Homeostasis
What are the 3 mechanisms that aid in homeostasis?
receptors, control center, and effectors
Describe the heads and tails of the plasma membrane
hydrophilic heads, hydrophobic tails
The longest part of cell cycle, where the cell performs normal functions
Interphase
Active transport differs from passive transport because it requires...
ATP Energy! (also goes against the concentration gradient)
The electron shell around an atom is most stable if it contains ___# electrons
8 electrons
In homeostasis, the receptor does what?
Detects information (or a stimulus) from the environment
This substance is embedded in the plasma membrane to create structure and support
cholesterol
What occurs during metaphase?
duplicated chromosomes line up along the middle of the cell
In osmosis, a hypotonic solution would cause what to happen to the cell?
More water moves INTO the cell (lysed/fills up)
An acidic solution contains more ____ ions
hydrogen (basic has more hydroxide)
In homeostasis, the effector does what?
Acts on the commands from the control center (creates a response).
What organelle produces proteins for the cell?
ribosomes
What occurs during Anaphase?
the sister chromatids separate and migrate toward opposite ends of the cell
A carrier or channel protein is required in what type of passive diffusion?
Facilitated diffusion (still goes along a concentration gradient)
mass number = ___ + ___
protons + neutrons
This type of feedback results in a response being amplified or exaggerated
What organelle is the garbage disposal of the cell? (gets rid of unneeded waste)
lysosomes
What is cytokinesis?
occurs at the end of mitosis- the cleavage/separation of the cytoplasm which divides the cell into two
Does osmosis move water with or against the concentration gradient?
WITH (when solutes cannot pass, the water levels change to create equilibrium)
An atom is...
Smallest (stable) unit of matter that retains the chemical properties of that element - composed of protons, neutrons, and electrons
Is homeostasis considered a static or active process?
active
How do mitochondria create energy?
Breaking ATP into ADP and energy
What organelle has spindle fibers that come out of it to attach to the chromosomes?
centrioles (or centrosomes)
The sodium potassium exchange pump functions by what type of transport?
active
An element is...
Unique chemical substance consisting of only one type of atom