Thin and thick filaments are organized into functionalunits called ________.a. myofibrilsb. myofilamentsc. T-tubulesd. sarcomeres

Q: Muscle relaxation occurs when ________. a. calcium ions are actively transported out of the…

A: The human body is a well built machine in which all the organs coordinate together to make it work.…

Q: muscle cells are made up of? A. Z bars b. actin c. myosin d. myofibrils

A: Muscles are soft tissues found in most of the animals. Functions of muscles are to produce motion…

Q: Most skeletal muscles contain which of the following? O fast twitch fibers O slow twitch fibers O…

A: * Skeletal muscle functions in voluntary actions hence called as voluntary muscle. *Skeletal muscles…

Q: Bank: A. Contraction C. Relaxation B. Myosin filament D. Actin filament C. Endocrine E. Contact…

A: A group of cells that have similar structure and that function together as a unit are known as 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: Actin filaments in microvilli require the help of myosin so that they can associate with the…

A:

Q: Which item is biggest? A. myosin head B. myofibril C. troponin D. sarcomere

A: Muscles are compact structures made up of highly tensile , strong, long, multinucleated cells called…

Q: An important protein in contractile muscle. OA. keratin O B. myosin O c. elastin OD. fibrin

A: The proteins have a variety of functions in the body. The functions of the proteins in the body are…

Q: Motor neurons innervate muscle fibers at specialized synapses called_______ . The release of…

A: In “motor neurons”, the cell bodies are located in the spinal cord, motor cortex, or brainstem. The…

Q: In the numbered list below, what are they in order from largest to smallest? 1. Myofilaments 2.…

A: Tissue is the next level organization of the cells. There are 4 different types of tissue are…

Q: Stimulation of a muscle fiber by a motor neuron occurs ata. the neuromuscular junction.b. the…

A: Anatomy and physiology are the branches of biology, anatomy deals with the study of the structure of…

Q: In a myofibril, the light central region of an A band is called... O I band O M line O Z band O H…

A: In a myofibril, the light central region of an A band is called H zone.

Q: Which of the following statements is True?a. Tendons contract using the sliding filament…

A: The muscular-skeletal system made up of tendons, ligaments, bones, muscles of various types. The…

Q: During muscle isometric tension, the maximum tension occurs when: O a. There is no overlapping…

A: Isometric contraction occurs when muscle length remains relatively constant as tension is produced.…

Q: Nervous stimulation of musclesa. occurs at a neuromuscular junction.b. results in an action…

A: Answer is d.)  All of these Correct.

Q: The______ is the basic unit of contraction. a. osteoblast c. myofibril b. sarcomere d. myosin…

A: Contraction is the property of muscles that helps in the movement of bones for locomotion. The…

Q: The region where a motor nerve fiber meets a skeletal muscle fiber is called a/an _____.

A: Muscles are the connective tissue that helps in producing movement in the body. There are three…

Q: A sarcomere shortens when______ . a. thick filaments shorten b. thin filaments shorten c. both thick…

A: Skeletal muscles are a special type of muscles made up of contractile tissue. They are a type of…

Q: For relaxation to occur, A. calcium leaves the sarcoplasmic reticulum, and troponin binds calcium…

A: The muscle contraction and relaxation are regulated by the concentration of calcium ions released…

Q: Which of the following changes takes place when a skeletal muscle contracts?A. Z discs move farther…

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

Q: A muscle fiber is the same thing as a: a) myofibril. b) myocyte. c) myofilament. d) fascicle.

