Homeostasis
What is homeostasis?
Maintaining a stable internal environment. Examples: thermoregulation, osmoregulation
What type of pathogen do antibiotics treat?
Bacteria (NOT VIRUSES)
What is the main function of the immune system.
To protect the body from pathogens/harmful cells/viruses/bacteria.
What is natural selection?
The process where organisms with advantageous traits survive and reproduce more.
What shape is a quadratic function?
It is a U shape/ parabola
When your body temperature rises, you sweat. What type of feedback system is this?
Negative Feedback
Why don't antibiotics work on viruses?
Viruses are not living cells and use host cells to reproduce.
What type of cell helps identify and destroy pathogens?
White blood cells (WBC).
What is variation (in terms of a single trait)?
Differences in traits among individuals in a population.
What is another name for the solutions of a quadratic?
Possible answers: X intercepts, roots, zeroes.
Why does sweating help cool the body?
Evaporation of sweat removes heat from the body.
What is antibiotic resistance?
When bacteria evolve so antibiotics no longer kill them.
What do antibodies do?
Why are some individuals more likely to survive than others?
They have traits better suited to their environment.
This economic system operated during feudalism, where peasants worked the land and were bound to it in exchange for protection.
Manoralism
After eating, blood glucose rises and insulin is released. What is insulin's job?
To lower blood sugar by helping cells take in glucose.
How does misuse of antibiotics (like not finishing a prescription) lead to resistance?
Some bacteria survive and reproduce, passing on resistance traits.
How does a vaccine prepare the body to help fight disease?
It introduces a weakened or inactive pathogen so the body builds immunity.
Over time, why do helpful traits become more common in a population?
Individuals with those traits survive and reproduce more?
What is the term for this drawing technique that uses light and dark to create the illusion of depth?
Shading
A runner stops sweating during a race and collapses. Explain what went wrong in terms of homeostasis.
The body failed to regulate temperature; without sweating, heat builds up, causing overheating and system failure.
A patient demands antibiotics for a viral infection. Explain why this is a bad idea.
It won't treat the virus and can promote antibiotic-resistant bacteria.
Why does the immune system respond faster the second time you get the same disease?
Memory cells recognize the pathogen and produce anitbodies more quickly.
Explain how antibiotic resistance in bacteria is an example of natural selection?
Resistant bacteria survive antibiotics and reproduce, increasing the frequency of resistance in the population.
Who is the president on the 2 dollar bill?
Thomas Jefferson