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❖ The correct answer choice would be B) function of the cell in the body.
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Both animal and plant cells have a mitochondria, lysosomes, a cell membrane, Golgi apparatus, and a nucleus, although the plant cell has a cell wall, chloroplasts, and vacuoles while the animal cell doesn’t
Answer;
-Positive charge
Prior to the arrival of a signal from a presynaptic input, the post-synaptic membrane is polar with a greater relative positive charge to the ECF
Explanation;
-Neurons talk to each other across synapses. In somatic neurons, an action potential arrives at the synapse causing synaptic vesicles to fuse with the presynaptic membrane. The pre-synaptic membrane releases acetyl choline via exocytosis into the extracellular of the synaptic cleft.
-The ACh diffuses across the cleft and binds to the ligand-regulated sodium channels. Activated sodium channels allow a rapid diffusion down its electrochemical gradient towards the ICF. The movement of positive charges to the ICT causes the relative charge across the membrane to become positive on the inner surface.
Answer:
the first stop is used to fill the micropipette tip and the second stop is used to dispense the content of the tip