The line at which the earths surface and the sky appear to meet
Helpful bacteria found in the gut are <u>not pathogens</u>.
Explanation:
An organism is said to be pathogenic if it can invade, grow and multiply in an individual host’s body and cause disease in the susceptible host’s body by evading the immune system of the host.
Viruses belong to obligate pathogen because they require the cellular machinery of the host’s body to grow and replicate and thereby will cause disease in the host.
Disease-causing bacteria are pathogenic like Salmonella, C. difficile, etc.
Helpful bacteria of the gut also called the human gastroinstestinal or gut microbiota, or the gut flora are those bacteria living in the digestive system of the body and improve the gut health. Gut bacteria like Lactobacillus generally help by:
- Forms a central line of resistance or barrier and prevents exogenous bacterial colonization and protects the intestinal mucosa from other pathogens
- Help in fermentation of undigested or nondigestible food or carbohydrates like large polysaccharides of cellulose, pectin etc.
- Gut bacteria belonging to the commensal bacteria help by digesting the available unused nutrients in the body
- Gut bacteria help in the synthesis of certain vitamins
Answer:
prevents secretion of upper air passage
Explanation:
to prevent foods and drinks from falling down the airway which is called aspiration and may lead to pneumonia
Answer:
Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can exploit these properties. Helium was the first gas used for filling balloons and dirigibles.
Answer:
True because at things like a metal string heats up, the molecules go faster which creates the thermal energy
