Question 6 (1 point) The crossbridge cycle can begin when an action potential travels t-tubules sodium enters the muscle fiber calcium is released from the sarcoplasmic reticulum acetylcholine binds to ligand gates calcium is moved into the sarcoplasmic reticulum

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: QUESTION 14 What is the function of the presynaptic "autoreceptors" in axon terminals? a. To release…

A: Neuron is the main functional units of nervous system it contains axon, dendritic cells, cell body…

Q: Question 23) For these three situations below, describe whether there are changes in humoral,…

A: MC4 receptors reduce the food intake while elevating energy utilization . Action of this receptor…

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 3 During muscle contraction, the agonist while the antagonist 1. Shortens; lengthens 2.…

A: Muscles that produce movements work in groups during contraction. Therefore, classification of the…

Q: QUESTION 30 1. Fully aquatic mammals produce most of their force in swimming from axial muscles as…

A: Axial muscles are those muscles that support and move the head and spinal column and generates…

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: QUESTION 2 In an electrical synapse: Neurotransmitter release triggers the opening of ion channels…

A: A synapse is a connection between one neuron's axon terminal and the dendrite of the next neuron.…

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: It is important for newly developed neurons to form synapses with other neurons. which cells are…

A: Glial cells are of three types: astrocytes, oligodendrocytes and microglial cells.

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 30 Repolarization corresponds with sodium channels opened O both sodium and potassium…

A: Neurons are the basic structural and functional unit of nervous system and are conductile cells. A…

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 1 The diagram below represents a part of the human ear. Explain the result if part A is…

A: Ear is the primary organ involved in hearing. The major purpose of the ear is to keep our senses of…

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 21 Negative feedback O initiates compensatory, biological responses from sensory receptors…

A: Negative feedback is a self-regulatory system in which it reduces the output for stabilizing the…

Q: not a function of the autonomic nervous system

A: Autonomic nervous system( ANS): These are the functional division of the nervous system. Body…

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 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 4 This amino acid neurotransmitter causes IPSPS in target cells: GABA glutamate epinephrine…

A: Neurotransmitters are specific chemical molecules that are released from the presynaptic neuron in…

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 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: Immediately after an action potential has peaked, which of the following channels will open?

A: A neuron will accept feedback from other neurons and transmit the signal to downstream neurons if…

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 5 0.5 pts Which of the following are receptors used for neurons during reception? O…

A: 5.  Volatge gated ion channels

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: 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 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: Question 3 What part of the muscle fiber is a place of storage for calcium ions that is critical for…

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

Q: QUESTION 46 Nicotinic acetylcholine receptors are located on each of the following cells, except.…

A: The neurons that release acetylcholine neurotransmitter are called cholinergic neurons.

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 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.