Understanding Muscle Tissue and Physiology

What are the three types of muscle tissue?

• Skeletal, Cardiac, and Smooth

• Skeletal, Cardiac, and Nervous

• Cardiac, Smooth, and Connective

• Smooth, Connective, and Nervous

Which type of muscle tissue is responsible for voluntary movement?

• Cardiac Muscle

• Smooth Muscle

• Skeletal Muscle

• Nervous Tissue

What is the function of the epimysium in skeletal muscle?

• Surrounds individual muscle fibers

• Divides muscles into fascicles

• Surrounds the entire muscle

• Stores calcium ions

Which connective tissue layer divides skeletal muscles into fascicles?

• Epimysium

• Perimysium

• Endomysium

• Sarcolemma

What is the role of the sarcolemma in a muscle fiber?

• Stores calcium ions

• Surrounds the entire muscle

• Cell membrane of a muscle fiber

• Divides muscles into compartments

What is the primary component of thick filaments in myofibrils?

• Actin

• Myosin

• Tropomyosin

• Troponin

What is the function of the terminal cisternae in the sarcoplasmic reticulum?

• Forms cross-bridges with actin

• Stores calcium ions

• Covers active sites on actin

• Holds tropomyosin in place

What is the combination of a pair of terminal cisternae and a T-tubule called?

• Sarcomere

• Myofibril

• Triad

• Fascicle

Which protein prevents actin-myosin interactions by covering active sites on actin?

• Myosin

• Actin

• Tropomyosin

• Troponin

What is the primary function of troponin in muscle contraction?

• Interacts with myosin heads

• Holds tropomyosin in place

• Stores calcium ions

• Forms cross-bridges