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Alexandra M.
Science Tutor
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Biology
TutorMe
Question:

What must occur in order for muscle contraction?

Alexandra M.
Answer:

Calcium must bind troponin so that tropomyosin can move and myosin can bind actin in order to cause a power stroke, and therefore muscle contraction

Biology
TutorMe
Question:

What happens is the difference between the descending and ascending loop of henle?

Alexandra M.
Answer:

The ascending limb is impermeable to water but is permeable to ions, whereas the descending limb is permeable to water and impermeable to ions

Anatomy
TutorMe
Question:

What is that largest vein in the human body?

Alexandra M.
Answer:

The inferior vena cava

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