Why does a person with muscles that have a higher percentage of slow fibers have greater endurance than a person with muscles that have a lower percentage of slow fibers?

Q: In skeletal muscle contraction, calcium ions apparently act to:   Question 8 options:   a)  block…

A: In skeletal muscle contraction, the thin filaments are pulled which then slide past the thick…

Q: why does a person with muscles that have a higher percentage  of slow fibers have greater endurance…

A: Muscles are basically a tissue type consisting of subunits called myofibrils. Along with bones…

Q: During a single muscle twitch, the sarcomeres within a muscle contract maximally. How can you…

A: A contraction of muscle fibers generate when an action potential pass down the motor neurons. A…

Q: What must occur for a muscle to relax?

A: Actin (spherical) and myosin (motor) are the major proteins in the muscles. Actin monomers aggregate…

Q: How is smooth muscle contraction similar to skeletal musclecontraction?

A: Smooth muscle fibers are generally found in the walls of various visceral organs except the heart,…

Q: Explain the following two statements: Muscles can only actively contract; muscle fibers lengthen…

A: The statements "muscles can only actively contract" and "muscle fibers lengthen passively" are…

Q: How is muscle contraction stopped? Which of the following is/are correct?   A) The brain stops…

A: The process of muscle contraction is a sequence of events that are responsible for the contraction…

Q: According to the sliding filament mechanism of skeletal muscle contraction, during contraction: The…

A: The myofibrils of skeletal muscles contain alternatingly dark and light bands. The dark band is…

Q: What happened to the number of fibers contracting as you increased the voltage? b) In light of the…

A: In physiology if a isolated muscle fibre /motor neuron is stimulated, it will consistently offers a…

Q: What is an example of a muscle that is not part of an antagonistic pair?

A: A muscle is considered as a soft tissue present in most animals and Humans. The muscle is mesodermal…

Q: Why do endurance sports require a high proportion of slow-twitchmuscle fibers, whereas power sports…

A: Introduction: Examples of endurance sports including running, biking, swimming. Such sports need…

Q: To demonstrate muscle fatigue, a student held an 8 lb dumbbell in her hand and abducted her arm…

A: Ans - the correct answer for the above question is- A) Different motor units were contracting while…

Q: Which type of contraction develops more muscle tension: isotonic or isometric?

A: Muscles are the tissues that can change their length and cause movement of the body parts.

Q: Muscle spindles are the sensory receptors that monitor the length of skeletal muscles. When the…

A: The muscles are involved in movements happening in an organism. These movements can be voluntary or…

Q: distinguish between fast-twitch and slow-twitch muscles?

A: The soft tissue which is responsible for activities like locomotion, change of posture, contraction…

Q: Given what you have learned from the first experiment, you prepare the other leg for a fresh…

A: Curare," which is a class of drugs that block nicotinic acetylcholine receptors (nAChRs) located on…

Q: What are the two neurotransmitters involved in excitation and inhibitation of muscles?

A: A neurotransmitter is a chemical signal that transports, amplifies, and balances signals between…

Q: How does the timing of a stimulus impact the tension produced by the resulting muscle contraction?

A: Skeletal muscles contract and relax to mechanically move the body. Messages from the nervous system…

Q: Fast twitch muscle fibers are characterized by all of the following EXCEPT: O a) fatigue resistant…

A: Fast twitch muscle fiber contracts quickly especially during high-intensity physical activity or…

Q: Which of the following is correct about muscle spindles?

A: Sensory receptors are specialised cells or multicellular structures that sense changes in both the…

Q: Explain how an impulse on a motor neuron can trigger a muscle contraction.

A: Nervous system coordinates and controls the activities of the animals. It is responsible for…

Q: muscle spidnles are _____ receptors and provide ____ information, whereas golgi tendon organs…

A: The majority of skeletal muscles contain this stretch receptor, which is widely distributed. When a…

Q: The following are the basic steps of a muscle contraction:               I.  Neurotransmitters bind…

A: Muscle tissue is responsible for movement. There are found three types of muscles: Skeletal,…

Q: When electrically stimulating a skeletal muscle and measuring the force of muscle contraction, which…

A: A skeletal muscle needs an action potential to be trigger contraction of the muscle fibers. The…

Q: what do you think will happen if muscles are required to contract over a period of time?

A: The contraction and relaxation of muscles give rise to movement in the body. The contraction of a…

Q: If Ca2+ pumps of the sarcoplasmic reticula fail to function, what will happen to the tension…

A: Muscle is a soft tissue like structure which is primarily responsible for the movement in the body.…

Q: You find yourself running away from a pack of zombies in the snow. These zombies aren't very fast…

A: Running mostly works muscles in the lower body like the glutes, hamstrings, and quads. Running also…

Q: what are the events that initiate muscle contraction in order?  start with the neurotransmitter…

A: A Muscle Contraction Is Triggered When an Action Potential Travels Along the Nerves to the Muscles.

Q: Which of these events occurs during the team phase, just when a muscle has been stimulated? a) Ca2…

A: Muscle stimulation The muscle contraction is stimulated by the action potential that traveled along…

Q: When you “max out” on reps or pushups or something like that, what kind of stimulus is your brain…

A: Exercise builds and strengthens muscles, which can protect the bones from injury, and support and…

Q: What do you mean by innervation of smooth muscles?

A: Smooth muscles are present all over the body. They are involuntary in functions and are non-striated…

Q: Skeletal muscle contraction is influenced by A) frequency of stimulation B) calcium release from the…

A: The muscular system allows body movements and maintains body posture. It includes skeletal, smooth,…

Q: In the process of muscle contraction, which of the following steps immediately comes after the…

A: Muscle contraction can be defined as the activation of tension-generating sites within muscle…

Q: What would happen without input from gamma motor neurons? A) Information about velocity would…

A: Intrafusal fibers are specialized muscle fibers. They are found in the muscle spindles. Muscle…

Q: What happens inside a muscle to cause that increase in strength to happen over time?

A: Muscle strength means the power of the muscles to perform various activities. For providing…

Q: How does preload in an isolated muscle preparation relate to muscle tone in an intact organism?

A: Introduction: When an external force is exerted to the relaxed phase of contraction, the stress,…

Q: Why will an increase in the strength of a stimulus cause an increase in the force of contraction in…

A: Stimulus: A stimulus in physiology is a change in the physical or chemical structure of an…

Q: Describe the processes by which muscles obtain the energy to power contractions.

A: Muscles are tissues of the body that helps in contractions that further aids in movement. These…

Q: If individual muscle fibers always contract the entire way when stimulated, how are we able to…

A: A muscle fiber is a long cylindrical cell with multiple oval nuclei just beneath its sarcolemma or…

Q: Why would a sprinter experience muscle fatigue before a marathon runner would?

A: Muscles are required in breathing, talking, running, walking, and anybody movement. Actin and…

Q: During muscle contraction, the ion that leaks out of the sarcoplasmic reticulum and induces…

A: Ions of calcium diffuse through muscle fibres. The contraction occurs as the relationship between…