The connection between a tooth and jaw bone is an example of a joint.
Answer the following statement true (T) or false (F)
True
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Exocytosis occurs as a result of
A. concentration gradients. B. the expenditure of energy in the form of ATP. C. hydrostatic pressure. D. ion pumps. E. molecular movement with carrier assistance.
White blood cells engulf bacteria through the process of __________.
Fill in the blank(s) with the appropriate word(s).
You are examining the data from two time points taken in an experiment. At time 1 there was an extracellular concentration of Na+ of 115 mM outside the cell and 8mM inside the cell. An amino acid, lycine, is at 20mM outside and 40mM inside. At the second time measured Na+ is 100mM outside the cell and 23 mM inside the cell. Lycine is 15 mM outside the cell and 45mM inside. What is the best explanation?
A. Both Na+ and the amino acid bind on the side of the membrane where the Na+ concentration is higher, and both are transported to the side of the membrane where the Na+ concentration is lower. B. Na+ and the amino acid bind to opposite sides of the membrane, and the amino acid undergoes net transport from the side of the membrane with lower Na+ concentration to the side of the membrane where the Na+ concentration is higher. C. Both Na+ and the amino acid bind on the side of the membrane where the Na+ concentration is lowest, and undergo net movement to the other side of the membrane. D. Both Na+ and the amino acid bind to the side of the membrane where the amino acid concentration is lower and are transported toward the side of the membrane where the amino acid concentration is higher. E. Na+ and the amino acid bind to opposite sides of the membrane, and Na+ undergoes net transport from the side of the membrane with higher Na+ concentration toward the side with lower concentration, while the amino acid moves in the opposite direction.
When the radius and ulna are parallel with one another, the forearm is said to be in pronation.
Answer the following statement true (T) or false (F)