In this intro lesson on acid base disturbances in patients, begin with the basics, and get a clear understanding of the Henderson–Hasselbalch equation.

In this lesson, learn more about the role of bicarbonate, and how the anion gap (AG) and the CHEM-7 are used to identify metabolic acidosis.

Learn more about metabolic and respiratory acidosis and alkalosis, and possible patient responses to various combinations of HCO3 and pCO2 activity.

Take a closer look at how pH and pCO2 interact in the form of a graph, and learn the ratios for metabolic and respiratory acidosis and alkalosis.

Learn the steps for diagnosing acid base disorders, including how to use anion gap and a delta gap numbers, how to analyze pH and pCO2 ratios, and more.

In part 1 of this 3-part review on medical acid base disorders, follow along with Dr. Roger Seheult, and practice finding answers using various CHEM-7 values.

In part 2 of this 3-part Q & A on medical acid base disorders, practice finding answers based on CHEM-7 values, including calculating and using the delta gap.

This lesson wraps up the 3-part Q & A series on diagnosing medical acid base disorders, including a tricky common question on medical board exams.

When was the last time you had an epiphany sitting under an apple tree? In this physics lesson, learn Newton's First Law, and review the definition of force.

When you're in an elevator, can you tell you're moving? The answer to this physics question, clearly, involves forces! Learn to calculate force in newtons.