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Question #45777
The Question
Which of the following statements is INCORRECT regarding the arrector pili muscles and their associated physiological response in humans?
Options
- A.
They are composed of fusiform, uninucleate muscle fibers that lack alternating light and dark bands.
- B.
Their contraction is regulated by the somatic nervous system to generate heat during extreme cold.
- C.
The piloerection response they mediate is considered a vestigial physiological reflex in Homo sapiens.
- D.
They represent an evolutionary retention of a mechanism originally selected for insulation and intimidation in mammalian ancestors.
Check Your Answer
Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Evolutionary_Exception
Tackle problems where standard rules evolve or change based on specific environmental constraints.
Concepts Behind This Question
Vestigial_Organs_Interpretation|Smooth_Muscle_Differentiation|Evolutionary_Adaptation
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often confuse the mechanism of heat generation (shivering thermogenesis via skeletal/somatic muscles) with heat retention (piloerection via smooth/autonomic muscles).
Furthermore, it tests the integration of Structural Organization (smooth muscle histology/innervation) with Evolution (vestigial traits).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Locomotion and Movement - Class 11 |
| Concept | Muscle Type Differentiation |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |