A common characteristic of the three types of muscle tissue is/are that (check all that apply) they all have striations

A common characteristic of the three types of muscle tissue is/are that (check all that apply) they all have striations. they all depend on actin and myosin for contraction. they all are multinucleated. they all are involuntary muscles. the all have muscle cells that branch. they all can have their cells shorten and generate contracting force.

The correct answer and explanation is:

The correct answers are:

• They all depend on actin and myosin for contraction.
• They all can have their cells shorten and generate contracting force.

Explanation:

Muscle tissues—skeletal, cardiac, and smooth—share some common characteristics due to their role in facilitating movement and force generation. However, they also have distinct structural and functional differences. Let’s break down the answers:

1. They all depend on actin and myosin for contraction:
   All muscle types rely on the interaction between actin and myosin, two proteins essential for muscle contraction. This mechanism, known as the sliding filament theory, is universal among muscle tissues. Actin and myosin form cross-bridges, which pull actin filaments to shorten the muscle cell, generating tension.
2. They all have striations:
   This is incorrect because not all muscle types have striations. Skeletal and cardiac muscles have a striated appearance due to the organized arrangement of actin and myosin into sarcomeres. However, smooth muscle lacks striations because its filaments are not organized in the same way.
3. They all are multinucleated:
   This is incorrect because only skeletal muscle cells are typically multinucleated. Cardiac muscle cells usually have one or two nuclei, and smooth muscle cells are uninucleated.
4. They all are involuntary muscles:
   This is incorrect because skeletal muscle is under voluntary control, while cardiac and smooth muscles are involuntary.
5. They all have muscle cells that branch:
   This is incorrect because only cardiac muscle cells exhibit branching. Skeletal and smooth muscle cells are not branched.
6. They all can have their cells shorten and generate contracting force:
   This is correct because contraction is a defining feature of all muscle tissues. While the control and mechanism may differ, the ability to shorten and generate force is universal among muscle types.

In summary, actin-myosin interaction and the ability to generate force through contraction are shared by all muscle tissues, while structural and control differences distinguish them.