Bonus question: The primary differential for a patient with rectal bleeding must be: 

A 6 year old male child is brought into your office by his mother. He is lethargic and febrile. You note petichia on his trunk and extremities. He has not received any prior vaccines. Your most appropriate action at this time is to:  

A 65-year-old male with a history of diabetes presents to the emergency department with severe pain and swelling of the glans penis. He reports that his foreskin was retracted several hours ago during catheterization and has not been returned to its normal position since. On physical examination, you observe that the foreskin is trapped behind the glans, causing marked swelling and discoloration of the glans penis. Which of the following best describes the condition and the urgency of the required treatment?

Creatine phosphate (PC) is the primary energy source for activities lasting more than 3 minutes.

What is the primary role of the electron transport chain?

Why is the Krebs cycle so important if it only produces two ATP molecules?

Which nutrient yields the most ATP per gram?

What is the role of the enzyme ATPase during muscular contraction?

What is the term for oxygen consumption remaining elevated after exercise?

The end product of glycolysis under anaerobic conditions is: