QUESTION 10 The crossbridge cycle is initiated by the rise in released from the sarcoplasmic reticulum. calcium ion sodium ion acetylcholine dihydropyridine

Q: 14. View the images below and circle the image which shows the sarc tension – and WHY Explanation:

A: Each muscle fibre is composed of units called myofibrils that are consists of alternating dark(A)…

Q: What is the molecular explanation for the observation that the I band appears to shorten in a muscle…

A: The basic contractile unit of muscle fibre is the sarcomere. Each sarcomere is made up of two…

Q: QUESTION 8 How does the nervous system grade the force of muscle contraction? O a. Only by…

A: Nervous system is made up of highly specialised cells called neurons. The function of neuron is to…

Q: QUESTION 14 Striated muscles are so-called because of a repeating pattern of light and dark bands.…

A: There are different types of muscles, the three main types of muscle are Skeletal muscle, Smooth…

Q: motor protein(s) that can carry vesicles along microtubules?

A: Motor proteins -The last element required for the vesicle transport system is the motor protein.…

Q: QUESTION 5 What is retrograde axoplasmic transport? Oa. Movement of material from axon terminal to…

A: The scientific theory of the nerve system is known as neuroscience. Physiological, morphology,…

Q: QUESTION 28 Sort the following events to reflect the sequence during smooth muscle contraction upon…

A: Since the given image contains multiple types of questions, the first question in chronological…

Q: QUESTION 4 In the resting state: voltage-gated Na+ and K+ channels are both closed voltage gated Na+…

A: Voltage-gated ion channels:  a type of transmembrane proteins that results in formation of ion…

Q: Question 47 (1 point) Which of the following options describes the speed at which force may be…

A: Type 1 muscles fibers are present for long duration of contractile activities.and found in the…

Q: Sarcomeres are functional units _____muscle A) Cardiac B) Skeletal C) B and C only D) Smooth

A: To say that the sarcomere is the practical unit implies that every one of the segments required for…

Q: Question 6 (1 point) The crossbridge cycle can begin when an action potential travels t-tubules…

A: During the muscle movements, the thick filaments slide over the thin filaments and results in the…

Q: Question 6 Depletion of ATP. The EMG remains high even as the tension declines. O Accommodation…

A: Muscle fatigue is the decline in ability of muscles to generate force. It can be a result of…

Q: QUESTION 1 Mary was accidentally poisoned with unknown substances during jungle trekking. The poison…

A: In the case of Mary the poison that blocks the voltage gated calcium channels and the release of the…

Q: QUESTION 27 The neurotransmitter-plays a role in the abuse of some substances, particularly…

A: Neurotransmitter  A chemical compound that is released in the synapse to carry message from one…

Q: QUESTION 4 If you open an Na+ channel in a typical neuron: Na+ will enter the cell, and the cell…

A: Role of sodium channels in typical neurons.

Q: QUESTION 13 Which of the following are not criteria for a substance to be detined as a…

A: Note: We’ll answer the first question since the exact one wasn’t specified. Please submit a new…

Q: Question 31 What is true about transient receptor potential (TRPV1) channels? They are highly…

A: Transient receptor potential vanilloid 1 (TRPV1) channel is speculated to have six transmembrane…

Q: QUESTION 9 All of the following are related to the Basal Lamina EXCEPT: O Integrin Proteins Laminin…

A: Basal Lamina is that layer that is released by the epithelial cells atop which the epithelium…

Q: Question No 1. When the nerve cell is in a resting state itsmembrane is 59:43 Oa. Polarized Ob.…

A: Neuronal excitability is mainly regulated by an A-type voltage-gated potassium channel which is a…

Q: QUESTION 9 Action potential is characterized by O a. Membrane repolarization created by Na channels…

A: The ion channels that let the positive ions to flow out or negative ions to flow inside through the…

Q: QUESTION 6 If you performed the experiment outlined in question 6 with full-leng would you observe…

A: This graph is represented (question 5) between the relative fluorescence units (y-axis) and Time…

Q: QUESTION 6 If you activate all the profilin in a cell, what will happen to treadmilling actin…

A: Option A is correct as treadmilling occurs in several cellular cytoskeletal filaments. It is mostly…

Q: Question 7 Place the events involved in generating an action potential in the order in which they…

A: Neurons are ths structural and functional unit of the nervous system. They help to transmit…

Q: Question 5 of 18 When a threshold or a minimum magnitude of voltage fluctuation is reached, Select…

A: The neurons are responsible for generation and transmission of nerve impulses. They contain specific…

Q: QUESTION 15 What section of a sarcomere does not shorten during muscle contraction? Al Al Z disk…

A: INTRODUCTION Sarcomere It is a part of a striated muscle, which is a functional unit and works in…

Q: Question 10 What part of the brain acts as a relay station for incoming sensory information?…

A: The forebrain includes mainly two cerebral hemispheres of the brain (cortex) and a number of…

Q: QUESTION 22 Select the factor that binds to the side of the actin filaments to stabilize it.…

A: Actin is a family of globular multi functional proteins that form microfilaments.

