Chickens are capable of only brief bursts of flight, and their flying muscles consist of fast glycolytic fibers. The breast muscles of ducks, by contrast, consist of slow and fast oxidative fibers. What can you deduce about the flying abilities of ducks?

Q: Compare the composition of flight muscles with a powerful locomotive muscle in terms of…

A: Flight muscles are a type of muscle which is found in birds or insects. This muscle helps birds or…

Q: Muscles that are immobilized for long periods of time, as with a cast, frequently get smaller. Why?…

A: The reduction in muscle mass due to temporary immobilization is called muscle atrophy. It may be…

Q: When a person dies, the body often experiences rigor mortis. In this condition, it is as if the…

A: Postmortem changes resulting in the stiffeness of the body muscles due to chemical changes in their…

Q: Without ATP, relaxed muscle cannot contract and a contracted muscle cannot relax. Explain why.

A: The actin and myosin filaments are linked with several types of cell movements. The myosin converts…

Q: Why do previously trained muscles adapt more quickly to retraining after a period of disuse ?

A: There are a total of  639 muscles in the human body. Each muscle is of different use. There are…

Q: Would you expect jaguars, cheetahs, and other great cats to have mostly slow-twitch, nonfatiguing…

A: The soft-tissues found in animals that are accountable for the movement are called “muscles”. They…

Q: explain why a person bringing 50 kg sack of rice will not move in the same speed and duration as one…

A: There are a variety of functions that a human needs to perform. Each function requires a different…

Q: Explain the characteristics of these muscle fibers: slow twitch, fast twitch oxidative and fast…

A: Skeletal muscle fibers are striated tissues. These tissues are under the control of the somatic…

Q: ___ fibers can temporarily store ___ in myoglobin. a. Fast-twitch . . . ATP b. Slow-twitch . . .…

A: Answer: Introduction: Skeletal muscles formed by distinct muscle fibers. And like muscles…

Q: What happens when a muscle cell cannot generate enough ATP byaerobic respiration?

A: When a cell is very low on ATP, it will start squeezing more ATP out of ADP molecules by converting…

Q: During contraction, where does the calcium that binds to troponin come from

A: Muscles are made up of two main protein filaments namely, a thick filament that is made up of a…

Q: What are some adaptations/specializations that we see in skeletal muscle fibers that increase their…

A: Muscle cells are specific for contraction. It allows for motions and facilitates bodily processes…

Q: Myofibis in muscle fibres are made up of repeating units of dark and light bonds called

A: Myofibril is a muscle cell that is shaped like a rod. Many chains of Myofibril bound together to…

Q: Describe the events by which depolarization of a smooth muscle cell results in contraction and…

A: Smooth muscle is a kind of muscle that is used by various systems to apply pressure on organs and…

Q: What fuel molecules are metabolized to produce ATP duringskeletal muscle activity?

A: Four major types of tissues in human body are – muscle, nervous, epithelial and connective. Three…

Q: Make a table comparing three structural and three functional properties of skeletal,  smooth and…

A: Answer.

Q: Why take magnesium when cramping a muscle

A: A muscle cramp is an involuntarily and forcibly contracted muscle that does not relax. These are…

Q: Unlike skeletal muscle smooth muscle Mayer spontaneously contract when it is. What feature of smooth…

A: Smooth muscle is a non-striated muscle, divided into two groups; single unit and multiunit smooth…

Q: •What is the role of tropomyosin in muscle contraction?

A: Tropomyosin prevent myosin from continuing to slide up the actin filament.

Q: The muscles of a recently deceased human can remain in a contracted state, termed rigor mortis, for…

A: Rigor mortis: It is one of the recognizable signs of death , caused by chemical changes in the…

Q: In most fish, the bulk of the trunk muscles are fast glycolytic, which are not used for steady…

A: Introduction :- The metabolic mechanism that transforms glucose to pyruvic acid is known as…

Q: Muscle contraction is not the only process controlled in temperature-regulating reflexes. True or…

A: Muscle contraction is considered as the process, in which tension develops in the site present in…

Q: Muscles that maintain posture are composed primarily of what type of skeletal muscle fibers?

