Acetylcholine is the fundamental neurotransmitter that transmits information from nerve cells to muscles. It is released by synaptic vesicles and binds to receptors on the muscle membrane.
- In order to stimulate muscle contraction, acetylcholine is released from the SYNAPTIC VESICLES into the synaptic cleft.
- Synaptic vesicles are a type of small organelle clustered at presynaptic terminals.
- These vesicles (synaptic vesicles) are responsible for the uptake, storage, and release of different neurotransmitters.
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Answer: starting at the right atrium. A: blood that hasn't been took in oxygen from the body enters into the right atrium. This blood mixes with oxygenated blood from the left atrium in the ventricle. This semi-oxygenated blood is sent out of the hearth through the main artery.
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