Which of the following sentences is CORRECT? A. Intercalated disc is absent in smooth muscle and skeletal muscle B. The contraction of smooth muscle cells is slow. but they can remain contracted for long periods C. Cerebellar cortex is composed of outer molecular layer, central layer of Purkinje cells, and gramule layer D. Ganglia are ovoid structures containing neuronal cell bodies and glial cells supported by connective tissue E. All of the above

Q: During the contraction of a vertebrate skeletal muscle fiber,calcium ions(A) break cross-bridges as…

A: Skeletal muscles are voluntary muscles. It attached to bone by tendons. It helps in movement of…

Q: Troponin and tropomyosin are: a) regulatory proteins. b) contractile proteins. c) connective tissue…

A: There are different types of cells and tissues present in the body. All these tissues differ in…

Q: Identify the organelle most likely responsible for each cellular job within skeletal muscle  a)…

A: Skeletal muscles are those which are connected with the skeleton and are voluntary in nature. These…

Q: Ans Column I Column II Ca binds to calmodulin 1. Binds calcium in skeletal muscle cells Ca binds to…

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

Q: Which of the following statements best describes the sliding filament mechanism of muscle…

A: Actin- It is the main component of thin filament in muscle fibre, cytoskletal protein. Myosin-motor…

Q: Which of the following statements about the Ca2+ release channels in the sarcoplasmic reticulum is…

A: The right answer is option b) They are one-tenth the size of the voltage-gated Ca 2+channels. The…

Q: The type of muscle cell under voluntary control is the ________. a. smooth muscle b. skeletal muscle…

A: Tissue constitutes a group of cells, arranged in an orderly manner that communicates together, and…

Q: Single-unit smooth muscle cells can stimulate each other because they have:|- a. pacemakers. b.…

A: Smooth muscles are involuntary in nature and non-striated muscle cell which lines the inner side of…

Q: Satellite cells *         A- are muscle stem cells       B- are located between the plasma membrane…

A: Myosatellite cells, otherwise called satellite cells or muscle stem cells, are little multipotent…

Q: Tetanus is a disease caused by Clostridium tetani characterized by muscle spasms. Just like the…

A: Both Clostridium tetani and Clostridium botulinum are gram positive, anaerobic, non- motile and…

Q: Three kinds of muscle cells- cardiac, smooth and skeletal- differences between their anatomy?…

A: Muscular system There are three types of muscles in our body , they are  Skeletal muscle Smooth…

Q: In a muscle, muscle fibers are arranged in bundles that are wrapped in a thick layer of connective…

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

Q: a. Describe the relationship between stimulus voltage and the force of contraction b. What was the…

A: The threshold stimulus voltage is found by varying the stimulus voltage slightly to discover the…

Q: Single-unit smooth muscle cells can stimulate each other because they havea. a latch-bridge.b.…

A: The myocyte is also known as a muscle cell or the type of cell found in some types of muscle tissue.…

Q: 4) How are the muscle spindles stretched during the patellar reflex? a) Striking the tendon with a…

A: The muscular system in the body is made up of muscle fibres which help in muscle contraction. they…

Q: Gather information on the structure and function of skeletal, cardiac and smooth muscle. Combine all…

A: Actin can exist in two forms—one, G-actin, is globular; the other, F-actin, is fibrous.

Q: Ans Column I Column II Ca binds to calmodulin 1. Elastic fibers that anchor thick filanments in…

A: Muscle is a soft tissue found in animals which consists of actin and myosin that slides over each…

Q: Muscular atrophy occurs when: A. A patient lacks the coordination needed to walk normally. B. Muscle…

A: Muscular atrophy refers to the loss of skeletal muscle. The atrophied muscle normally smaller and…

Q: Column I Column II   Ca binds to calmodulin 1.           Elastic fibers that anchor thick…

A: COLUMN-I COLUMN-II 1 Z line  Elastic fibers that anchor thick filaments in place 2 actin and…

Q: In the stretch reflex,a. Golgi tendon organs activate contraction in extrafusal muscle…

A: A stretch reflex occurs when muscles are stretched, and the receptors send action potentials up the…

Q: A skeletal muscle motor unit   A.Is the number of muscle cells innervated by one motor neuron. B.Is…

A: The skeletal system consists of bones and muscle fibres. These muscle fibres help in contracting and…

Q: Ans Column I Column II Ca binds to calmodulin Binds calcium in skeletal muscle cells 1. Ca binds to…

A: Muscle is a soft tissue found in animals which consists of actin and myosin that slides over each…

Q: In 2013, Zach Bitter set a new record for running a 100 mile Ultra-Marathon in less than 12 hours.…

A: The muscle fiber is an individual muscle cell that consists of hundreds or thousands of myofibrils.…

Q: The Ca2+ required for skeletal muscle contraction, O A. Is released from mitochondria B. Is released…

A: when the nerve impulse is activated that is action potential comes in  muscle contraction…

Q: In muscle cells, magnesium ions compete with calcium ions for binding sites on troponin molecules.…

A: Calcium triggers contraction by reaction with regulatory proteins that in the absence of calcium…

Q: Which of the following is false regarding smooth muscle? A. It contracts slower than skeletal…

A: There are three types of muscles skeletal, cardiac and smooth muscles.

