16. Which of the following muscle types provides contractile force for internal organs?a. Roughb. Smoothc. Skeletald. Cardiace. Striated

Step 1: Identify the Question

The question is asking about which type of muscle provides contractile force for internal organs.

Step 2: Analyze the Muscle Types

1. Rough: Not a type of muscle tissue.
2. Smooth: This type is found in the walls of internal organs and is responsible for involuntary movements.
3. Skeletal: This muscle type is attached to bones and is under voluntary control, not generally responsible for internal organ function.
4. Cardiac: This muscle type makes up the heart and is also involuntary, but it specifically pertains to the heart rather than internal organs.
5. Striated: This refers to skeletal and cardiac muscles, which have a banded appearance but isn't a type of muscle that specifically indicates function for internal organs.

Step 3: Conclusion

Based on the analysis, the muscle type that provides contractile force for internal organs is smooth muscle.

Final Answer

b. Smooth