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Chapter 7 Bio
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Who was the first person to observe and identify a cell?
Robert Hooke
Which two people invented the first microscope?
Hans and Zacharias Janssen
Name the 3 types of electron microscopes?
TEM (transmission electron)
SEM (scanning electron)
STM (scanning tunneling)
cells that do not have a membrane enclosing their DNA
prokaryotes
Cells that have a nucleus and other membrane-bound organelles
Eukaryotes
Name examples of eukaryotes
Protists, Fungi, Plants, and Animals have eukaryotic cells
what 2 structures in a cell produce energy?
mitochondria & chloroplast
how do we know plant cells are eukaryotic?
eukaryotic cells have organelles and membrane bound DNA and so do plants
all cells have ____ which ____
plasma membrane
controls what enters and exits the cell
all cells have ______ that make ____
ribosomes
protein
the living jelly-like material outside the nucleus
cytoplasm
Name the 2 types of genetic material.
DNA & RNA
eukaryotic cells evolved from
prokaryotic cells
what is the cell membrane composed of ?
phospholipid bilayer
define selectively permeable
property of the plasma membrane that allows it to control movement of substances into or out of the cell
which part of a cell produces ribosomes?
nucleolous
which part of a cell create structure?
cytoskeleton, cell wall, and central vacuole
what structure can only be found in a plant cell
chloroplast
which part of a cell stores water?
vacuole
the movement of a substance from a higher concentration to a lower concentration
diffusion
diffusion occurs until
dynamic equilibrium is reached
diffusion can be effect by
temperature
the heat makes diffusion ___
faster
diffusion of water
osmosis
three ways osmosis occurs
hypotonic
isotonic
hypertonic
hypotonic=
swells up
hypertonic=
gets smaller
isotonic=
stays the same
isotonic means
equal
when a substance must move from an area of lower concentration to an area of higher concentration
active transport
energy is requires to
move the substance through a carrier proteins
an example of an active transport is a
sodium potassium pump
transport protein=
moves things inside and outside of the cell
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Author
emilyyx14
ID
58233
Card Set
Chapter 7 Bio
Description
Bio
Updated
2011-01-05T20:33:16Z
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