110: In the distal tubules, salts are actively transported out through the sodium potassium pumps, which are regulated by aldosterone. Therefore, dehydration would not necessarily lead to a build up of salts in the distal tubule since salt movement is controlled through hormones. In contrast, answer...

Hi! These slides are already posted on the website under the Resources tab, subtab PDFs.

Whether an amino acid is positively, negatively, or neutrally charged depends on its pKa in relation to the pH. In this question, the pH is at 7. Since Histidine's side chain pKa is 6, this means that at pH 7, its amino group is protonated (+1), its carboxyl group is deprotonated (-1), and its side ...

74. If the object is being moved at an angle instead of directly up, then the angle would have to be considered into the equation. 75. Since the sound wave is being reflected off the imperfect reflector, it loses energy and therefore the frequency also changes since frequency is directly proportiona...

As Nancy said earlier, since the organism is only going from the 2 cell to 64 cell stages, we know that we aren't dealing with the development of germ cells. Instead, the organism is simply trying to multiply and grow in size in order to form the morula (what we call the organism that's at the 64 ce...

Physics 100: This question directs you to the passage, so the first step is to find which part of the passage describes why there is so much energy released as a nucleus splits. Specifically, it states that "There is a large electrical repulsion between these two fragments that causes them to move a...

Table 1 is concerned with the enthalpy changes that are occurring during the reactions for the three compounds. As the relative stability of the products is not discussed, distinguishing between the thermodynamic and kinetic products is not necessary for answering this question. Rather, the most fav...

Hi! I will reach out to someone about whether we can make this change and get back to you soon.

Hi! This concept is not a high yield concept that you need to memorize for the exam. This question is mainly asking you to infer from context clues whether C would be a good choice. The question refers to the spot in the passage where it describes how the embryo switches from anaerobic to aerobic me...

Hi! In order to answer this question, you're right that you just needed to have a general understanding of those basic demographic measures. Although absolute mobility can be used to track change over time, it can't be used to break up a population into different subgroups, which is why it does not ...