Microbiology: Human Exposure to Microbes
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Microbiology: Human Exposure to Microbes

This quiz covers the importance of microbe exposure in humans, the primary routes of exposure, and the sites of permanent microbe residence. It also explores evidence from germ-free animal models, highlighting the role of microbes in postnatal development.

Created by
@LuckyLightYear

Questions and Answers

What is the primary site of permanent microbe residence in the human body?

Skin

What is an example of how postnatal exposure to different sources of flora can influence health and development?

Caesarean section instead of normal birth

What is an example of a systemic body function that is influenced by gut microbe-mediated developmental outcomes?

Spleen development

What is the term for an interaction where one organism is inhibited and the other is not affected?

<p>Amensal</p> Signup and view all the answers

Why do germ-free mice models have defective spleen cells?

<p>Due to lack of gut microbiota</p> Signup and view all the answers

What is the term for an interaction where both organisms benefit?

<p>Mutualist</p> Signup and view all the answers

What is the primary characteristic of a parasitic relationship?

<p>One side benefits at the other’s expense</p> Signup and view all the answers

What is the estimated number of bacteria in the human colon?

<p>10^11 to 10^12</p> Signup and view all the answers

What is the primary function of bacteroides and firmicutes in the gut?

<p>Consuming polysaccharides and performing fermentative metabolism</p> Signup and view all the answers

What is the consequence of a lack of gut microflora on the enteric nervous system?

<p>Underdeveloped enteric nervous system</p> Signup and view all the answers

What percentage of microbial cells in the human body are bacteria?

<p>98%</p> Signup and view all the answers

What is the term for the relationship between two organisms where one benefits and the other is not affected?

<p>Commensalism</p> Signup and view all the answers

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