Grade 9 Unit 2 Flashcards
Who discovered the first light microscope
Anton van leewenhoek
What is the measure of how much detail a microscope can show
Resolving power
What is the technique of preparing object or specimen to be seen under microscope
Mounting
Environmental change that makes an organism respond
Stimuli
Reaction of an organism to stimuli
Response
What is z genetic material which contain instruction for making an organism
Chromosomes
What is also known as lipo protein layer
Cell membrane
Network of internal membranes extending thru cytoplasm
ER
What is ribosome composed of
RNA n proteins
What r 3 parts of plastids
Leucoplast, chromoplast, chloroplast
What is the living part of cell consisting of cytoplasmic structures n nucleus
Protoplasm
Component of bacterial cell wall
Murein
T / F
Using a light microscope takes skill and practice
T
T/F
specimens are always fixed with electron microscope
T
light microscopes only living/non-living materials need fixation
non-living
links the nucleus of a cell with the cell membrane
endoplasmic reticulum
Which organelles cannot be seen easily with a light microscope
Mitochondria, endoplasmic reticulum and ribosome
cells adapted to carry out a particular bodily function
specialised cells
cells cells that have not yet assumed their final functional characteristics
undifferentiated cells
cells from the early embryo that have the potential to form almost any other type of cell
embryonic stem cells
cells arranged in one or more layers to form part of a covering or lining of a body surface
epithelial cells
short, arm-like protuberances of a nerve cell
dendrites
extension of a neuron that transmits messages
axon
elongated contractile cells that form muscle
muscle cells
strands of protein that enable muscles to contract
muscle fibres
A system that shows or measures osmosis is an
osmometer
The rate of active transport depends on the rate of …..
respiration
T/F
Both osmosis and diffusion can be demonstrated experimentally in the laboratory
T
how much detail the microscope is able to show
resolving power
most common type of electron micrograph you will see is produced by
transmission electron microscope
For ……. microscopes only non-living materials need fixation, while living materials are not fixed
light
T/F
Specimens are always fixed with electron microscopes
T
Animals move using ….., plants move more slowly using ……
muscles, growth
is vital to the long-term survival of any type of living organism.
Reproduction
contains the instructions for making new cells or new organisms in the form of long threads known as chromosomes.
nucleus
is a three-dimensional system of tubules that spreads right through the cytoplasm.
endoplasmic reticulum
a protein designed to control the rate of a very specific reaction and ensure that it takes place without becoming mixed up with any other reaction
enzyme
is a space in the cytoplasm filled with cell sap, a liquid containing sugars, mineral ions and other chemicals dissolved in water.
vacuole
a fluid-filled cavity inside a cell
vacuole
cells that are stained …….. make hormones that help to control the sugar levels in the blood
pink
cells that are stained ….. make enzymes needed to digest the food in the gut
red
T/F
Diffusion is a relatively slow process
T
amount remaining after certain adjustments have been made
net
