32- For dead animals, we find their muscles are stiff because: a- A disorder of sliding actin b- Leakage of ATP molecules c- A disorder of binding myosin heads to actin filaments, so they are not bound. d- Overlapping between two actin filaments is not good enough.

Q: 30- Which of the following is true about muscle contraction: a- Results by the actin sliding along…

A: Muscle contraction us the tightening , shortening or lengthening of muscles when you do some…

Q: The picture below shows One nerve One muscle cell ten neurons ten muscle cells

A: Human beings are a complex species consisting of trillions of cells, each with its own form and…

Q: 35- which of the following is least likely to be a feature for brief- movement muscle: A.…

A: During muscle movement/contraction, CNS send signal through motor neurone which releases Ach at…

Q: The large muscle protein that essentially "anchors" the thin-filaments to the cell membrane and…

A: The myofibrils are built from three kinds of proteins : Contractile proteins : They generate force…

Q: 33. Which of the following sentences is NOT correct? A. Cancellous bone (trabecular) is spongy bone…

A: A bone forms a part of the vertebrate skeleton in animals. They protect the various organs of the…

Q: 29- Which of the following binds to Ca to trigger muscle contraction: A. Tropomyosin B. Troponin C.…

A: Skeletal muscles are usually attached to bones and tendons composed of connective tissue . Thin…

Q: Which of the following choices is CORRECT? A Myofibrils extend the length of a muscle fibre B.…

A: In muscles the sarcomer is termed as the fundamental unit. The sarcomer helps in the contraction.…

Q: 34. Which of the following proteins playsaimportant role in the geometry of sarcomere and in…

A: Titin is a filamentous protein traversing the half-sarcomere from the M-band to Z-band…

Q: The mechanical force of contraction (shortening) is generated by: O shortening of the thin filaments…

A: Muscle contraction starts when a signal is produced by the nervous system. The signal (action…

Q: 4. A transverse section across theT + a) I-band to one side of the Z-line would bisect only actin…

A: Since two questions are asked in this section. It can be possible to answer one question in the…

Q: 56- Which of the following is correct regarding decerebrate rigidity: a- Results from forebrain…

A: Introduction: The human body is a synchronized machinery of different physiological process. A total…

Q: 4. Muscle cells are full of the actin and myosin proteins. a. Briefly describe the arrangement of…

A: It has been inquired about the role of actin and myosin proteins in muscle contraction, the vitality…

Q: The type of muscle that contains neural varicosities delivering neurotransmitters to a large group…

A: The type of muscle that contains neural varicosities delivering neurotransmitters to a large group…

Q: 6 As calcium is actively reabsorbed into the sarcoplasmic reticulum, its concentration at the…

A: Excitation–contraction coupling: It is a physiological process which involves the conversion of an…

Q: 11 The picture below shows a sarcomere (from muscle):   Which letter best indicates the thick…

A: Skeletal muscle- Skeletal muscle forms about 40-50% of body mass and is responsible for movement and…

Q: 13 QUESTION 13 Which of the following is a characteristic of Slow-twitch (Oxidative) muscles? O A.…

A: The question is asking to identify the characteristic that is associated with slow-twitch…

Q: 42- One of the following sentences is incorrect: a- Stretching Golgi tendon leads to a relaxation to…

A: Skeletal muscles are one of the body's most important muscles for movement. Skeletal muscle fibers…

Q: 3- a muscle contracts more forcefully if: a- its motor units contracted simultaneously. b- the…

A: Muscle contraction is regulated through the the function of alpha motor neuron/lower motor neurone…

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: MULTIPLE ANSWER QUESTIONS. Select all that apply. Which of the following occurs when the muscle is…

A: The sarcomere is the basic unit of a muscle and is dependable for contraction. It is present in both…

Q: Choose the best description of how myosin and actin are arranged within the two types of protein…

A: In order to facilitate movement, muscles are attached to bones. They function by shortening…

Q: 49- A dog cannot stand on his legs, the knee jerk reflex is absent, the lesion located in: a-…

A: Vertebra can be defined as the cascade of small bones that are responsible for forming of vertebral…

Q: ***** ANTWO 777 • A hands: Dark areas that correspond to the areas where thick filaments are…

A: Sliding filament theory is a mechanism that helps the muscles to contract. Hence according to this…

Q: 12. Draw one labeled graph with two myograms: a single twitch contraction for a Type 1 fiber, and…

A: The skeletal muscle fibers can be differentiated primarily based on how speedy they can go through…

Q: You observe amphophilic staining of myofibroblasts, why do these cells have cytoplasmic amphophilic…

A: The term "amphophilic" denotes that the tissue stains with both basic and acidic dyes. A…

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: Making a Muscle Activity 1. Separate a twizzler by pulling apart the strands. Each strand will…

A: A muscle attaches to a bone through a tendon.  A muscle fiber is covered by a layer of connective…

Q: Give typed explanation  Put the events of a single cross-bridge cycle in the proper order. Start…

A: Cross-bridge cycle explains the calcium-based interaction of actin filament and myosin during…

Q: 39- The firing rate for primary sensory neuron of spindle muscle is: a- High during stretching the…

A: Muscle spindles are referred to as the stretch receptors present in the body within the skeletal…

Q: The type of muscle that is very rich in myoglobin and glycogen, making it very resistant to fatigue…

A: The type of muscle that is very rich in myoglobin and glycogen, making it very resistant to fatigue…

Q: Actin filaments have polarity. The plus end is the end to which subunits are added more rapidly, or…

A: Under the plasma membrane, actin filaments form a network that provides mechanical support, defines…

Q: Why is it necessary to have an action potential (electrical signal) in the muscle for contraction?…

A: An action potential is defined as a  sudden, rapid change in the membrane or voltage potential…

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.