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Cells

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lunifer's version from 2018-04-19 18:01

Notes

animal cell diagram: Animal Cell Diagram
plant cell diagram: Plant Cell Diagram

Characteristics of Living Things

Question Answer
what mnemonic device do we use to remember characteristics of living things?MRS GREN
movementplants and animals move (plants open/close petals, animals walk around)
respirationbreathing, animals breathe in oxygen and breathe out carbon dioxide, plants do the opposite, etc
sensitivityplants are sensitive to light and gravity, animals are sensitive to many things such as light and sound
growthbruh
reproductionplants and animals can make more of themselves
excretionall living things give off waste, such as moisture or poopy
nutritionanimals need to eat food, plants can make their own food, we all gotta eat
memorize

Cells

Question Answer
what are cells?cells are the basic units of structure and function in all living things
what is cell theory?cell theory refers to the idea that cells are the basic unit of structure in every living thing
what is the 1st principle of cell theory?all living things are composed of one or more cells
what is the 2nd principle of cell theory?the cell is the most basic unit of life
what is the 3rd principle of cell theory?all cells come from pre-existing cells
what are organelles?organelles are parts of a cell that have a specific function (comparable to organs in a body)
what would happen if you were only made of one cell?you would only be able to grow to a certain size, you wouldn't have a nervous system or muscles for movement
how many cells do humans have?about 100 trillion
humans may have _______ of types of cellshundreds
all cells share something in common, which issome type of membrane
viruses are not ______living
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Organelles and Such

try the matching mode with this one before flashcard.
Question Answer
what does the nucleus look like?a dark sphere found near the centre of the cell
what does the nucleus do?controls the cell, contains DNA
what does the cell wall look like?a thick, rigid layer that surrounds the cell (plant cells alone)
what does the cell wall do?make the cell very strong, support + shape
what does the cell membrane look like?a thin flexible layer that surrounds a plant or animal cell
what does the cell membrane do?allows nutrients to enter the cell, allow waste particles to exit the cell
what does the cytoplasm look like?a liquid inside the cell
what does the cytoplasm do?delivers oxygen or carbon dioxide and food to all cell parts, site of chemical reactions
what does the vacuole look like?a container filled with water, bigger in plant cells
what does the vacuole do?holds water and nutrients
what does the endoplasmic reticulum look like?a container with many exterior folds, rough = ribosomes, smooth = no ribosomes
what does the endoplasmic reticulum do?makes nutrients and breaks down waste
what does the mitochondria look like?a container with many inner folds
what does the mitochondria do?makes energy for the cell
what does the chloroplast look like?an oval shaped container with many interior containers
what does the chloroplast do?uses sunlight to make food, contains chlorophyll for photosynthesis
what does the golgi apparatus look like?organelle with a system of flattened tubular membranes
what does the golgi apparatus do?modifies proteins and sends them to their appropriate destinations
what do lysosomes look like?organelles that contain digestive enzyme, single membrane
whay do lysosomes do?digest excess or worn out organelles, food particles and engulf virus or bacteria
what do ribosomes look like?non membrane bound organelles
what do ribosomes do?they are where enzymes and other proteins are assembled
memorize

Electron Microscope

Question Answer
what is an electron microscope?an electron microscope is a type of microscope that uses a particle beam of electrons to illuminate a specimen and create a highly magnified image
what magnification can electron microscopes obtain?electron microscopes can a high magnification up to 100 million
list some things that electron microscopes are used to investigatemicroorganisms, cells, molecules, biopsy samples, metals, crystal
samples for an electron microscope must be ______dead
electron microscopes are _______ to build and maintainexpensive
electron microscope specimens usually have to be viewed in a _______vacuum
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