Homeostasis
What is HOMEOSTASIS?
The "normal" range of internal conditions that the body must maintain in order to survive.
What is Thermoregulation?
Temperature balance
What is Natural Selection?
Survival of the fittest. Those that are less fit do not survive and reproduce. Those that are more fit have a better chance of surviving and reproducing.
What is a FEEDBACK MECHANISM
When the body can sense and respond to a stimulus to maintain homeostasis
What is Osmoregulation?
Water balance
Name one example of SELECTIVE PRESSURE.
Predators, climate change, disease
Give an example of NEGATIVE feedback you experience during the school day
EX. Sweating, increased heart rate, breathing faster when running in gym class. Avoiding hot surfaces in the cafeteria. Running inside out of the cold. Drinking water when you're thirsty. Eating food when you're hungry. Etc.
What happens to the amount (aka rate) of inputs and outputs of cellular respiration when you increase exercise (resting to running)
If exercise increases then you need to make more ATP to keep going, so you need to take in more inputs and put out more outputs. They both INCREASE.
What is the name of the small pieces of DNA contained in your chromosomes? What do these small pieces do?
Genes, give your body directions for how to build itself.
For feedback mechanisms to work you must be able to __________ and ___________ to environmental stimuli.
sense/respond
What happens to blood glucose levels when you eat a sugary snack and then lay in bed.
They increase and stay at raised levels since you aren't using the glucose to make energy. You don't need energy when you are laying in bed. The glucose stays in the blood.
In order for new traits to appear in a population, 1 of 2 things have to happen...
There are random mutations to genes that change the directions for making certain traits into new directions for new traits, OR sexual reproduction recombines genes from both parents into new genes for new traits in their offspring.
Name two (2) types of feedback we learned about AND explain how they work.
Thermoregulation (temp reg.)
Osmoregulation (water/solute balance reg.)
Glucose (energy reg.)
Oxygen (gas/energy reg.)
Etc.
If outside of a cell is hypertonic, and inside is hypotonic, what way will water move? Into or out of the cell?
There is less water outside the cell (hyper means a lot, tonic is the other stuff like salts and sugars) so water will flow out of the cell (to balance out where there isn't a lot of water)