Chapter 27, Problem 1MCQ

Summary Introduction

Introduction:

  The sensory adaptation is the process in which the sensitivity towards the continuous signals gets reduced. This results in the less sensitivity of the receptors towards the signals. This process occurs for all the senses like hearing, taste, touch except the vision because vision is important for the humans.

Answer to Problem 1MCQ

Correct answer:

During sensory adaptation, the sensation of a stimulus decreases, the perception of stimulus decreases and sensory receptors respond to a stimulus with fewer action potential. Therefore, option d is correct.

Explanation of Solution

Reasons for the correct statements:

The sensory adaptation is a process in which sensory receptors get desensitized by the prolonged exposure of a stimulus. These results in the fewer generation of an action potential and fewer impulses are sending to the brain, due to which the perception of a stimulus gets decreases. Hence, a sensory adaptation of sensory receptor desensitized which result in the sensation of a stimulus decreases, the perception of stimulus decreases and sensory receptors respond to a stimulus with fewer action potential.

Hence, option d  is correct.

Reasons for the incorrect statements:

Option (a) is given as “The sensation of a stimulus decreases”.

Due to sensory adaptation, the sensation of stimulus get decreased is the correct option. But the options like the perception of stimulus decreases and sensory receptors respond to a stimulus with fewer action potentials are also correct. Hence, it is a wrong answer.

Option (b) is given as “The perception of stimulus decreases”.

Due to sensory adaptation, the perception of stimulus gets decreased is the correct option. But the options like the sensation of stimulus decreases and sensory receptors respond to a stimulus with fewer action potentials are also correct. Hence, it is a wrong answer.

Option (c) is given as “Sensory receptors respond to a stimulus with fewer action potentials”.

Due to sensory adaptation, Sensory receptors respond to a stimulus with fewer action potentials is the correct option. But the options like the sensation of stimulus decreases and perception of stimulus decreases are also correct. Hence, it is a wrong answer.

Hence, options (a), (b), and (c) are incorrect.

Conclusion

The sensory adaptation decreases the sensation of stimulus, the perception of the stimulus, and receptor responds toward stimulus by generating fewer action potentials.