what part of the sarcolemma contains acetylcholine receptors?
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What part of the sarcolemma contains acetylcholine receptors? A. any part of the sarcolemma B. part adjacent to another muscle cell C. motor end plate D. end of the muscle fiber
Answer to: What part of the sarcolemma contains acetylcholine receptors? A. any part of the sarcolemma B. part adjacent to another muscle cell C....
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What part of the sarcolemma contains acetylcholine receptors? A. any part of the sarcolemma B....
What part of the sarcolemma contains acetylcholine receptors? A. any part of the sarcolemma B.... Question:
What part of the sarcolemma contains acetylcholine receptors? A. any part of the sarcolemma B. part adjacent to another muscle cell C. motor end plate D. end of the muscle fiber
The Neuromuscular Junction:
The neuromuscular junction is a highly specialized synapse between the terminal end of a motor neuron and a muscle fiber. This synapse plays a vital role in the function of skeletal muscle, as it is responsible for transmitting the signal between the nervous system and muscle, resulting in muscle fiber action. At the neuromuscular junction, the motor neuron transmits this signal by releasing acetylcholine.
A number of steps must occur in order for successful muscle contraction:
The action potential reaches the terminal end of a motor neuron.
Voltage-gated calcium channels open, allowing calcium to rush into the axon terminal.
Neurotransmitter vesicles fuse to the presynaptic membrane, and acetylcholine is released into the synaptic cleft.
Acetylcholine binds to receptors on the sarcolemma.
Sodium, potassium, and other cations begin to flow across the cell membrane, generating an action potential within the muscle fiber.
The muscle contracts.
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The Neuromuscular Junction: Function, Structure & Physiology
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Chapter 14 / Lesson 5
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Learn about the mechanism of muscle contraction that occurs at the neuromuscular junction. Explore the neuromuscular junction and its function, structure, and physiology.
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What part of the Sarcolemma contains acetylcholine receptors?
what part of the sarcolemma contains acetylcholine receptors? The part of the sarcolemma that contains acetylcholine receptors is the motor end plate. *Acetylcholine released at the neuromuscular junction triggers a muscle action potential, which leads to muscle contraction.
Asked by: Amberly Klingseisen
asked in category: General Last Updated: 1st March, 2020
What part of the Sarcolemma contains acetylcholine receptors?
what part of the sarcolemma contains acetylcholine receptors? The part of the sarcolemma that contains acetylcholine receptors is the motor end plate. *Acetylcholine released at the neuromuscular junction triggers a muscle action potential, which leads to muscle contraction.Click to see full answer.
Furthermore, what is the part of the Sarcolemma?
Sarcolemma is the cell membrane that encloses each muscle cell (which is also known as a muscle fibre). Endomysium is connective tissue that wraps each individual muscle fibre. Perimysium is connective tissue that wraps bundles of muscle fibres - the "bundles" being known as fasicles.
Also, what is the role of tropomyosin in skeletal muscles? Tropomyosin is a protein involved in skeletal muscle contraction and that wraps around actin and prevents myosin from grabbing it. The calcium activates the troponin complex, which moves tropomyosin, and the muscle cell can contract.
Also to know, what specific type of ACh receptors are found at the muscle motor end plate?
In vertebrates, motor neurons release acetylcholine (ACh), a small molecule neurotransmitter, which diffuses across the synaptic cleft and binds to nicotinic acetylcholine receptors (nAChRs) on the cell membrane of the muscle fiber, also known as the sarcolemma.
What event directly triggers the release of neurotransmitter shown in A?
>exocytosis. Neurotransmitters stored in synaptic vesicles are released into the synaptic cleft by exocytosis.
39 Related Question Answers Found
What is called Sarcolemma?
The sarcolemma (sarco (from sarx) from Greek; flesh, and lemma from Greek; sheath) also called the myolemma, is the cell membrane of a striated muscle fiber cell.
Where is the Sarcolemma located?
The sarcolemma is the plasma membrane of the muscle cell and is surrounded by basement membrane and endomysial connective tissue.
What is a sarcoplasmic reticulum?
Sarcoplasmic reticulum, intracellular system of closed saclike membranes involved in the storage of intracellular calcium in striated (skeletal) muscle cells.
What is the difference between Sarcolemma and Sarcoplasm?
