What is the most outer covering (made up of areolar connective tissue sheath) of a muscle fiber called?     endomysium     perimysium     epimysium     sarcolemma What do synaptic vesicles of a neuromuscular junction contain?     sodium     serotonin     calcium     acetylcholine

Q: What prevents cross-bridges from attaching to sites on the thinfilaments in a resting skeletal…

A: Muscles are the tissues able to contract in response to stimuli.

Q: Define what T tubules when they're part of muscle fiber? What is their role in muscle fiber?

A: Myofibers are another name for muscle fibers. The skeletal muscle tissue is made up of these…

Q: Name three differences between slow-twitch and fast-twitch muscle fibers.

A: A sudden and quick movement of muscles or rather, contraction of muscles is referred to as Twitch.…

Q: What special terms are given to the plasma membrane, cytoplasm, and smooth ER of a muscle cell?

A: The skeletal muscles have a striated appearance, and these muscle tissues are under the voluntary…

Q: Why is it logical that there are no muscle fibers classified asslow-glycolytic?

A: There are 3 types of muscle Fibres. Type I= slow oxidative Type II=fast oxidative Type III=fast…

Q: As skeletal muscle contracts, one or more bands of the sarcomere become narrower and disappear, and…

A: When the myosin binds to the actin filaments, it forms the cross-bridge that causes a shortening of…

Q: Which is the order of glycolytic capacity between these muscle fiber types O I> lla > Ilx O Ix > la…

A: The contraction of the muscle fibre is explained by the muscle contraction theory by the 2 muscle…

Q: A nerve fiber,together with all of the muscle fibers it innervates, is called amotor unit. A motor…

A: The plasma membrane of a neuron can change its potential from a resting potential to an action…

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: What ion and ion channels does a muscle cell have?

A: A specialized tissue that originates from the mesodermal layer and helps in the locomotion of an…

Q: Which protein is responsible for blocking the myosin binding site to actin, while the muscle is at…

A: Myosin and actin slides onto each and plays a major role in muscle contraction..

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: Describe what is meant by muscle fiber "cross-bridges". What occurs to enable movement of the…

A: Muscular system is a body system which is involved in regular contraction and relaxation resulting…

Q: Muscle fiber: a muscle cell; Myofibril  Thick filaments  Thin filaments  Sarcoplasmic reticulum…

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

Q: Each sarcomere contains two sets of thin filaments. What are they? What is their function?

A: The soft tissue-like structure found in the majority of the animals including human beings is known…

Q: Explain why skeletal muscle fibers appear striated.

A: The muscular system comprises three major types of muscle cells - smooth muscle, cardiac muscle, and…

Q: What is the role of ATP and ATP hydrolysis in the cycle of actin-myosin association and…

A: ATP (adenosine triphosphate) and ATP hydrolysis play crucial roles in the cycle of actin-myosin…

Q: What band in skeletal muscle gets narrower during a contraction?

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

Q: What conditions will produce the maximum tension in a skeletal muscle fiber?

A: Muscles are required in breathing, talking, running, walking, and any body movements. Actin and…

Q: Type II (fast twitch) muscle fibers contain what properties?    Select 2 correct answer(s)…

A: Skeletal system are the major organ system of the human body that provides framework and structural…

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: the process of muscle contraction, which of the following steps immediately precedes the influx of…

A: Muscle contraction:-  Is the response  a muscle has to any kind of stimuli where the result is…

Q: Describe the structural features of a neuromuscular junction andthe role of acetylcholine in…

A: Introduction  Complex organisms such as Multicellular organisms needs control and coordination…

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: 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: In cardiac muscle, which ion serves both to depolarize the cells and as the essential link to…

A: correct amswer = b-Ca+ The shape of voltage-gated calcium channels changes as a muscle cell is…

Q: Describe the structural features of smooth musclecells and contrast them with skeletal musclefibers.

A: The muscular tissue is made up of cells that are specialized for contraction and are called muscle…

Q: If a single twitch of a skeletal muscle fiber lasts 40 msec, what action potential stimulation…

A: In human physiology, skeletal muscle is defined as the vital organ of muscular system which is also…

Q: What is special about a muscle cell does it possess any unique qualities or organelles?

A: Muscles are derived from the mesodermal layer of germ cells through myogenesis. Three types of…

Q: Discuss two physiological categories of muscle fibers and their respective advantages?

A: Muscles can be defined as the type of soft tissues which consist of the actin and myosin filament.…

Q: Describe a typical smooth muscle cell. How do itsstructure and its contraction process differ from…

A: Muscle is a contractile tissue found in animals whose function  is to create movement. Movement, the…

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: Muscle fibers contain which of the following?

A: Muscles are protein filaments that allows the body to move, speak and chew. They contain…