The formula for oxygen gas is O2, this means it is:
a. made up of two atoms of oxygen
b. a molecule
c. a compound
d. both A and B above
d. both A and B above
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Which of the following describes how a presynaptic neuron would communicate a strong signal to a postsynaptic neuron?
A. Changing the destination of the action potentials B. Changing the direction the action potentials are traveling down its conductive segment C. Increasing the frequency of its action potentials D. Increasing the magnitude (voltage change) of each action potential
Starting from the collecting duct, indicate the order in which urea molecules move to maintain the medullary concentration gradient. (1) ascending limb
(2) distal convoluted tubule (3) interstitial fluid (4) collecting duct (5) descending limb A. 2, 5, 1, 4, 3 B. 1, 3, 5, 2, 4 C. 3, 5, 1, 2, 4 D. 4, 2, 1, 3, 5 E. 4, 3, 5, 1, 2
A phospholipid differs structurally from a triglyceride in that it has three phosphate groups attached to the glycerol molecule rather than three fatty acid chains.
Answer the following statement true (T) or false (F)
Microtubules are organized in cells with the ends near the nucleus in a region known as the __________, or MTOC for short
Fill in the blank with correct words.