Biology, 29.10.2020 09:00 washingtonisaia
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place the events of a nerve impulse on a neuron in the order that they occur
Neurons receive stimulation causing local potentials until they reach the threshold
Sodium (Na) ions diffuse inward, changing the electric charge of the membrane, depolarizing it.
Sodium channels in the trigger zone of the axon open.
Potassium channels in the membrane open.
When the signal reaches the end of the axon, the synaptic knob releases a neurotransmitter (a chemical messenger) which takes the signal to the next neuron, muscle cell or gland.
The resulting action potential causes a wave of exchanging of ions down the membrane which causes an electric current to travel down the axon.
Potassium (K) ions diffuse outward, repolarizing the membrane.
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Biology, 21.06.2019 21:30
Which of these best describes wde by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm
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Biology, 22.06.2019 03:30
Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. single-celled organisms may use cell division as their method of reproduction. regardless of the reason for mitosis, the process ensures genetic continuity. what is the step in the cell cycle that ensure genetic continuity?
Answers: 3
Biology, 22.06.2019 12:00
How long does it take a skateboarder going 6.0 m/s to come to a complete stop if she slows down at a rate of 2.0 m/s^2
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place the events of a nerve impulse on a neuron in the order that they occur
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