.

  • Ans 1: Kineses: kineses is a behavior in which an organism changes the speed of random movement which helps them to survive in the environment.
  • Ans 2: Taxes: in contrast to kineses a taxis is a directed movement either towards or away from a stimulus.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 5

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 6

Question # 1

What is cretinism?

  • Ans 1: If congenitally thyroxin production is low,it may cause cretinism,where the individual fails to develop normally.These are small,have coarse scanty hairs,thick yellowish scaly skin and mentally retarded.
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12th Class Biology Chapter 17 Short Questions Preparation - Set 7

Question # 1

What are neurotransmitters?Give it example.

  • Ans 1: Neurotransmitters are the chemicals which are secreted at neuron endings,which transfer nerve impluse from on neuron to another neuron e.g Acetylcholine,adrenaline,dopamine,serotonin.
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12th Class Biology Chapter 17 Short Questions

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