A: MUSCULAR TISSUE:- These tissues are different from other tissues as they have the ability to…

Q: In a skeletal muscle fiber, Ca2+ is released from a. ACh receptors. b. the motor end plate. c. the…

A: Skeletal muscle mainly attaches to the skeletal system via tendons to maintain posture and control…

Q: In relaxed muscle, the myosin-binding site on actin is blocked by ________. a. titin b. troponin c.…

A: Tropomyosin is known to block myosin-binding sites on actin molecules. It prevents the formation of…

Q: In a contractile unit of muscle, "thin" filaments are composed of А. O A. calcium. O B. actin. OC.…

A: Muscle contraction leads to shorting the length of muscle. Muscle contraction implies that movement…

Q: Myosin's affinity for actin occurs Following the power stroke When myosin is energized When a new…

A: Myosin is a fibrous globulin of muscle. It split ATP and react with actin in muscle contraction.…

Q: According to the sliding filament theory: a. The tension increases linearly as actin-myosin overlap…

A: Introduction : The sliding filament theory states that the myosin filaments which are thick…

Q: The contractile unit of a muscle fiber is called: O myosin O actin sarcomere O sarcolemma

A: Introduction :- Muscle fibres are made up of just one muscle cell. They aid in the control of the…

Q: The repetitive contraction unit in muscle cells is called: Select one: O a. A Band O b. Fibril O c.…

A: There are types of muscle fibers: Skeletal muscle fibers, Smooth muscle fibers and cardiac muscle…

Q: Place these structures in order from LARGEST structure to SMALLEST: A) Myofibril  B) Myofilament…

A: Each skeletal muscle is an organ that consists of various integrated tissues. These tissues include…

Q: - The sacromere is: a- A functional unit of the skeletal muscle b- The area between two intercalated…

A: Muscle cells, commonly known as myocytes, are the cells that makeup muscle tissue. There are three…

Q: In smooth muscle fibers, the thin filaments attach to structures called functionally similar to Z…

A: Muscular tissue is made up of long cells of muscle fibers. It has contractile proteins that are…

Q: When a muscle fiber is stimulated with repeated stimuli, the contraction force is summed due to: a)…

A: INTRODUCTION Summation is that the . occurrence of additional twitch contractions before the…

Q: Letter C is labeling А Tendon

A: Muscle are basically a soft tissue which have property of undergo contractions with action potential…

Q: Myosin myofilaments area. attached to the Z disk.b. found primarily in the I band.c. thinner than…

A: The actin-myosin interaction is most commonly known for its role in sliding filament theory, where…

Q: State some major differences between actin filaments and myosin filaments.

A: A long chain of protein like those in muscle and hair is called protein filaments. They are…

Q: The cell membrane of a muscle fiber is called________.a. myofibrilb. sarcolemmac. sarcoplasmd.…

A: Muscle is a soft tissue which is found in most animals. They are helpful in providing movement and…

Q: The cells of muscles, myocytes, develop from________.a. myoblastsb. endodermc. fibrocytesd.…

A: Cells are the basic structural and functional unit of an organism. The level of organisation of the…

Q: .. The difference between FF (type II, glycolytic) motor unit and S (type I) motor unit is that a S…

A: Introduction:- When identifying muscle fibres, two factors to consider are how fast some fibres…

Q: Arrange the steps in the correct order to explain how a muscle fiber contracts.   Myosin and actin…

A: The movement of muscles in the body in response to a stimulus is so quick that it is difficult to…

Q: What structure invaginates into the middle of the muscle cell to transport Ca2+ into the middle of…

A: Muscle contraction is a process in which the actin and myosin filaments slide past each other.…

Q: A sarcomere contracts when a) Thin filaments (actin) slide b) Thick filaments (myosin) slide c) Thin…

A: Muscles form an important system in our body and functions in locomotion and body movement. They…

Q: ansverse (T) tubules are parts of. . O A. all answers are correct O B. Sarcoplasmic reticulum OC.…

A: The protracting parts of the cell membrane are known as transverse tubules. Both skeletal and…

Q: is the collective term for actin and myosin. sarcomere O myofibrils O muscle hiber O skeletal muscle

A: The basic contractile unit of muscle fibre is the sarcomere. Actin and myosin are the active…

Q: Can you match the sacromere anatomy with the proper answer from the list below the table graph?…

A: A typical myofibril have striated appearance due to he presence of light bands  and dark bands. The…

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.