Chapter 1 Flashcards
(33 cards)
What are cells?
basic unit of structure and function in living things
3 laws of cell theory?
all living things are composed of cells, cells are basic unit of structure and function in living things, all cells are produced from other cells
Who discovered plants are made of cells?
Mathias Scheilden
who found out all cells come from cells
Rudolph Virchow
What did Theodor Schwann do?
all animals are made of cells
What is the difference between Leeuwenhoek and Robert Hooke
Leuwenhoek: Single-lens microscope
Hooke: Improved compound microscope
Leeuwenhoek discovered cellls of living things, Hooke did non-living
What do single cells/organisms obtain and get rid of
obtain: food water, oxygen
get rid of: Carbon dioxide, wastes, excess water
What does light microscopes do?
focus light through lenses to magnify image
What are the improvements of compound microscopes
2 or more lenses
what is the condition in which things appear larger than they are
magnification
what lens do magnifying glass use
convex lens
what are the functions of the cell wall
1.protect cell 2.material pass easily (only in plants)
Cell membrane functions
forms border between cell and environment
controls which substances pass in and out
prevents harmful materials from entering
Nucleus functions
large oval structure in cell
direct all of cells activities
what is the nuclear envelope
surrounds nucleus, controls materials that pass through PORES in and out of nucleus.
What the fuck is the chromatin
Contains information for directing a cells function
Nucleolus functions?
- Small round structure in nucleus
- The place where ribosomes are made
What are ribosomes
small grain-shaped ORGANELLES that produce proteins.
What the fuck is the cytoplasm
fills region between cell membrane and nucleus.
Clear gel-like fluid
Carry along nucleus and organelles that have specific jobs
WHAT THE FUCK ARE ORGANELLES
tiny structures within cells, carry out specific actions.. Nucleus is the largest organelle
what the fuck is the mitochondria
float in cytoplasm (rod shaped structures)
“powerhouses of a cell”
convert ENERGY stored in FOOD to energy the CELL CAN ACTUALLY USE to live and function
WHAT THE FUCK IS THE ENDOPLASMIC RETICULUM (ER)
organelle with network of membranes that produce many substances.
Ribosomes dot some parts of ER, while others float
Ribosomes functionsss? FUCKKKK
made in nucleolus
produce proteins needed by cells
how does the endoplasmic reticulum help ribosomes
1.helps ribosomes make proteins
2.newly made proteins leave ER, move to other organelles