Cells Flashcards
what’s the eyepiece?
contains lens that magnifies
what’s the coarse adjustment knob?
moves stage up or down to focus image
fine adjustment knob?
brings object to sharper focus
revolving nosepiece?
holds three objective lenses
objective lenses?
provides different strengths of magnification (10,100,1000)
stage?
supports slide and holds object wanting to view.
stage clips?
holds slide firmly on stage
diaphragm?
different sized holes that let different amounts of light pass through object of view
lamp?
supplies light through object in view
arm?
allows to carry microscope securely
base?
foundation for microscope
what is fibre optics?
technology that surgeons use to view inside and outside the body
what is a cell?
smallest known unit of life
which is correct;
- organs, cells, tissue, organ system?
- cells, organs, tissue, organ system?
- cells, tissue, organ, organ system?
- organ system, organ, cell, tissue?
3 - cell, tissue, organ, organ system
what part of the cell is the thin line that surrounds the cell?
cell membrane
what is the rigid frame-like covering the outside part of the cell?
cell wall - only plants have it.
what is the cytoplasm?
liquid in the cell, grainy-looking bits.
what is the control centre of the cell?
the nucleus.
what is a vacuole?
clear-liquid space. collects waste
what is known as the powerhouse of the cell?
mitochondria
what creates photosynthesis?
chloroplasts - only in plants
what is the purpose of a Golgi body and how do you identify it?
it is essential to life and it is string-like
what is the er? endoplasmic reticulum
it attaches to the nucleus to transport thing in and out of the nucleus.
what digests the unwanted things of the cell?
lysosomes
what is the purpose of the ribosomes?
make proteins for the cell.
what are the two organelles that the animal cell does not have?
cell wall
chloroplasts
what’s the difference in shape of the two cells?
animal is loose and circular and plant is square
why is the plant cell square?
the rigid form of the cell wall.
what is the smallest kind of organism known to man?
mycoplasma
what is a unicellular organism?
made up of only one kind of cell.
what is a multicellular organism?
organisms are made up of two or more cells.
what is the name of the largest unicellular organism on earth?
the acetabularia
what is diffusion?
movement of particles from and area of low concentration to an area of high concentration.
what’s the difference between osmosis and diffusion?
osmosis is the diffusion of water, while diffusion is anything.
what is selectively permeable?
only certain things can go through
what’s a compound light microscope?
a microscope that has two or more lenses as a light source
