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Which of the following is an example of negative feedback loop in humans? [2007]
- a)Secretion of tears after falling of sand particles into the eye.
- b)Salivation of mouth at the sight of delicious food
- c)Secretion of sweat glands and constriction of skin blood vessels when it is too hot
- d)Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold
Correct answer is option 'D'. Can you explain this answer?
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Which of the following is an example of negative feedback loop in huma...
When the set point of hypothalamus is disturbed by high temperature, it stimulates vasodilation and sweating while in low temperature there is vasoconstriction and shivering.
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Which of the following is an example of negative feedback loop in huma...
Introduction:
Negative feedback loops are a regulatory mechanism in the human body that help maintain homeostasis by counteracting any deviations from the normal range. In this question, we are asked to identify an example of a negative feedback loop in humans.
Explanation:
The correct answer is option D, which involves the constriction of skin blood vessels and contraction of skeletal muscles when it is too cold. Let's break down the components of this negative feedback loop and understand how it works:
1. Stimulus:
The stimulus in this case is exposure to cold temperatures. When the body senses cold, it triggers a response to maintain internal body temperature within the normal range.
2. Receptor:
Receptors in the skin and other tissues detect the decrease in temperature and send signals to the control center.
3. Control Center:
The control center in this case is the hypothalamus, a region of the brain that regulates body temperature. It receives the signals from the receptors and initiates the appropriate response.
4. Effector:
The effectors in this case are the smooth muscles surrounding the blood vessels in the skin and the skeletal muscles. These effectors respond to the signals from the control center and bring about the necessary changes.
5. Response:
The response to cold temperatures is two-fold:
- Constriction of skin blood vessels: The smooth muscles surrounding the blood vessels in the skin contract, reducing blood flow to the skin's surface. This helps minimize heat loss through the skin.
- Contraction of skeletal muscles: The skeletal muscles contract, causing shivering. Shivering generates heat, which helps increase body temperature.
6. Feedback:
The response generated by the effectors (constriction of skin blood vessels and contraction of skeletal muscles) helps raise body temperature back to the normal range. Once the body temperature reaches the desired level, the stimulus (cold temperature) is no longer present, and the negative feedback loop is complete.
Conclusion:
In conclusion, the example of a negative feedback loop in humans is the constriction of skin blood vessels and contraction of skeletal muscles when it is too cold. This response helps maintain body temperature within the normal range by reducing heat loss and generating heat.
Negative feedback loops are a regulatory mechanism in the human body that help maintain homeostasis by counteracting any deviations from the normal range. In this question, we are asked to identify an example of a negative feedback loop in humans.
Explanation:
The correct answer is option D, which involves the constriction of skin blood vessels and contraction of skeletal muscles when it is too cold. Let's break down the components of this negative feedback loop and understand how it works:
1. Stimulus:
The stimulus in this case is exposure to cold temperatures. When the body senses cold, it triggers a response to maintain internal body temperature within the normal range.
2. Receptor:
Receptors in the skin and other tissues detect the decrease in temperature and send signals to the control center.
3. Control Center:
The control center in this case is the hypothalamus, a region of the brain that regulates body temperature. It receives the signals from the receptors and initiates the appropriate response.
4. Effector:
The effectors in this case are the smooth muscles surrounding the blood vessels in the skin and the skeletal muscles. These effectors respond to the signals from the control center and bring about the necessary changes.
5. Response:
The response to cold temperatures is two-fold:
- Constriction of skin blood vessels: The smooth muscles surrounding the blood vessels in the skin contract, reducing blood flow to the skin's surface. This helps minimize heat loss through the skin.
- Contraction of skeletal muscles: The skeletal muscles contract, causing shivering. Shivering generates heat, which helps increase body temperature.
6. Feedback:
The response generated by the effectors (constriction of skin blood vessels and contraction of skeletal muscles) helps raise body temperature back to the normal range. Once the body temperature reaches the desired level, the stimulus (cold temperature) is no longer present, and the negative feedback loop is complete.
Conclusion:
In conclusion, the example of a negative feedback loop in humans is the constriction of skin blood vessels and contraction of skeletal muscles when it is too cold. This response helps maintain body temperature within the normal range by reducing heat loss and generating heat.
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Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer?
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Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer?.
Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer?.
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Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following is an example of negative feedback loop in humans? [2007]a)Secretion of tears after falling of sand particles into the eye.b)Salivation of mouth at the sight of delicious foodc)Secretion of sweat glands and constriction of skin blood vessels when it is too hotd)Constriction of skin blood vessels and contraction of skeletal muscles when it is too coldCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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