A: Skeletal muscle fibre basically refers to the multiple bundles of the fibres that are joined…

Q: Muscles vary greatly in terms of their endurance. The gluteus medias is an important stabilizer…

A: The ability of a muscle group or individual muscle to undergo repeated contractions for a long time…

Q: If we need ATP for both contraction and relaxation, how would you explain why rigor mortis appears…

A: Rigor mortis is the onset of stiffness in the dead body several hours after the person dies. It is a…

Q: When using muscles how do you generate more tension when picking up a heavier object than you do…

A: The amount of tension produced by muscles depends on the cross-sectional area of the muscle fiber…

Q: Type I of muscle fibers are utilize both oxidative metabolism O and anaerobic glycolysis O utilize…

A: The three types of muscle fibres are slow oxidative (SO), fast oxidative (FO) and fast glycolytic…

Q: How would muscle contractions be affected if skeletalmuscle fibers did not have T-tubules?

A: Muscles:                    In animals, soft tissues found known as muscles. Muscles cells contain…

Q: Which is true for striated muscles? a) may have spontaneous activity b) is not under the control…

A: Muscle are group of cells which perfom a specific function. They are responsible for movement. They…

Q: Based on what you know about the neuromuscular junction and muscle contraction, describe very…

A: The neuromuscular junction is The portion at which the neuron axon terminal meets the skeletal…

Q: Most of the muscles of the skeleton are attached to areas very close to the joints, so their arms,…

A: *During muscle contracts and shortens  against a load  it will perform work and it will be done by…

Q: why does a rapid series of muscle twitches yield a stronger overall contraction than a single…

A: Muscle contraction that results from a single action potential is called a twitch. When there is a…

Q: Why does a motor unit of the eye have few musclefibers compared to a motor unit of the leg?

A: Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and…

Q: The filaments of skeletal muscle are moved by free energy derived from the hydrolysis of ATP. During…

A: During anaerobic glycolysis, glucose is decomposed into lactic acid and releases energy. In the…

Q: Why is it in the muscle’s best interest to export lactic acid into the blood during intense…

A: Lactic acid, also known as lactate, is a chemical byproduct of anaerobic respiration, which is…

Q: Why might stretching a cramping muscle INCREASE the cramping, as well as why would contracting the…

A: In the human body, the painful involuntary contraction of a muscle, as a result of dehydration,…

Q: The ocular muscle is an example of: a. Slow twitch muscle O b. Fast tetanus muscle C. Slow tetanus…

A: Ocular muscle has a unique slow non  twitch  , fatigue resistant muscle fiber    Its a  slow twitch…

Q: Regarding the muscles, why electric impulses are important in the contraction mechanisms? Explain.

A: Neuromuscular junction or NMJ is accountable for the transfer of electrical signals from the neurons…

Q: How is a muscle cell excited and why does it lead to a contraction in the muscle?

A: Excitation for Muscle Contraction:  ∙ Nerve impulse advances arrival of Neurotransmitter…

Q: How do muscles convert the chemical energy of ATP into force and movement during a contraction?

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

Q: A potential benefit of recruiting slow oxidative fibers for contraction before recruiting fast…

A: In skeletal muscle fibers, contraction in Slow oxidative (SO) fibers is relatively slow and use…

Q: Explain how microscopic and macroscopic anchoring of musclefilaments enables you to bend your elbow

A: Muscles are connective tissues that along with the skeletal system help in voluntary and involuntary…

Q: Skeletal muscles can only produce a mechanical force as they are contracted, but a leg flexes and…

A: The force exerted by the muscle is less than its maximum in a concentric contraction, and the muscle…

Q: What will happen to the muscle if ATP was added, then salt? Explain

A: Muscles are the tissues that consists of longitudinal cells that helps in the movement in the body.…

Spheres of physical activity

The spheres of physical activity experience include aspects of everyday life where physical activity is important. In general, the spheres recognize various purposes of physical activity in different contexts. The spheres of physical activity provide a broad basis for assessing the significance and prevalence of physical activity. There are seven spheres of physical activity experience.