Question

1. the three types of muscle tissue exhibit certain similarities and differences. check (✓) the appropriate spaces in the following table to indicate which muscle types exhibit each characteristic.

characteristic\tskeletal\tcardiac\tsmooth

1. voluntarily controlled
2. involuntarily controlled
3. banded appearance
4. single nucleus in each cell
5. multinucleate
6. found attached to bones
7. allows you to direct your eyeballs
8. found in the walls of stomach, uterus, and arteries
9. contains spindle - shaped cells
10. contains cylindrical cells with branching ends
11. contains long, nonbranching cylindrical cells
12. displays intercalated discs
13. concerned with locomotion of the body as a whole
14. changes the internal volume of an organ as it contracts
15. tissue of the circulatory pump

Explanation:

1. Voluntarily controlled: Skeletal muscle is under conscious control. Cardiac and smooth are involuntary.
2. Involuntarily controlled: Cardiac and smooth muscle function without conscious thought.
3. Banded appearance: Skeletal and cardiac muscle have a striated (banded) look due to myofibril arrangement.
4. Single nucleus in each cell: Smooth and cardiac muscle cells usually have one nucleus.
5. Multinucleate: Skeletal muscle cells are multinucleated.
6. Found attached to bones: Skeletal muscle attaches to bones via tendons.
7. Allows you to direct your eyeballs: Skeletal muscles control eye - movement.
8. Found in the walls of stomach, uterus, and arteries: Smooth muscle is present in these organs.
9. Contains spindle - shaped cells: Smooth muscle cells are spindle - shaped.
10. Contains cylindrical cells with branching ends: Cardiac muscle cells have this structure.
11. Contains long, nonbranching cylindrical cells: Skeletal muscle cells are long and non - branching.
12. Displays intercalated discs: Intercalated discs are unique to cardiac muscle.
13. Concerned with locomotion of the body as a whole: Skeletal muscle is responsible for body movement.
14. Changes the internal volume of an organ as it contracts: Smooth muscle in organs like stomach and uterus does this.
15. Tissue of the circulatory pump: Cardiac muscle makes up the heart (circulatory pump).

Answer:

Characteristic	Skeletal	Cardiac	Smooth
2. Involuntarily controlled		√	√
3. Banded appearance	√	√
4. Single nucleus in each cell		√	√
5. Multinucleate	√
6. Found attached to bones	√
7. Allows you to direct your eyeballs	√
8. Found in the walls of stomach, uterus, and arteries			√
9. Contains spindle - shaped cells			√
10. Contains cylindrical cells with branching ends		√
11. Contains long, nonbranching cylindrical cells	√
12. Displays intercalated discs		√
13. Concerned with locomotion of the body as a whole	√
14. Changes the internal volume of an organ as it contracts			√
15. Tissue of the circulatory pump		√