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What neurotransmitter causes muscle movement?
Acetylcholine is the primary neurotransmitter responsible for muscle movement. It is released from motor neurons at the neuromuscular junction to stimulate muscle contraction.
Which neurotransmitter is responsible for the excitatory phase of muscle contraction a. dopamine b. serotonin c. GABA d. none of the above?
None of the above. The neurotransmitter responsible for the excitatory phase of muscle contraction is acetylcholine. It is released from motor neurons at the neuromuscular junction to stimulate muscle fibers.
What substance is released by the nervous system and excites muscle cells?
Acetylcholine is the neurotransmitter released by the nervous system that excites muscle cells, leading to muscle contraction.
Role of ionic calcium in muscle contraction?
Ionic calcium plays a crucial role in muscle contraction by binding to the protein troponin, which then allows for the movement of tropomyosin, enabling myosin heads to bind to actin filaments and form cross-bridges. This process ultimately leads to muscle fiber contraction.
What energy molecule is responsible for muscle contraction?
Calcium, it's found in the Sarcoplasmic Reticulum.
What does the normal gene responsible for hypokalemic periodic paralysis responsible for?
The normal gene is responsible for a muscle protein controlling the flow of calcium during muscle contraction.
What ion is responsible for the contraction of cardiomyocytes?
Calcium ions are primarily responsible for the contraction of cardiomyocytes. When calcium ions enter the cardiomyocyte, they trigger the muscle fibers to contract by binding to the regulatory proteins that control muscle contraction. This process is crucial for the heart to effectively pump blood throughout the body.
What neurotransmitter is released at the neuromuscular junction?
Acetylcholine is the primary neurotransmitter released at the neuromuscular junction. It is responsible for transmitting signals from motor neurons to muscle fibers, leading to muscle contraction.
Where is calcium stored in a relaxed skeletal muscle?
yes calcium is stored in muscles as it is necessary for muscle contraction and muscle contraction is very sensitive to the amount of calcium
What is calcium used in muscle system for?
Calcium plays a crucial role in muscle contraction. When a muscle cell is stimulated by a nerve impulse, calcium ions are released from the sarcoplasmic reticulum into the cytoplasm. This increase in calcium concentration allows the interaction between actin and myosin, the proteins responsible for muscle contraction, enabling the muscle to shorten and generate force. Additionally, calcium is involved in the relaxation process by helping to return the muscle to its resting state.
What is the first step toward generating a skeletal muscle contraction?
The first step toward generating a skeletal muscle contraction is the release of acetylcholine (ACh) at the neuromuscular junction. This neurotransmitter binds to receptors on the muscle fiber's membrane, leading to the depolarization of the muscle cell and the initiation of an action potential. This depolarization triggers the release of calcium ions from the sarcoplasmic reticulum, ultimately leading to muscle contraction.
Which motor neuron is in charge of muscle contraction?
The motor neuron responsible for muscle contraction is the alpha motor neuron. These neurons reside in the spinal cord and project to skeletal muscles, where they release the neurotransmitter acetylcholine at the neuromuscular junction. This release initiates muscle contraction by triggering action potentials in muscle fibers, leading to their shortening and generating movement.
