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Which of these junctions represents the connection between the tip of a neuron and a skeletal muscle cell from which Acetylcholine diffuses?
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∙ 10y ago
Neuromuscular
Wiki User
∙ 10y ago
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When acetylcholine diffuses across syaptic cleft?
Like any other neurotransmitter, acetylcholine will attach itself to active sites on the dendrite, thus triggering the opening of sodium gates of the next neuron. Once that's done, the acetylcholine either breaks down or is absorbed back into the cell it originated from.
Describe the interaction of acetylcholine and calcium ions in stimulating muscle contraction?
The acetylcholine diffuses across the synapse and binds to and activates nicotinic acetylcholine receptors on the motor end plate of the muscle cell. Activation of the nicotinic receptor opens its intrinsic sodium/potassium channel, causing sodium to rush in and potassium to trickle out.
When acetylcholine diffuses across the synaptic cleft and binds to receptors on the folded sarcolemma it initaly causes what channels to open in the sarcolemma?
Chemically gated Na+ ions.
What Neurotransmitter diffuses across a synapse to a muscle cell?
It varies: In the somatic system (skeletal muscle) and parasympathetic branch of the autonomous nervous system (smooth & cardiac muscle) it is usually acetylcholine. In the sympathetic branch of the autonomous nervous system (smooth & cardiac muscle) it is usually norepinephrine (also called noradrenaline). There are exceptions, but this is the general rule.
What is the normal sequence of events that occur during synaptic transmission at a motor end plate?
1. Nerve impulse reaches synaptic terminal. 2. Synaptic vesicles move to and merge with the presynaptic cell membrane of the motor neuron. 3. Acetylcholine is released into and diffuses across the synaptic cleft. 4. Acetylcholine binds to receptors on the postsynaptic cell membrane of the muscle fiber.
Do fetuses need a mechanism for respiratory exchange?
yes they do.and this need is served by the PLACENTA-a vascular connection between the mother and the foetus,where oxygen diffuses from the mothers blood to that of foetus and CO2 DIFFUSES FRM FETUSE'S BLOOD 2 MOTHERS.BUT,THEIR BLOOD R NOT IN DIRECT CONTACT.
Name the gas that moves in and out of body cells?
Oxygen diffuses into cells. Carbon dioxide diffuses out.
What diffuses from the kidney back into the blood stream?
Water diffuses from the kidney back into the blood stream.
What is the name of the cell that releases the neurotransmitters?
Exocytosis. As a result of the influx of Calcium ions, the synaptic vesicles transport the neurotransmitter Ach (Acetylcholine) to the presynaptic membrane, the vesicles fuse to the membrane, and the neurotransmiffer, Ach, diffuses. Once the neurotransmitters cross the synaptic cleft, they bind to the receptors on the post synaptic membrane. Hope it helps a bit.
What is it called when heat diffuses off an object into the surrounding air?
Thermal radiation is when heat diffuses off hot surfaces
The water in a cell does what?
diffuses in and out of the cell
Which gas diffuses the oxygen?
carbon
