# Tutor profile: Nicholas V.

## Questions

### Subject: Biology

What are the net products of Glycolysis?

2 pyruvate and 2 NADH

### Subject: Anatomy

Explain what triggers aldosterone and its effects

One major system that leads to aldosterone release is the Renin-Angiotensin-Aldosterone system. This system is activated in the setting of hypovolemia, or low body volume. The body's goal in the setting of hypovolemia is to restore volume. The Renin-Angiotensin-Aldosterone system stimulates the release of Renin. Renin allows for the conversion of a protein called angiotensinogen to Angiotensin I. Angiotensin I is then converted to Angiotensin II by ACE. Angiotensin II leads to increased sodium reabsorption in the kidney via direct stimulation, as well as via aldosterone release. Aldosterone causes the implementation of sodium channels in the collecting tubule of the kidney. This leads to greater sodium reabsorption, which causes water to follow, increasing total body volume.

### Subject: Algebra

Solve for x: $$ (x^2 -49)/(x-7) = 50 $$

In order to solve this problem, the goal is to isolate the variable x to one side of the equation. The first step in breaking down a complex problem like this is to see if you can simplify anything to make it more easily manipulated. The denominator contains $$ x-7 $$, so we want to see if we can eliminate part of the numerator. Because we have a squared function in the numerator, we can factor it. $$ x^2 -49 $$ factors into $$ (x+7)(x-7) $$. Now we can cancel the numerator $$ x-7 $$ and the denominator $$ x-7 $$. This leaves us with, $$ x+7 = 50$$. In order to get x alone, we now need to move the 7 from the left side of the equation to the right side. In order to move it, we do the opposite operation. Since it is, +7, we need to subtract 7 from both side, leaving us with $$ x = 43 $$.

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