Immediate Hand Removal from Hot Objects
When a person touches a hot object, the heat acts as a potentially harmful stimulus.
Specialized nerve endings in the skin, known as receptors, detect this heat stimulus. These receptors are highly sensitive to temperature changes.
The detection of intense heat triggers a rapid signal that travels along sensory nerves to the spinal cord and brain. This sensory input indicates a potential danger (burning).
The nervous system initiates a quick, involuntary response called a reflex action. This reflex action bypasses conscious thought for speed.
The reflex pathway sends a command via motor nerves back to the muscles in the arm, causing them to contract and pull the hand away instantly from the hot object. This sensitivity to the stimulus of touch, specifically heat, is crucial for preventing serious injury.
Therefore, human beings can remove their hand immediately because they are sensitive to the stimulus of touch, which elicits a protective reflex.
Important Questions from Biology
Which of the following statements about living and non-living being is/are correct?
1. While living being can demonstrate growth and repair, non-living being cannot.
2. While living being demonstrates metabolic processes, non-living being does not.
Select the correct answer using the code given below.Movement of materials to different parts of cytoplasm and nucleus is generally carried out by
The gaseous product of a process in plants is a requirement for another vital process that releases energy. Given below are four combinations of the process and product. Identify the correct answer.
Which one of the following cell organelles may play a role in expelling excess water and wastes in case of unicellular organisms?
Transformation of meristematic cells into specific permanent tissues occurs by the process of
