Biology, Cells, Q1

organismal theory

a functioning organism represents life

electron microscope

a microscope that focuses a stream of electrons to magnify objects

as it occurs in a microscope 2nd

body tube

the cellular material outside the nucleus is called

cytoplasm

Schleiden and Schwann

developed the cell theory

the Bible states that man was created in the image of God and is therefore

far more than just a collection of cells that make up his body

ocular lens

lens found in the eyepiece

the spherical object within a cell which controls its activity is called the

nucleus

as it occurs in a microscope 4th

objective lens

as it occurs in a microscope 1st

ocular lens

one difference between human cheek cells and onion cells

the absence of a cell wall in human cells

nucleus

Control center of the cell

vacuole

A large sac-like storage area in a cell

optical microscope

A microscope that uses visible light and lenses to magnify objects.

resolving power

ability to tell two points apart

cytoplasm

all cellular material outside the nucleus

plasma membrane

Controls what enters and leaves the cell

Max Knott and Ernst Ruska

Germans who invented the electron microscope in the 1930's

the Organismal Theory states

the organism is the basic unit of life

life cannot be completely defined by

the physical sciences

binocular

two eyepieces

ESSAY explain three disadvantages to using an electron microscope to view microorganisms

very expensive, extensive and time consuming specimen preparation, and you can not view a living organism.

Charles Spencer

an American who was able to significantly improve the quality of the magnified images with his microscopes

epidermis

an outer covering of cells

as it occurs in a microscope 5th

coverslip

cell theory

each cell possesses a life of its own

Galileo used mathematics to

examine the principles of lenses, thus improving on previous attempts at magnification

Anton van Leeuwenhoek

first to carefully document observations of blood cells, sperm cells, and other microorganisms

Robert Hooke

first to observe "small chambers" in cork and call them cells.

organism

functional plant or animal

ESSAY what safety measures should you take to avoid damaging the microscope, microscope slide, or a living specimen on your microscope stage

look at the specimen from the side, not through the eyepiece when you are turning the low power objective as close as possible to the specimen to begin your observations. never use the coarse adjustment knob while using the high power objective. never turn the fine adjustment knob more than a fourth turn to adjust the focus while using the high power objective.

objective lens

magnifying lens closest to the specimen

the Bible teaches that

our bodies were created, then had life breathed into them

cell wall

outer covering around plant cell made of fibrous material

as it occurs in a microscope 3rd

revolving nosepiece

monocular

single body tube

Hans and Zaccharias Janssen

sixteenth century eyeglass makers, experimented with glass lenses and a tube and found that object could be magnified greatly

nucleolus

small structures within nucleus

Cell theory states

the cell is the basic unit of life