Health, Nutrition, and Disease

Which of the following infectious diseases is caused by a bacterium?

Passive immunity, such as that acquired by an infant through maternal antibodies in breast milk, stimulates the recipient's immune system to produce long-term memory B cells.

In the study of epidemiology and pathology, infectious diseases are categorized by the structural nature of their causative agents and the distinct cellular mechanisms through which they produce pathology. Match each infectious disease on the left with its corresponding pathogen classification and pathological mechanism on the right. How should these diseases and mechanisms be correctly paired?

A patient diagnosed with an acute influenza infection requests a prescription for amoxicillin, an antibiotic that specifically inhibits the synthesis of bacterial peptidoglycan cell walls. Which of the following best explains why this medication is ineffective against the patient's illness?

Iron is an essential dietary mineral required for the production of hemoglobin, which enables red blood cells to transport oxygen throughout the body.

Medical treatments for infectious diseases rely on the principle of selective toxicity, which involves destroying or inhibiting a pathogen without harming host tissues. While bacterial infections can often be effectively treated by targeting prokaryotic structures like peptidoglycan cell walls or 70S ribosomes, treating systemic infections caused by fungi or protozoans in humans carries a significantly higher risk of adverse toxic side effects. Which of the following best explains why developing safe pharmacological treatments against fungal and protozoan pathogens is more difficult than treating bacterial infections?

Match each essential vitamin on the left with its primary physiological function in the human body on the right.

Why are antibiotics ineffective in treating illnesses such as influenza and the common cold?

Vitamin D plays a critical role in human nutrition by facilitating the absorption of calcium in the digestive tract to support bone health.

Unlike macronutrients such as carbohydrates and fats, vitamins and minerals supply direct caloric energy to fuel cellular activities.

A medical team evaluates several recruits presenting with acute infectious symptoms at a training installation. Which recruit has a condition that can be cured by administering an antibiotic regimen?

In human nutrition, macronutrients serve distinct physiological roles to maintain cellular function and overall health. Match each dietary macronutrient on the left with its primary function in the body on the right.

Chickenpox, measles, and the common cold are infectious human diseases caused by which type of pathogen?

A clinical laboratory isolates an infectious agent from a patient presenting with acute respiratory symptoms. Microscopic and biochemical analyses reveal that the pathogen is a single-celled prokaryotic organism containing a peptidoglycan cell wall and its own functional ribosomes for protein synthesis. Based on these cellular characteristics, which type of pathogen is responsible for this infection?

A physician explains to a patient that certain antimicrobial medications, such as penicillin, function primarily by disrupting the synthesis of peptidoglycan cell walls. Which of the following best explains why these drugs are completely ineffective against viruses?

Dietary minerals are essential inorganic micronutrients required to sustain critical physiological and metabolic functions in the human body. Match each dietary mineral on the left with its primary physiological role on the right.

Unlike fat-soluble vitamins, excess water-soluble vitamins consumed in the diet are not stored in significant amounts in adipose tissue and are primarily excreted through the urinary system.

Public health teams responding to disease outbreaks must distinguish between bacterial diseases, such as cholera, and viral infections, such as dengue fever. Why are antibiotic medications effective in treating cholera but ineffective against dengue fever?

Infectious illnesses can spread rapidly in close community settings, making proper pathogen classification essential for effective treatment. What fundamental biological characteristic distinguishes viral pathogens from bacterial pathogens?

Malaria is an infectious disease caused by a protozoan parasite of the genus Plasmodium, rather than by a viral or bacterial pathogen.