Smooth muscle is

Question

Smooth muscle is

BlackTom AI · Accepted Answer

When evaluating the options for smooth muscle characteristics, I’ll consider the key features that define smooth muscle tissue in the human body.
Option 1: 'multinucleated' — This trait is typically associated with skeletal muscle fibers, which are large and contain multiple nuclei per cell. Smooth muscle cells are not multinucleated; they are single-nucleated, so this statement is incorrect for smooth muscle.
Option 2: 'striated' — Striations are the banded appearance seen in skeletal and cardiac muscle due to the regular arrangement of actin and myosin filaments. Smooth muscle lacks these visible striations because its contractile filaments are arranged differently. Therefore, this option is inaccurate for smooth muscle.
Option 3: 'involuntary' — Smooth muscle contractions are not under voluntary control; they are regulated by the autonomic nervous system and various local factors. This is a hallmark feature of smooth muscle tissue, making this option correct.
Option 4: 'branched' — Branching is a characteristic more associated with cardiac muscle cells, which form a network with intercalated discs and can exhibit branching. Smooth muscle cells are spindle-shaped and do not branch, so this option does not describe smooth muscle.
Overall, the correct description for smooth muscle among the given choices is that it is involuntary, aligning with its autonomic regulation and lack of conscious control.

BIOL-2401-099 A&P I Exam 3 Electrically Excitable Tissues- Requires Respondus LockDown Browser

Smooth muscle is

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