Microorganisms and Human Health

The video explores the vast ecosystem of microorganisms living in and on the human body, highlighting their crucial roles in maintaining health by protecting against infections and aiding in nutrient synthesis. It discusses the diversity of these microbes and the potential harm caused by excessive use of antibiotics and antimicrobials, which can disrupt the natural balance of microbiomes, leading to long-term health issues.

What is the primary role of microorganisms on human skin?

• To cause infections

• To secrete a protective film

• To synthesize vitamin K

• To keep the skin dry

How do Lactobacillus bacteria benefit the nasal cavities?

• By increasing infections

• By synthesizing vitamin K

• By reducing inflammation

• By causing sinusitis

What is the effect of microbial presence in the nasal cavities?

• Increases inflammation

• Dries out the nasal passages

• Crowds out invaders

• Causes infections

What essential nutrient do Bacteroides help synthesize in the colon?

• Vitamin B12

• Vitamin D

• Vitamin C

• Vitamin K

What is the relationship between humans and their microbiota described as?

• Competitive

• Symbiotic

• Hostile

• Parasitic

Approximately how many microbial cells are present in and on the human body?

• 10 million

• 100 trillion

• 1 quadrillion

• 100 billion

What is the significance of the human body being described as an ecosystem?

• It is unaffected by antibiotics

• It is isolated from external environments

• It hosts a diverse range of microbial species

• It has a single type of microorganism

What has been the impact of nearly a century of antibiotics on our microbiome?

• It has increased the number of good bacteria

• It has caused extensive damage

• It has had no effect

• It has improved microbial diversity

What is a potential consequence of early impact on the microbiome?

• Increased microbial diversity

• Temporary imbalance

• Permanent damage

• Improved health

Which of the following is NOT a role of microorganisms in the human body?

• Causing permanent damage

• Synthesizing essential nutrients

• Protecting against infections

• Reducing inflammation