The part of the gastrointestinal tract with the largest natural microbiota is the Large intestine.
Missing Word
Large intestine
The large intestine, particularly the colon, provides a nutrient-rich, anaerobic environment and a large surface area conducive to the growth and maintenance of a diverse and abundant microbial community. This extensive microbiota plays a crucial role in digestion, vitamin synthesis, and immune system development.
Question 2
When plaque becomes heavy and hardened, it is called dental calculus or tartar.
Missing Word
tartar
Dental plaque, a biofilm of bacteria, can mineralize over time due to the deposition of calcium and phosphate salts from saliva. This hardened deposit, known as dental calculus or tartar, provides a rough surface that promotes further plaque accumulation and can contribute to periodontal disease.
Question 3
Antibiotic associated pseudomembranous colitis is caused by Clostridioides difficile.
Missing Words
Clostridioides, difficile
Clostridioides difficile is an opportunistic pathogen that can proliferate in the gut when the normal microbiota is disrupted by antibiotic use. It produces toxins that cause inflammation and damage to the colon, leading to pseudomembranous colitis.
Question 4
Jaundice results from a buildup of bilirubin.
Missing Word
bilirubin
Bilirubin is a yellow pigment produced during the breakdown of heme in red blood cells. Jaundice, characterized by yellowing of the skin and eyes, occurs when bilirubin accumulates in the blood due to liver dysfunction, bile duct obstruction, or excessive red blood cell destruction.
Question 5
Chronic giardia infections cause the unique sign of disease of greasy stool and are often resistant to treatment.
Missing Word
giardia
Giardia lamblia is a protozoan parasite that infects the small intestine, causing giardiasis. Chronic infections can lead to malabsorption of fats, resulting in greasy stools (steatorrhea), and some strains exhibit resistance to common anti-parasitic drugs.
Question 6
Liver flukes are often found in the bile duct.
Missing Word
bile
Liver flukes, such as Clonorchis sinensis and Opisthorchis viverrini, are parasitic worms that infect the bile ducts of humans and other mammals. They cause inflammation and obstruction of the bile ducts, leading to liver damage and potentially cancer.