Podcast
Questions and Answers
Which connective tissue covering surrounds the entire muscle to hold it together and give it shape?
Which connective tissue covering surrounds the entire muscle to hold it together and give it shape?
- Perimysium
- Endomysium
- Sarcolemma
- Epimysium (correct)
What is the basic functional unit of the myofibril?
What is the basic functional unit of the myofibril?
- Fascicles
- Muscle fibers
- Sarcomeres (correct)
- Tendons
Which plasma membrane surrounds an individual muscle fiber?
Which plasma membrane surrounds an individual muscle fiber?
- Perimysium
- Epimysium
- Sarcolemma (correct)
- Plasmalemma
Which protein is responsible for positioning the myosin filament and maintaining equal spacing between the actin filaments in the sarcomere?
Which protein is responsible for positioning the myosin filament and maintaining equal spacing between the actin filaments in the sarcomere?
What is the role of titin in muscle contraction?
What is the role of titin in muscle contraction?
What is the primary protein of the thick filament in the sarcomere?
What is the primary protein of the thick filament in the sarcomere?
Which type of fibers showed a large increase after resistance exercise training in untrained young men and women?
Which type of fibers showed a large increase after resistance exercise training in untrained young men and women?
What type of fibers increased in prevalence after training for a marathon?
What type of fibers increased in prevalence after training for a marathon?
What is the function of the plasmalemma in muscle fibers?
What is the function of the plasmalemma in muscle fibers?
Which protein is primarily responsible for the dark A-band in a sarcomere?
Which protein is primarily responsible for the dark A-band in a sarcomere?
What is the function of the M-line in a sarcomere?
What is the function of the M-line in a sarcomere?
Which protein forms the backbone of the thin filament in a sarcomere?
Which protein forms the backbone of the thin filament in a sarcomere?
Which type of muscle is found in the walls of most blood vessels and allows for vessel constriction or dilation to regulate blood flow?
Which type of muscle is found in the walls of most blood vessels and allows for vessel constriction or dilation to regulate blood flow?
Which type of muscle is found only in the heart and composes the vast majority of the heart's structure?
Which type of muscle is found only in the heart and composes the vast majority of the heart's structure?
Which type of muscle is under conscious control and is named because most attach to and move the skeleton?
Which type of muscle is under conscious control and is named because most attach to and move the skeleton?
Which of the following statements accurately describes the neuromuscular junction?
Which of the following statements accurately describes the neuromuscular junction?
What is the term used to describe the process that triggers a muscle fiber to contract?
What is the term used to describe the process that triggers a muscle fiber to contract?
What is the role of calcium in the muscle fiber during the contraction process?
What is the role of calcium in the muscle fiber during the contraction process?
Which of the following is the correct sequence of events that leads to muscle contraction?
Which of the following is the correct sequence of events that leads to muscle contraction?
What happens when an α-motor neuron is activated?
What happens when an α-motor neuron is activated?
What is the role of ACh in muscle contraction?
What is the role of ACh in muscle contraction?
What happens during muscle contraction?
What happens during muscle contraction?
What is the H-zone?
What is the H-zone?
What is excitation-contraction coupling?
What is excitation-contraction coupling?
What happens if the muscle cell is sufficiently depolarized?
What happens if the muscle cell is sufficiently depolarized?
Which type of muscle fibers showed a decrease in prevalence after resistance exercise training in untrained young men and women?
Which type of muscle fibers showed a decrease in prevalence after resistance exercise training in untrained young men and women?
Which type of muscle fibers showed an increase in prevalence after training for a marathon?
Which type of muscle fibers showed an increase in prevalence after training for a marathon?
What is the function of the sarcoplasmic reticulum (SR) in a muscle fiber?
What is the function of the sarcoplasmic reticulum (SR) in a muscle fiber?
Which type of muscle is under conscious control and is named because most attach to and move the skeleton?
Which type of muscle is under conscious control and is named because most attach to and move the skeleton?
What is the function of smooth muscle?
What is the function of smooth muscle?
What is the primary characteristic of cardiac muscle?
What is the primary characteristic of cardiac muscle?
Which protein is primarily responsible for the dark A-band in a sarcomere?
Which protein is primarily responsible for the dark A-band in a sarcomere?
What is the function of the M-line in a sarcomere?
What is the function of the M-line in a sarcomere?
What is the role of titin in muscle contraction?
What is the role of titin in muscle contraction?
Which protein is responsible for positioning the myosin filament and maintaining equal spacing between the actin filaments in the sarcomere?
Which protein is responsible for positioning the myosin filament and maintaining equal spacing between the actin filaments in the sarcomere?
What is the primary function of titin in muscle contraction?
What is the primary function of titin in muscle contraction?
What is the role of calcium in the activation of titin during muscle contraction?
What is the role of calcium in the activation of titin during muscle contraction?
Which of the following is the correct sequence of connective tissues surrounding a muscle fiber, from outermost to innermost?
Which of the following is the correct sequence of connective tissues surrounding a muscle fiber, from outermost to innermost?
What is the function of tendons in muscle fibers?
What is the function of tendons in muscle fibers?
What is the role of hybrid muscle fibers in skeletal muscles?
What is the role of hybrid muscle fibers in skeletal muscles?
Which of the following is the correct sequence of events that leads to muscle contraction?
Which of the following is the correct sequence of events that leads to muscle contraction?
What is the primary protein of the thick filament in the sarcomere?
What is the primary protein of the thick filament in the sarcomere?
What is the function of the plasmalemma in muscle fibers?
What is the function of the plasmalemma in muscle fibers?
Which of the following is responsible for the movement of the thin filaments towards the center of the sarcomere during muscle contraction?
Which of the following is responsible for the movement of the thin filaments towards the center of the sarcomere during muscle contraction?
What happens when the H-zone overlaps and is no longer visible?
What happens when the H-zone overlaps and is no longer visible?
What is the sequence of events that starts with a motor nerve impulse and results in muscle contraction called?
What is the sequence of events that starts with a motor nerve impulse and results in muscle contraction called?
What is the role of ACh in muscle contraction?
What is the role of ACh in muscle contraction?
What happens when an α-motor neuron is activated?
What happens when an α-motor neuron is activated?
What is the primary protein of the thick filament in the sarcomere?
What is the primary protein of the thick filament in the sarcomere?
What is the role of calcium in the muscle fiber during the contraction process?
What is the role of calcium in the muscle fiber during the contraction process?
