he proposed that the atom was mostly empty space . the electrons revolve in curcular orbits about the massive positive charge at the centre his model explained how most of the a particles passed straight through the foil .the small particle nucleus would deflect the few particles that came close ..
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Answer:
The correct answers are: Neurotransmitter Vesicles, Acetylcholine, Contraction.
Explanation:
- At the neuro-muscular junction, impulses are transmitted in the following manner:
- The impulse is carried by an action potential (variable opening and closing of different ion channels located on the membrane of the neurons allowing variable ion movement) to the neuron at the neuro-muscular junction.
- The action potential causes the opening of the voltage dependent calcium channels in the axon terminal of the neuron allowing the entry of calcium ions.
- This causes the neurotransmitter vesicles containing the neurotransmitter acetylcholine to fuse with the pre-synaptic membrane.
- Acetylcholine is released by the method of exocytosis into the synaptic cleft.
- The acetylcholine molecules bind to the the cognate receptors present in the membrane of the muscle cell (sarcolemma).
- This causes the flow of sodium ions into and potassium ions out of the muscle cell, which generates action potential in the muscle cell.
- This action potential causes the muscle cell to contract.
The population of producers would get larger as nothing would be eating them anymore.
Answer:
The chromosomes are in the nucleus. :)
Answer:
1
Explanation:
The pH scale goes from 0 to 14. 0 is the most acidic and 14 is the most basic so the middle, 7, is neither acidic or basic. Anyway, thos most acidic rating is the lowest number, so here that's 1
