Question at position 2 Which of the following does not belong with the others?StriatedInvoluntaryMultinucleatedSkeletal单项选择题
A
Striated
B
Involuntary
C
Multinucleated
D
Skeletal

Question

Question at position 2 Which of the following does not belong with the others?StriatedInvoluntaryMultinucleatedSkeletal

BlackTom AI · Accepted Answer

Skeletal muscle fibers are striated and multinucleated, and they are under voluntary control, so "Involuntary" is the odd one out.

1) Relevant knowledge points and concepts
- Skeletal muscle: long, cylindrical fibers with obvious cross-striations (striated) and many peripheral nuclei (multinucleated); controlled consciously (voluntary).
- Cardiac muscle: striated and involuntary, usually one central nucleus per cell (sometimes two).
- Smooth muscle: non-striated, involuntary, single central nucleus.
Understanding these traits lets us classify which terms describe skeletal muscle.

2) Step-by-step reasoning
- Examine each option in relation to skeletal muscle:
  - Striated: skeletal muscle shows striations (alternating dark/light bands) — fits.
  - Multinucleated: skeletal muscle fibers form by fusion of myoblasts, producing many nuclei per fiber — fits.
  - Skeletal: this is the muscle type being described — fits as the category.
  - Involuntary: skeletal muscle is controlled consciously (voluntary), so "involuntary" does not fit.

3) Calculations/intermediate steps
- Not applicable; this is a classification/definition problem. The intermediate logic is the mapping of each adjective to the known properties of skeletal muscle.

4) Why the correct answer is correct
- "Involuntary" conflicts with the defining control characteristic of skeletal muscle. Since the other terms (striated, multinucleated, skeletal) all describe the same muscle type, "Involuntary" is the only term that does not belong.

5) Why the other options are incorrect
- Striated: correctly describes skeletal muscle’s banded appearance.
- Multinucleated: correctly describes skeletal muscle fibers having many nuclei.
- Skeletal: names the muscle type that the other descriptors apply to.
Each of these three terms is consistent with skeletal muscle, so they belong together.

6) Conclusion
- Therefore the term that does not belong is "Involuntary," which matches the provided correct answer.

Question at position 2 Which of the following does not belong with the others?StriatedInvoluntaryMultinucleatedSkeletal单项选择题

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