Which of the following lists the correct order of blood flow through the heart and lungs, beginning with blood returning from the body?

Which statement below best describes a mechanistic link between the gut microbiome and increased risk of atherosclerotic cardiovascular disease?

The TNM cancer staging system classifies cancers based on which three disease characteristics?

A cohort study reports baseline lifetime breast cancer risk of 3% in women with normal BMI. If high BMI multiplies risk by 3 (midpoint of the 2–4× range), calculate the expected lifetime breast cancer risk for women with high BMI and explain the public-health implication for a population of 10,000 women.

Which type of cancer originates in the cartilage or skeletal muscle?

A patient has a baseline 5-year risk of developing type 2 diabetes of 30% with prediabetes. The National Diabetes Prevention Program can cut that risk by more than half. Which statement correctly expresses the maximum possible new risk after completing the program?

Select the single answer that lists the correct true statement(s) about diabetic ketoacidosis (DKA).

(i) There is an increased breakdown of muscle protein for energy.

(ii) The blood becomes more acidic due to ketone accumulation.

(iii) The brain is unable to use ketones and thus depends solely on glucose.

(iv) Acute DKA leads to enhanced renal function overall.

A patient tests positive for a respiratory virus but reports no symptoms for three days after exposure. On day four they develop fatigue and mild cough that make their commute and concentration at work more difficult. According to the infection-to-disease distinction, which transition occurred and what is the practical implication for workplace attendance?

A university must choose between three policies during a mild respiratory virus outbreak: universal masking in classrooms, mandatory twice-daily surface disinfection of shared spaces, or a strict symptom screening that excludes anyone with any respiratory symptom. Using an evidence-based evaluation of the chain of infection, which policy is likely to most effectively reduce transmission on campus and why?

Which of the following accurately lists five routes of disease transmission along with brief descriptions of each?

A hospital reports an influenza attack rate of 12% among staff working in wards with poor ventilation and 3% among staff in well-ventilated wards. As an infection-control evaluator, compute the relative risk and determine which intervention would most directly reduce this occupational risk based on the calculated value.

Which of the following best describes the fundamental principle of how most modern vaccines protect people?

After finishing antibiotics for bronchitis, 80-year-old George develops frequent watery diarrhea, nausea, and a slight fever. Which infection should be suspected as the MOST likely cause?

You wake up with a sudden, intense headache, sensitivity to light, and vomiting. When you try to touch your chin to your chest, your neck is extremely stiff and painful. Your friend notices you are very warm to the touch and look unwell. Which of the following statements is TRUE?

A traveler returning from a tropical region has cyclical high fevers and severe headache starting two weeks after returning; malaria smear is positive for Plasmodium falciparum. Simultaneously, a roommate presents with profuse watery diarrhea after drinking unboiled well water. Which of the following management plans correctly pairs each patient with the most appropriate immediate clinical action?

Sofia was vaccinated against HPV before becoming sexually active. The vaccine lowers her risk for

A 28‑year‑old patient is diagnosed with early secondary syphilis (skin lesions and positive serology). Which statement best describes the appropriate role of penicillin in treatment?

What is the primary immunologic mechanism by which HIV infection increases susceptibility to opportunistic infections?