Homeostasis, Positive Feedback Loop, Negative Feedback Loop

homeostasis

process by which living things maintain steady and tolerable physical conditions; maintain balance

Examples of homeostasis

sweating, shivering, goosebumps

Negative Feedback Loop

a way for your body to stop something to restore balence

stimulus

deviation from a set point

5 Parts of Negative Feedback Loop

stimulus, sensor, control, effector, and response

Positive Feedback Loop

results in a change in the body’s status, rather than a return to homeostasis; keeps an event going when stimulated

Example of Positive Feedback Loop

childbirth, blood clotting

4 Main Organic Macromoleculues

lipids, nucleic acid, carbohydrates, and proteins

lipids

fat and oils (from plants)

nucleic acid

DNA and RNA

carbohydrates

simple sugars, complex sugars

proteins

enzymes

DNA

set of instructions cells use to build proteins

RNA

the messenger, takes a copy of code and takes to ribosome to create proteins

3 Main Types of Symmetry

asymmetry, radial symmetry, bilateral symmetry

asymmetry

different appearance when split in half; not even distribution

radial symmetry

occurs when multiple planes mirror one another

bilateral symmetry

occurs when only one plane (sagittal) that mirrors the other

macromolecules

made by building blocks like monomers or several copies of a single unit

monosaccharide

1 monomer (sugar)

disaccharide

2 monomers (2 sugars)

polysaccharide

many monomers/ sugars

—> e.g. starch, carbs