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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Which is a somatic sensation?

  1. a. taste
  2. b. smell
  3. c. touch
  4. d. hearing
  5. e. a through c
  6. f. all of the above

Summary Introduction

Introduction: Somatic sensations originate at sensory receptors in skin, joints, and muscle. They travel along sensory neurons to spinal cord and somatosensory cortex. Visceral sensations originate when sensory neurons are stimulated inside the organs and the signals are relayed to spinal cord and brain.

Explanation

Reason for the correct statement:

Somatic sensations arise when a stimulus excites a sensory neuron through action potential. They are sensed by sensory receptors-mechanoreceptors, thermoreceptors, chemoreceptors, photoreceptors, and pain receptors. Touch is sensed by mechanoreceptors in skin as they respond to mechanical energy.

Hence, option c. is correct.

Reasons for the incorrect statement:

Option a. is given as “taste”. Taste is a special sense that arises from the activation of receptors located in specific sensory organ that is the mouth. Hence, it is a wrong answer.

Option b. is given as “smell”. Smell is a special sense that arises from the activation of receptors located in specific sensory organ that is the nose...

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