Calcium is the trigger for contraction of all muscle types. How does its binding site differ in skeletal and smooth muscle fibers?

Q: Contrast the role of Ca2+in the contraction of a skeletalmuscle fiber and a smooth muscle cell.

A: Muscles are soft tissues present in most animals. They contain protein filaments called actin and…

Q: What are two roles of ATP during muscle contraction?

A: Muscle contraction is either increase in muscle tension or a decrease in the muscle length. Muscle…

Q: A typical relaxed sarcomere is about 2.3 um in length and contracts to about 2 um in length. Within…

A: a) To find: The overlap of thick and thin filaments in the relaxed and contracted sarcomere

Q: How does contraction differ in smooth muscle cells and skeletal muscle fibers?

A: The muscles which perform involuntary functions and shape of the cells are spindle-like is called…

Q: (a) Describe the structure of a sarcomere and indicate the relationship of the sarcomere to…

A: NOTE:- "As you have posted two parts under one, we will solve the first part for you, to get the…

Q: f a muscle cell had very short T-tubules, how much tension would the muscle fiber create, relative…

A: T tubules or the transverse tubules are the extensions of the cell membrane that penetrate into the…

Q: During evolution, skeletal muscle became adapted to functional de-mands ranging from sudden,…

A: The skeletal muscles of vertebrates are composed of different types of fibers. This includes slow…

Q: How does the arrangement of myofilaments produce the characteristic striations of skeletal muscle…

A: Skeletal muscle is one of three major muscle types, the others being cardiac muscle and smooth…

Q: Describe the mechanical and biochemical properties of human skeletal muscle fiber types.

A: The Muscle is a soft tissue that is responsible for producing force and motion facilitated by the…

Q: Even though calcium is removed from troponin and tropomyosin, please describe in detail what else…

A: The events that result in the contraction of human muscle fiber starts with the signal by a…

Q: What are three functions of ATP in muscle contraction?

A: The muscle tissue present in the human body is primarily responsible for the movement in the body.…

Q: What is migrating myoelectrical complex (MMC)?

A: At fasten time, The contraction of muscle in stomach and in small intestine to clean the residual of…

Q: What are the three functional types of proteins found in a myofibril?

A: A muscle fiber is made of many Myofibril and myofibrils are made of many myofilaments. Myofibrils…

Q: Skeletal muscle cells cannot divide. How does skeletal muscle repair itself when injured?

A: It is a form of striated muscle tissue which is under the voluntary control of the somatic nervous…

Q: What is the importance of ATP in dissociating actin and myosin?

A: Animal physiology is the systematic study of the supporting features, roles, and processes of…

Q: If you add calcium to the bath around the earthworm smooth muscle, what would you expect will happen…

A: Introduction  Earthworms have smooth muscle in their body walls which helps them in movement and…

Q: Which of these is the proper sequence of these events of muscle contraction 1) Action potential…

A: Based on option, the correct order is 1, 3, 4 and 2. Steps in initiating contraction: Whenever…

Q: What is the function of myosin light-chain kinase in smooth muscle?

A: The muscular framework is an organ framework comprising of skeletal, smooth and heart muscles. It…

Q: What two types of microfilament make up the muscle sarcomere?  Which motor protein is primarily…

A: Filaments are long, thin and flexible structures that can be found in various biological systems.…

Q: What cellular changes could cause the skeletal muscle to become rigid?

A: Skeletal muscle cells do not relax or remain in a rigid state due to lack of ATP and so muscle…

Q: Suppose a person had an unusual mutation in the troponin protein of his skeletal muscles, such that…

A: The muscular system is a system of muscles where muscles are connected to bones and also to envelope…

Q: A) tetany is rapid spasm in the muscle. B) Tetany is usually caused by an increase in the blood…

A: Introduction: Tetany occurs in muscles that have no absolute refractory phase. The heart's muscles…

Q: Describe the function and source of calcium ions in initiating contraction in skeletal muscle?

A: We know that Our body contains different types of ions such as Sodium, Potassium, Calcium, Chloride,…

Q: Why are calcium ions so important for the muscle contraction process

A: Muscle contraction is a process carried out by the interaction of the actin and myosin proteins. It…

Q: Which of the following is the smallest: muscle fiber, thick filament, or myofibril? Which is…

A: Myofibrils are made up of small structures known as Myofilaments. There are basically two main kinds…

Q: Describe the role of calcium in regulating muscle contraction

A: Skeletal muscle is a type of striated muscle which is a voluntary muscle and the somatic nervous…

Q: How does the AP in the motor neuron cause calcium release in the muscle fiber?

A: Action potential refers to the depolarisation of neuronal membrane which is required for the…

Q: If you introduced a chemical into a muscle fiber that blocked the voltage-gated calcium channels in…

A: The muscles are the soft tissues found in the animals. They are made up of special types of…

Q: How does smooth muscle differ from skeletal muscle withrespect to its source of calcium and its…

A: The muscular tissue is composed of cells that have the responsibility of contraction and are called…

Q: What role does calcium have in muscle contraction?

A: The signal of muscle contraction initiates from the central nervous system. During the process of…

Q: what is a myofibril

A: To describe: To describe myofibril and its structure.

Q: Why is smooth muscle shortening much slower than in skeletal muscle?

A: Muscles are soft tissues found in the body, composed of actin and myosin proteins. These are…

Q: How does having unique characteristics help the skeletal muscle cells to function?

A: Skeletal muscle cells are also known as muscle fibers. It is composed of specialized cells that work…

Q: Impairment of intracellular calcium homeostasis in muscle fibers lead to chronic, severe muscle…

A: The sarcoplasmic reticulum(SR) regulates the amount of calcium in muscles. Following an increase in…

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: Describe the function and source of calcium ions in initiatingcontraction in skeletal muscle?

A: Introduction  Our body contains different types of ions such as Sodium, Potassium, Calcium, Chloride…

Q: What are Regulatory Molecules That Mediate ExerciseInduced Changes in Muscle?

A: Muscle is soft tissue and consists of protein filaments of myosin and actin. These filaments slide…

Q: Why is adenosine triphosphate (ATP) used for muscle contraction?

A: Muscle contraction is a process in which muscle shortening occurs due to the movement of the actin…

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.