Is the statement below True or False? Postganglionic parasympathetic neurons are cholinergic.

A depolarization is when the inside of a neuron becomes _______________ the resting membrane potential. 

Compare the values below. Which is greater, or are the two values equal? A. Ca2+ levels in the sarcoplasmic reticulum of a relaxed muscle cell B. Ca2+ levels in the cytoplasm of a relaxed muscle cell

Is the statement below True or False? In skeletal muscle cells, t-tubules are responsible for carrying calcium deep into the cell.

Is the statement below True or False? Postganglionic parasympathetic neurons are cholinergic.

Use the figure above to answer the questions below: Why does tension increase with increasing stimulus voltage?  Explain why muscle A generates higher tension at the same voltage than muscle B does. If we continued to increase the stimulus voltage, would you expect the tension to increase indefinitely? Why or why not? 

EXTRA CREDIT (2 points) List one similarity and one difference between the items listed below. If a term appears in parentheses after the pair, both your answers must be related to that term (e.g. if the term says “structure” your answer must relate to anatomy). Categorizations (e.g. “both are bones”) and locations are not acceptable as answers. Your answer must address something specific to the items you are comparing. Vague answers (e.g. “contains cells”) will receive less or no credit.  Skeletal muscle & cardiac muscle (structure)

Short-answer: Write the words or phrases or sentences that correctly answers the question. Briefly explain why skeletal muscle cells contain high amounts of creatine. Your answer should address the function of this molecule in muscle cells.

EXTRA CREDIT (2 points) List one similarity and one difference between the items listed below. If a term appears in parentheses after the pair, both your answers must be related to that term (e.g. if the term says “structure” your answer must relate to anatomy). Categorizations (e.g. “both are bones”) and locations are not acceptable as answers. Your answer must address something specific to the items you are comparing. Vague answers (e.g. “contains cells”) will receive less or no credit.  Parallel muscle & circular muscle

Short-answer: Write the words or phrases or sentences that correctly answers the question.  Compare the role of calcium in skeletal and smooth muscle contractions. Include the structures calcium binds to, each step of the contraction, and relevant structures involved in the contraction.