Module 12 — Aldosterone-Response FailureA dehydrated patient has intact renin release, ACE activity, and angiotensin II signaling, but cells in the late distal tubule and collecting duct cannot respond to aldosterone.Predict whether renin, angiotensin II, and aldosterone levels will be low, normal, or elevated. Explain your predictions. (5 points)Predict the effects on sodium reabsorption and potassium secretion in the distal nephron. (5 points)Predict the effects on water retention, blood volume, and blood pressure. (4 points)Identify two actions of angiotensin II that can still occur despite aldosterone-receptor failure. (4 points)

If a patient loses a significant amount of blood, which of the following effects would be expected as part of RAAS activation?

A patient has low blood albumin (albumin is protein found in plasma) levels due to liver disease. Which filtration-related pressure is most affected, and what is the likely outcome?

A virus infects the cells lining the respiratory tract. Which process allows nearby cells to produce antiviral proteins before the virus spreads?

Module 10A virus prevents infected body cells from displaying viral antigens on MHC class I. Dendritic cells can still process viral particles and present antigens on MHC class II.Predict how the loss of MHC class I presentation will affect activation and killing by CD8⁺ cytotoxic T cells. Explain why. (6 points)Explain which CD4⁺ helper T-cell responses can still occur through dendritic-cell MHC class II presentation. (5 points)Identify the innate immune cell that is especially likely to attack cells with little or no MHC class I and explain its response. (4 points)Predict how the mutation will affect viral clearance overall. Explain why the remaining immune responses may not fully compensate. (5 points)

Metabolic reactions fall under two general categories: anabolic and catabolic.  What type of chemical reactions are these two classes of metabolic reactions?

A patient has symptoms consistent with a sexually transmitted bacterial infection. The clinician is especially concerned because this pathogen has developed resistance to multiple antimicrobial drugs, making treatment decisions more difficult. Which pathogen is most consistent with this concern?

In prokaryotes, the molecules proteins involved in the electron transport chain are:

Which statement best explains why microorganisms are essential to life on Earth?

One bacterium uses oxygen as the final electron acceptor in its electron transport chain. Another bacterium uses nitrate instead. Both use an electron transport chain. Why would the bacterium using nitrate usually generate less ATP?