cells big test Flashcards
What is another name Hooke gave
for cells?
it is called “small rooms” and “cells”
What is a microscope with two
lenses called?
a compound microscope
Describe a convex lens.
- it has a center thicker than that is the thicker than the edge
- when light passes through a convex lens and into your eye, the image you see is magnified
What cell parts do plant cells have
that animal cells do not have? What
are their functions?
chloroplasts- makes food for plant cells using energy from sunlight
cell wall- supports and protects
What is the major difference
between a compound microscope and an
electron microscope?
compound microscope- uses two lenses at once and light
electron microscope- uses a beam of electrons
A microscope makes close objects
look?
bigger
What are some functions of a cell
wall?
A plant’s cell wall helps protect and support the cell
What are the 3 parts of the Cell
Theory?
- living things are composed of cells
- cells are the basic units of structure and function in living things
- all cells are produced from other cells
How do you find the total
magnification
Of a microscope?
first you multiply the eyepiece times the nosepiece and then your answer is the eyepiece times the nosepiece with a x after it
What is the nucleus’ function?
the nucleus acts as a cell’s control center, directing all of the cells activities
What is resolution?
It is the degree to which two separate structures that are close together can be distinguished, better resolution shows more detail
What are the basic units of function and
structure in living things?
cells
What is the function of a cell
membrane?
a cell membrane controls which substances pass into and out of a cell
What are the three ways cells are
organized in a multicellular
organism?
tissue, organs, organ system
an organism’s functions are the processes that enable it to live, grow, and reproduce, those functions include _________ ____________, ________, __________, and _________ ____ ____ _________.
- obtaining oxygen
- food
- water
- getting rid of wastes