Organelles
What is an organelle?
Little specialized organs in the cells
Define hierarchy.
To sort from largest to smallest or smallest to largest
What piece of technology helped us discover the cell?
the microscope
Define homeostasis.
Maintains balance in your cells/body
What is required to be classified as "living"?
-cells
Other acceptable answers: energy, waste excretion, reproduction, etc
What is the function of the cytoplasm?
The cytoplasm is a jelly that holds all the organelles in place.
What is tissue made up of?
Cells
How does the cell membrane maintain homeostasis?
By controlling what can go in and out of the cell it balances nutrients and waste
Name the 3 principles of the cell theory
-all living things made of one or more cells
-all cells come from preexisting cells
-cells are the basic unit of life
What two organelles are only found in plant cells?
chloroplast & cell wall
What is the smallest LIVING unit in the hierarchy
cells
What is the function of a scientific model
Models typically scale an object that is too large or too small so that we can study it up close
Daily Double: What organelles are found in both plant and animal cells (eukaryotic cells)
cell membrane, cytoplasm, nucleus, mitochondria, ribosomes, vacuoles, & lysosomes
What types of organisms are classified as eukaryotes?
plant, animal, and fungi (will accept just the first two answers)
What is contained inside of the nucleus
genetic information
What can scientists do with a well-constructed and well-tested theory?
A. turn it into a scientific law
B. change it quickly and easily
C. stop investigating and testing it
D. make predictions about future events
Theories and laws have equally valid concepts and do NOT have a hierarchy where one develops into the other
What are the 5 types of homeostasis?
reproduction, food, water, digestion/waste removal, and gas exchange
What is the main objective that all cellular processes have?
TO MAINTAIN HOMEOSTASIS (balance)
What 4 organelles are found in ALL cells?
ribosomes, cell membrane, cytoplasm, and DNA
List the 5 parts of the hierarchy of life from smallest to largest
atoms
molecules
cells
tissues
organs
organ systems
organisms
What is a theory?
Testable explanation of some aspect of the natural world, based on many facts, observations, and hypotheses that have been rigorously tested and supported by extensive evidence, rather than being a mere guess or hypothesis.
Scientific theories do not explain "what" happens (that's a scientific law) but rather "why" it happens
What level is the least specialized in the hierarchy of life?
CELL (most basic because it is the BASIC unit of life)
What are the 5 characteristics of life?
organization, growth and development, obtain and use energy, responds to stimuli, homeostasis, and reproduce (pg. 12)