Questions: Which muscle type, through involuntary control, helps to expel urine from the bladder and feces from the digestive tract? Multiple Choice Skeletal muscle Cardiac muscle Smooth muscle

The answer is the third one (or C): Smooth muscle.

Explanation for each option:

1. Skeletal muscle: This type of muscle is under voluntary control, meaning we consciously control its movements. It is primarily responsible for movements of the skeleton and is not involved in the involuntary expulsion of urine or feces.

2. Cardiac muscle: This muscle type is found only in the heart and is responsible for pumping blood throughout the body. It operates involuntarily but is not involved in the expulsion of urine or feces.

3. Smooth muscle: This muscle type is found in the walls of internal organs such as the bladder and the digestive tract. It operates involuntarily and is responsible for the movements that expel urine from the bladder and feces from the digestive tract.

Summary: Smooth muscle, through involuntary control, helps to expel urine from the bladder and feces from the digestive tract.