The sarcolemma is a sheath enveloping myofibrils. The myofibrils, muscle fibres, are made up of sarcomeres, a group of myocytes (muscle cells) lined up in a strand giving muscles the striped look. Sarcoplasm is the specific type of cell plasma surrounding the sarcomeres that are contained within the sarcolemma.
What is the function of Myofibrils?
Myofibril Function Myofibrils are made up of sarcomeres, the functional units of a muscle. The function of the myofibril is to perform muscle contraction via the sliding-filament model.
What is the function of sarcoplasmic reticulum?
The sarcoplasmic reticulum (SR) is a membrane-bound structure found within muscle cells that is similar to the endoplasmic reticulum in other cells. The main function of the SR is to store calcium ions (Ca2+).
What is the function of Endomysium?
The endomysium, meaning within the muscle, is a wispy layer of areolar connective tissue that ensheaths each individual myocyte (muscle fiber, or muscle cell). It also contains capillaries and nerves. It overlies the muscle fiber's cell membrane: the sarcolemma.
What is the function of Sarcoplasm?
Sarcoplasm is the cytoplasm of a muscle fibre. It is a water solution containing ATP and phosphagens, as well as the enzymes and intermediate and product molecules involved in many metabolic reactions.
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What is the function of ACh receptors?
Nicotinic acetylcholine receptors are ligand-gated ion channels permeable to sodium, potassium, and calcium ions. In other words, they are ion channels embedded in cell membranes, capable of switching from a closed to an open state when acetylcholine binds to them; in the open state they allow ions to pass through.
What happens when acetylcholine receptors are blocked?
Cobras and Curare The acetylcholine receptor is an essential link between the brain and the muscles, so it is a sensitive location for attack. Many organisms make poisons that block the acetylcholine receptor, causing paralysis.
What do nicotinic receptors do?
The nicotinic acetylcholine receptor (nAChR), a key player in neuronal communication, converts neurotransmitter binding into membrane electrical depolarization. This protein combines binding sites for the neurotransmitter acetylcholine (ACh) and a cationic transmembrane ion channel.
Where are ACh receptors?
The nAChR is found at the edges of junctional folds at the neuromuscular junction on the postsynaptic side; it is activated by acetylcholine release across the synapse.
What happens when Acetylcholine stimulates its receptors?
What happens when acetylcholine stimulates its receptors in the neuromuscular junction? The release of Ca2+ from the sarcoplasmic reticulum decreases. The permeability of the sarcolemma to Na+ increases. The permeability of the sarcolemma to Na+ increases.
Chapter 10 Muscular Tissue Flashcards
Start studying Chapter 10 Muscular Tissue. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Chapter 10 Muscular Tissue
5.0 1 Review Epimysium
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Outer layer, encircling the entire muscle. It consists of dense irregular connective tissue.
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Perimysium
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also a layer of dense irregular connective tissue, but surrounds groups of 10 to 100 or more muscle fibers, separating them into bundles called fascicles. If you tear a piece of meat, it rips apart along the fascicles.
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1/98 Created by danny_rojas4
Terms in this set (98)
Epimysium
Outer layer, encircling the entire muscle. It consists of dense irregular connective tissue.
Perimysium
also a layer of dense irregular connective tissue, but surrounds groups of 10 to 100 or more muscle fibers, separating them into bundles called fascicles. If you tear a piece of meat, it rips apart along the fascicles.
Endomysium
penetrates the interior of each fascicle and separates individual muscle fibers from one another. The endomysium is mostly reticular fibers.
autorhythmicity
This built in rhythm of the heart is termed autorhythmicity
sphincters
storage is accomplished by sustained contractions of ringlike bands of smooth muscle called sphincters, which prevent outflow of the contents of a hollow organ.
thermogenesis
as a muscular tissue contracts it produces heat,
action potential (impulses)
Electrical excitability is a property of both muscle and nerve cells, is the ability to respond to certain stimuli by producing electrical signals called action potential (impulses)
fascia
dense sheet or broad band of irregular connective tissue that lines the body wall and limbs and supports and surrounds muscles and other organs of the body.
tendon
attaches muscle to the periosteum of a bone
aponeurosis
when the connective tissue elements extend as a broad, flat sheet.
=flat tendon
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