18 Questions
What type of protein filaments are found in sarcomeres of skeletal muscles?
Myosin and actin
Which type of muscle tissue has spindle-shaped cells and is involuntary in function?
Smooth muscles
What is the function of cardiac muscles in the body?
Pumping
In which type of muscles is the nucleus located near the center of the cell?
Cardiac muscles
What provides support and organization to muscle fibers in skeletal muscles?
Connective tissue coverings
Which type of muscle generates heat to maintain body temperature?
Skeletal muscles
Which of the following is NOT a function of skeletal muscles?
Producing hormones
What is the primary role of skeletal muscles when maintaining posture and body position?
Making fine adjustments
Which type of muscle has smooth muscle cells that lack striations and have a single, centrally located nucleus?
Smooth muscle
What is a significant by-product of muscle metabolism?
Heat
Where are smooth muscles found in the human body?
In the walls of hollow organs and structures like blood vessels
What role do skeletal muscles play in providing nutrient reserves?
Breaking down proteins during fasting
What type of muscle movement does smooth muscle produce in the digestive tract?
Slow, sustained contractions
Which part of the body does smooth muscle contribute to in maintaining posture?
Blood vessels
What role does smooth muscle play in supporting the structure of internal organs?
Regulating the size of internal spaces
How does smooth muscle contribute to maintaining body temperature?
Generating heat through sustained muscle contractions
How are smooth muscle cells structured to enable coordinated movement?
Sheets or layers
Which mechanism initiates smooth muscle contraction?
Calcium ions binding to calmodulin
Learn about the organization, contraction, and function of smooth muscle cells. Understand how smooth muscle cells work together to produce movements like peristalsis and regulate blood flow. Explore the differences between smooth muscle and skeletal muscle contraction.
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