Q: In an examination of a sample of muscle tissue, you notice that thesample consists of striated cells…

A: Step 1 Muscle tissue is a tissue of mostly mesodermal origin where the cells, called myocytes, are…

Q: structural organization of muscle fibers makes it possible to produce contractile force

A: Answer: Sarcomere of Muscles fibre or myofibre is the basic contractile unit of skeletal muscle.

Q: Which of the following best describes the response of the circular muscle layer to distention of the…

A: E) Relaxation above and contraction below the point of distention

Q: Smooth muscle

A: Smooth muscle:-  Is a type of tissue found in the wall of hollow organs such as the intestine,uterus…

Q: In relation to the size principle of motor unit recruitment, the mechanism of recruitment f) order…

A: The process of activating different motor units to achieve a specific level and kind of muscular…

Q: What is the fundamental contractile unit of skeletal muscle? b. What are the names of the bands,…

A: Muscle contraction occurs when sarcomeres shorten, as thick and thin filaments slide past each…

Q: What is represented on the image above? (A) A cross-section of a cardiac muscle B A longitudinal…

A: Introduction Muscles are soft tissues, Many, stretchy fibers make up our muscles, muscle is a group…

Q: What event causes a troponin-tropomyosin complex to regain its original shape in muscle relaxation?…

A: Muscle contraction is the action of activation and generation of tension sites with muscle fibers…

Q: Acetylcholinesterase is an important molecule in the engine end plate to share: a) stimulates…

A: Introduction:  Acetylcholinesterase is primary cholinesterase in body. It is also known as AChE or…

Q: Skeletal, smooth, and cardiac muscle are similar in that they all _____.   A are divided into motor…

A: SKELETAL MUSCLES SMOOTH MUSCLES CARDIAC MUSCLES They are striated muscles. They are non-striated…

Q: Please answer both questions.  At some point, increasing stimulus strength will not result in a…

A: In most animals, muscle is a soft tissue that is found. Muscle cells produce actin and myosin…

Q: Striations are found in the cytoplasm of which type(s) of muscle tissue? Select all that apply.…

A: Muscle tissue- This tissue is a crucial part of any movement that the body comprises via…

Q: Heart muscle cells ______.   A will not contract unless acetylcholine is released at a…

A: Cardiac muscles are known as Myocardium.Cardiac muscles are different from skeletal muscle because…

Q: patient spends 6 weeks on bedrest. What happens to the muscles, tendons, and bones in her legs…

A: Skeletal muscles help people move their limbs. Muscles are attached to the bones with the help of…

Q: The walls of blood vessels in the brain are formed by cells that are very tightly packed. This…

A: C- The walls of the vessels in the brain are tightly packed or has a tightly junction which allow…

Q: 1. A receptor absorbs the energy of a stimulh by means of a. Reception b. Transmission c.…

A: Physiology is defined as the study of the way the human body works. It tells the basic and complex…

Q: When a muscle fiber is stretched from 60% of its optimal length to Lo, what change or changes are…

A: INTRODUCTION When a muscle is stretched, some of its fibers lengthen, but other fibers may remain at…

Q: Which of the following statements about skeletal muscle is CORRECT? Select one: a. An increase in…

A: Muscle tissue is made up of cells that contract (become shorter) when stimulated by the nervous…

Q: What do the two main proprioceptors in muscles respond to? Select one: a. The golgi tendon organ…

A: proprioreceptor: A sensory receptor that responds to position and movement of the body in…

Q: Which statement about striated skeletal muscle is true?   A. The tension generated by a muscle is…

A: Muscle  contains muscle fiber cells which are specialized for contraction. Based on location,…

Q: A K FL

A: Nervous system coordinates and controls the activities of the animals such as perceptions, behaviors…

Q: When Skeletal muscle contracts an arrangement of the alternating light and dark bands traversing…

A: During muscle contraction calcium is released from the sarcoplasmic reticulam which binds with the…

Q: 1. Henry was extremely scared from an exposure to a scary haunted experience. Thus, the constant…

A: The skin is the largest organ of the body, which performs the functions of protection,…

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.