BIOS 251 Chapter 7 - 2. Human body is a rich habitat for symbiotic b...

SUBSCRIBE

BIOS 251 Chapter 7

• quorum sensing

–Answer Communicate and cooperate in the formation and function of biofilms

• Human body is a rich habitat for symbiotic bacteria, fungi, and a few proto- zoa

–Answer normal microbial flora

• What makes antibiotics more resistant

–Answer Over exposure Over prescribing Not finishing prescription

• Pathogen

–Answer Any microbe that can cause disease

• Opportunistic pathogen

–Answer When healthy microbes lose competition

• Mutualism

–Answer -symbiotic

• both members benefit
• Commensialism

–Answer -symbiotic -it benefits without harming the host

SUBSCRIBE

• Parasitism

–Answer -symbiotic -parasite benefits and harms the host

• Synergism

–Answer -Nonsymbiotic

• members cooperate and share nutrients
• Antagonism

–Answer -nonsymbiotic -some members are inhibited and destroyed by others

• Heterotroph

–Answer Eats other carbon based life; humans are heterotroph

• Autotroph

–Answer Uses C02 as carbon source, not dependent on other living things; think of plants

• Chemotroph

–Answer Gain energy from chemical compounds

• Phototrophs

–Answer Gain energy through photosynthesis

• Passive transport

–Answer Does not require energy; moves from higher concentration to lower concentration

SUBSCRIBE

Example –Answer diffusion, osmosis, facilitated diffusion

• Osmosis

–Answer diffusion of water

• Facilitated diffusion

–Answer Requires a carrier

• Active transport

–Answer Requires energy and carrier proteins; protein is "pumping" Examples –Answer endocytosis & exocytosis

• Endocytosis

–Answer bringing substances into the cell through a vesicle or phagosome

• Phagocytosis

–Answer Ingests substances or cells

• Pinocytosis

–Answer Ingests liquids

SUBSCRIBE