System and System Models
Yes
What is the smallest unit of life?
The cell
What is the definition of homeostasis?
Maintain an internal stable environment
What are the 5 levels of organization that we went over?
Cell, Tissue, Organ, Organ System, and Organism
What is the powerhouse of the cell?
Mitochondria
What is the definition of a system boundary?
Something that contains the system and separates it from the rest of the universe.
How many parents does asexual reproduction require?
1 parent
What happens to the hair on our skin when we are cold?
The hair on our skin stands up because of the goosebumps we get.
Organisms
True or false, animal cells have a cell wall?
False, only plant cells have a cell wall.
What does a closed system exchange with its environment?
Only energy
What process uses chemical reactions in an organism to build up or break down materials?
Metabolism
What part of the brain regulates body temperature?
Hypothalamus
Which level of organization is made of similar cells working together? For example, many muscle cells working together.
Tissue
What is the cell membrane composed of?
Individual phospholipids and transport proteins.
What are the 5 properties of a System?
Boundaries, Components, Inputs, Outputs, and Controls
In what molecule is an organisms genetic code written?
DNA
What is vasodilation? (Bonus: When does this happen?)
When our blood vessels expand, to let more blood flow near skin. This happens when we are hot.
Give me 3 examples of an organ.
Various answers
Examples: heart, lungs, brain, bladder, and stomach
The diffusion of water across a membrane; the rule to remember is "salt sucks".
What are the boundaries and components of a cell phone?
boundaries - case of phone (front and back of phone)
components - parts (battery, processor, buttons)
What are the 9 characteristics of living things?
What issues can come up when your body is not performing thermoregulation correctly?
Which is more complex the heart or the circulatory system, and why?
The circulatory system, because it is made up of many different organs and the heart is only one organ.
Why is it dangerous to drink sea water?
There is too much salt in the water which will make your cells hypertonic. This causes your body to get dehydrated, because your kidneys will make you pee out more water than what you drank.