QuestionAugust 10, 2025

The type of muscle fibers that have only a single nucleus, both thick and thin filaments, but no Z discs, are: 1) skeletal. 2) cardiac. 3) smooth. 4) cardiac and smooth.

The type of muscle fibers that have only a single nucleus, both thick and thin filaments, but no Z discs, are: 1) skeletal. 2) cardiac. 3) smooth. 4) cardiac and smooth.
The type of muscle fibers that have only a single nucleus, both thick and thin
filaments, but no Z discs, are:
1) skeletal.
2) cardiac.
3) smooth.
4) cardiac and smooth.

Solution
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Answer

3) smooth. Explanation 1. Identify muscle fiber characteristics Smooth muscle fibers have a single nucleus, contain thick and thin filaments, but lack Z discs.

Explanation

1. Identify muscle fiber characteristics<br /> Smooth muscle fibers have a single nucleus, contain thick and thin filaments, but lack Z discs.
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