Tag: temperature control

Questions Related to temperature control

Which of the following process keeps the body constant?

temperature control homeostasis coordination and response biology

  1. Transduction

  2. Homeostasis

  3. Feedback control

  4. All of the above

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Correct Option: B
Explanation:

Homeostasis is the ability of an organism to maintain a constant internal environment. Homeostasis is maintained by the hypothalamus with the help of negative feedback loops that counteract changes of many characteristics from their set points. For example, when there is a rise in body temperature a negative feedback loop will bring it back to normal towards the set point of 37.5$^o$ C. Hence homeostasis is necessary for the well-being of individual cells and of the entire body. Thus the correct answer is option B.

Temperature has been increased about 2 degree Celsius over

temperature control homeostasis coordination and response biology

  1. Poles

  2. Temperate region

  3. Taiga

  4. All of above

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Correct Option: A

What is the effect of shivering in raising the body temperature during cold weather?

temperature control homeostasis coordination and response biology

  1. Shivering dilates blood vessels

  2. Shivering constricts blood vessels

  3. Shivering increases the heart rate

  4. Shivering stimulates rapid muscle action

  5. Shivering tightens skin to cause goose bumps

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Correct Option: D
Explanation:

Our body needs to maintain a 37°C to function properly. If it drops it could damage our organs or brain, so to stop this happening, our body strictly regulates temperature. Shivering is an involuntary pattern of repetitive, rhythmic muscle contractions. This twitching exercise produces heat, which helps to raise body temperature. Thus, the correct answer is option D.

Temperature control centre is located in the

temperature control homeostasis coordination and response biology

  1. Hypophysis

  2. Hypothalamus

  3. Diencephalon

  4. None of the above

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Correct Option: B
Explanation:

Diencephalon consists of thalamus and hypothalamus. Thalamus serves as a relay station for sensory impulses as well as integration centre for recognition of pain, temperature and hard touch. The thermostat centre for temperature control is present in the hypothalamus. Hypothalamus maintains the constant human body temperature by regulation of the diameter of blood vessels (constriction or dilation), shivering and sweating mechanisms. The pituitary gland is also known as hypophysis. The pituitary gland is mainly concerned with growth and development of organism via its growth hormone and with the regulation of secretion of hormones by other endocrine glands via its tropic hormones. Thus, the correct answer is option B.

If the external temperature is low 

temperature control homeostasis coordination and response biology

  1. Warm receptors are activated.

  2. Warm receptors are inhibited.

  3. Thermostat becomes operational ordering vasoconstriction of peripheral vessels and stimulation of skeletal muscles.

  4. Thermostat becomes operational ordering vasoconstriction of peripheral vessels and activation of sweat glands.

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Correct Option: C

Animals with built-in thermostat are 

temperature control homeostasis coordination and response biology

  1. Biothermic

  2. Oliogothermic

  3. Poikilothermic

  4. Homeothermic

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Correct Option: D
Explanation:
  • Homeothermy or homeothermy is thermoregulation that maintains a stable internal body temperature regardless of external influence.
  • Hypothalamus is the built-in thermostat present in the homeothermic animal's body.
  • The hypothalamus controls the body's responses to the outside temperature. When you get hot, you sweat.
  • Hence Animals with built-in thermostat are Homeothermic.
  • So,  the correct answer is 'Homeothermic'.