Q: Question 1 In a NMJ, what happens to the sarcolemma when acetylcholine is released into the synpatic…

A: A neuromuscular junction or a myoneural junction is a synapse between the terminal end of a motor…

Q: Question 2: Action potentials 1. Aneuron is isolated and placed in a bath of normal ECF solution.…

A: Introduction An action potential is a characteristic pattern of sudden rise and subsequent decline…

Q: QUESTION 2 The transverse tubules store and release calcium ions (Ca2+) in response to an action…

A: A muscle is composed of a group of muscle fibers, and the plasma membrane of the muscle fiber is…

Q: During the absolute refractory period for a neuron, most voltage-gated Na+-channels are in which…

A: Introduction Action potential is a short-lasting event in which the electrical membrane potential of…

Q: What do synaptic vesicles of a neuromuscular junction contain?   a serotonin   b sodium   c…

A: A neuromuscular junction is a chemical synapse between a motor neuron and a muscle fiber. It allows…

Q: QUESTION 30 Which of the following is characteristic of the events at the inhibitory synapse? O…

A: The term inhibitory synapse is associated with particular sort of junction in which activation from…

Q: Question 4 Sodium channels at the trigger zone initiate action potentials by a feedback negative…

A: INTRODUCTION The voltage gated sodium channels present throughout the body. It conduct sodium ions…

Q: Nerve impulses leading to the skeletal muscle carry information to direct movements. The nerve…

A: The nervous system is responsible for coordinating the behaviour and transmitting signals throughout…

Q: Question 41 The sliding filament model of contraction involves----- A) Actin and myosin sliding…

A: Sarcomeres are a set of simple units organized in a stacked pattern in muscle tissue. Many parallel…

Q: QUESTION 24 Which statement is correct? A В C: E D The structure labeled C is called the A band The…

A: Muscles are the main system of the body that help in movements. Sarcomere is the basic unit of…

Q: QUESTION 4 A bigger stimulus will generate: a bigger action potential graded potentials rather than…

A: Nerve impulse refers to an electrical or chemical signal that is transmitted along a nerve fibre.…

Q: QUESTION 29 In myogenesis, the assembling sarcomeres are integrated with the extracellular matrix…

A: 29. The sarcomere and extracellular matrix interaction: 1. Integrin is a protein that mediates the…

Q: Question 45 Which cells would become active if you had hypocalcemia? osteoclasts osteoblasts…

A: Hypocalcaemia is a condition in which the blood has too little calcium. Hypocalcaemia can be caused…

Q: QUESTION 41 As ATP binds to the myosin head at the beginning of a muscle contraction cycle, the…

A: The actin and myosin are the filaments responsible for the movement of cells.

Q: acetylcholine is acting in an excitatory manner which of the following is likely a result of the…

A: Neurotransmitter is a chemical which released from ends of nurone and act as a stimulant of adjacent…

Q: QUESTION 39 In a contractile unit of muscle, "thin" filaments are composed of O A. calcium. О В.…

A: 39. The muscular system is one of the major organ systems in the body composed of skeletal, smooth,…

Q: Question 11 In a resting muscle, the active site on G-actin is blocked by which part of the muscle…

A: Actin filaments or F actin are linear polymers of globular actin(G-actin) subunits. Tropomyosin is a…

Q: QUESTION 7 The somas of pseudounipolar neurons carrying information in the spinal nerves are located…

A: Introduction : Neurons are the nervous tissue's cellular units. The nervous system is divided into…

Q: QUESTION 5 Novocaine works by binding to and blocking Na+ channels. If there was another drug that…

A: Action potential of neurons.

Q: Question 10. Why does the sarcomere length appear to shorten (from Z line to Z line) when a muscle…

A: The striations on muscles are formed due to a pile of sarcomeres. It encompasses the basic structure…

Q: The sliding filament model of contraction involves

A: The sliding filament model: The mechanism of muscle contraction is explained by sliding filament…

Q: How is smooth muscle contraction regulated differently from striated skeletal muscle contraction?

A: Option A is incorrect  Explanation: Smooth muscle have thick and thin filaments which do not arrange…

Q: QUESTION 16 If the concentration of calcium ion (Ca2*) in the cytosol of a skeletal muscle cell is…

A: The contraction of skeletal muscles is explained by the sliding filament mechanism.

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.