17. Which structure of a Neuron converts an electrical signal/message into a che

Question

17. Which structure of a Neuron converts an electrical signal/message into a chemical signal/message? A. Dendrite. B. Synaptic terminal. C. Soma. D. Nucleus. E. Axon 18. Consider two eukaryotic cells. Cell A has a cytoplasmic salt concentration half that of typical seawater, which results in about a 1.6% salt concentration, whereas Cell B has a cytoplasmic salt concentration equal to physiological saline (0.9% salt), which statement is true? A. Cell A is hypertonic to Cell B. B. Cell B is hypotonic to Cell A. C. water is least concentrated in Cell A. D. Cell A contains less Sodium ions and Chlorine ions than Cell B. E. Answers A, B, and C are all true. 19. Do you remember the "All Teachers Go Crazy" rule? I hope so. Which of the following Nitrogen bases is not found in DNA. A. Adenine. B. Uracil C. Thymosine D. Guanine. E. Cytosine.

Explanation / Answer

17 - The correct answer is option B that is synaptic terminal that sends neurotransmitters that converts electrical signal to chemical signal.

18 - As cell A has more salt concentration, it is called hypertonic. Since cell B has less concentration than A, it is called hypertonic. Cell A has more solute concentration means water is least concentrated in cell A.

So, option E is the correct answer that is option A, B and C are all true.

19 - All teachers go crazy means DNA has adenine - All, Thymine - teachers, Guanine - Go and cytosine - crazy.

So, from the rule Uracil is not found in DNA. So, option B is the correct answer.

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