Muscle Physiology Quiz

What is the role of muscles in heat production?

• Muscles generate heat through contraction, helping regulate body temperature.

• Muscles absorb heat from the environment to maintain body temperature.

• Muscles transfer heat to the skin surface for cooling.

• Muscles store heat in the form of chemical energy.

Why are antagonist muscles important?

• They work in opposition to agonist muscles to control movement and maintain balance.

• They are the primary muscles responsible for movement.

• They help in the storage of calcium ions required for muscle contraction.

• They transmit action potentials deep into the muscle fiber.

What is the function of the sarcoplasmic reticulum in muscle cells?

• It divides the muscle into bundles of muscle fibers called fascicles.

• It surrounds the entire muscle, providing structural integrity.

• It stores calcium ions required for muscle contraction.

• It contains sarcomeres, the functional units of muscle contraction.

What do T-tubules do in muscle fibers?

• They surround the entire muscle, providing structural integrity.

• They transmit action potentials deep into the muscle fiber, facilitating synchronous muscle contraction.

• They store calcium ions required for muscle contraction.

• They divide the muscle into bundles of muscle fibers called fascicles.

What is the role of the epimysium?

• It stores calcium ions required for muscle contraction.

• It transmits action potentials deep into the muscle fiber.

• It surrounds the entire muscle, providing structural integrity and transmitting force.

• It divides the muscle into bundles of muscle fibers called fascicles.

What is the role of the perimysium?

• It surrounds the entire muscle, providing structural integrity.

• It transmits action potentials deep into the muscle fiber.

• It stores calcium ions required for muscle contraction.

• It divides the muscle into bundles of muscle fibers called fascicles.

Which type of muscle cells are spindle-shaped, uninucleated, lack striations, and are found in the walls of hollow organs like the digestive tract and blood vessels?

• Skeletal muscle cells

• Cardiac muscle cells

• Smooth muscle cells

• Myofibril cells

What is the role of the endomysium in muscle fibers?

• It provides structural support to the muscle cells.

• It surrounds individual muscle fibers, facilitating nutrient exchange.

• It is responsible for the contraction of muscle fibers.

• It connects muscle fibers to bones.

What is the basic structure that is crucial for the control of crossbridge formation in muscle contraction?

• Sarcomere

• Myofibril

• Endomysium

• Motor unit

What is the process of converting an electric signal to a chemical signal at the neuromuscular junction known as?

• Muscle activation

• Muscle contraction

• Muscle relaxation

• Muscle regeneration