0
What else can I help you with?
What stops muscle stimulation when the motor neuron ceases firing?
Acetylcholinesterase is the enzyme that stops muscle stimulation when the motor neuron ceases firing. This enzyme enables acetyl and choline to release their binding sites.
What adrenergic receptors are present on the rabbit ileum?
The rabbit ileum primarily possesses α1-adrenergic receptors, which are responsible for mediating smooth muscle contraction. Stimulation of these receptors by adrenaline or noradrenaline can lead to increased motility in the rabbit ileum.
What enzyme has to be present for acetylcholine to be broken down so that the muscle fiber can relax?
Acetylcholinesterase is the enzyme responsible for breaking down acetylcholine in the synaptic cleft, allowing the muscle fiber to relax. This enzyme catalyzes the hydrolysis of acetylcholine into acetate and choline, preventing continuous stimulation of the muscle.
Why does repetitive nerve stimulation result in decreased amplitude of the muscle contraction?
The destruction of ACh receptors makes skeletal muscle less responsive to nerve stimulation and more likely to prematurely fatigue. With fewer ACh receptors available to bind to ACh, the skeletal muscle cell membrane potentials have a more difficult time reaching the threshold potential and initiating contraction. Thus, the normal degree of fatigue noted during repetitive nerve stimulation is exacerbated in an individual with myasthenia gravis.
What are the effects of alpha-1 receptor stimulation?
Stimulation of alpha-1 receptors causes vasoconstriction, leading to an increase in blood pressure and pupil dilation. It can also result in smooth muscle contraction in organs such as the bladder and intestine.
What would happen in acetylcholinesterase was absent?
If acetylcholinesterase were absent, acetylcholine would accumulate in the synaptic cleft, leading to prolonged stimulation of postsynaptic receptors. This could result in continuous muscle contraction, paralysis, or overstimulation of the nervous system, potentially causing symptoms such as muscle spasms and respiratory failure. Ultimately, the absence of this enzyme disrupts normal neurotransmission and can be life-threatening.
What are beta-1 receptors found?
There are at lest 3 types of beta receptors and they are found in different organs. Beta-1 (β1) receptors are found in the heart, eye, and kidneys while beta (β2) receptors are found in the lungs, gastrointestinal tract, liver, uterus, blood vessels, and skeletal muscle. The third type, beta (β3) receptors are found in fat cells.
Is Cardiac muscle stimulation neural?
No, but skeletal muscle is.
What conclusions can you draw about the relationship between a muscle's workload and its threshold of stimulation?
As the muscle workload increase, its threshold of stimulation increases.
Why does the force of a muscle decrease over time during uninterrupted stimulation?
The muscle is said to undergo Fatigue.
What are the differences between EMS and NMES and how do they impact muscle stimulation and rehabilitation?
EMS (Electrical Muscle Stimulation) and NMES (Neuromuscular Electrical Stimulation) are both forms of electrical stimulation used in muscle rehabilitation. EMS primarily targets muscle fibers to improve strength and endurance, while NMES focuses on stimulating nerves to activate muscle contractions. EMS is often used for muscle building and recovery, while NMES is commonly used for rehabilitation and muscle re-education. Both techniques can be effective in improving muscle function and aiding in recovery, but their specific applications and impacts on muscle stimulation differ.
After nervous stimulation of the muscle cell has ceased the calcium in the muscle?
uhhh
