Microscopes
What part of the microscope do hold to carry it?
Arm and base
Which scientist looked at cork under a microscope and used the term cell?
Robert Hooke
Name an organelle found in plant cells but not animal cells
Cell wall, chloroplast
The smell of a cake filling a room is an example of (osmosis or diffusion?)
Diffusion
Name something you might see in a sample of pond water under the microscope.
Mayfly nymph, algae, dirt, nematode
What magnification (powers) is the objective lens on a compound microscope?
4x, 10x, 40x
Which scientist looked at gunk from his teeth under the microscope and saw bacteria?
Anton Van Leeuwenhoek
What is the function of the cell membrane?
Surrounds the cell and allows what enters and exits the cell.
True or False: Oxygen can enter a cell through diffusion
True - this is how red blood cells gain oxygen from the lungs
Explain how blood helps other organs in the body.
Delivers oxygen and nutrients to cells so that the organs can carry out their intended function (e.g. deliver oxygen to muscle cells so muscles can contract)
What are the names of the 2 lenses that magnify on a microscope?
Ocular lens (eyepiece) and objective lens.
What are the three parts of cell theory?
1. All living things are made of cells
2. Cells are the basic unit of organization and structure
3. Cells come from pre-existing cells
What is a difference in the vacuole in a plant cell versus animal cell?
Plant cells have one large vacuole that helps shape the cell, animal cell have multiple smaller vacuoles.
Explain why a slug would shrivel up if salt was poured onto it?
The salt draws water out of the cells of the slug, causing it to shrivel. There is a higher concentration of water inside the slug, water moves from the high concentration to low concentration.
What is a difference between vacuoles in plant and animal cells?
Plant: one large vacuole, stores a lot of water that helps the cell stay firm
Animal: multiple smaller vacuoles, doesn't really affect shape of cell
What part of the microscope do you place the slide on?
The stage
What instrument do scientists use to view cells?
A microscope.
The E.R. surrounds the nucleus and packages/sends proteins to other places INSIDE the cell, the G.A. packages and sends proteins both inside and OUTSIDE the cell. The G.A. is not surrounding the nucleus.
What does it mean when a cell has reached equilibrium?
The molecules have reached the same concentration on either side of the cell membrane.
Name one organelle that has a double membrane.
Chloroplast, mitochondria, nucleus
What lens (magnification) do you use to first locate a specimen?
4x (low power)
What type of electron microscope can show the surface of a cell?
Scanning electron microscope.
Name an organelle found in animal cells but not plant cells (hint - it was in the gizmo)
Centriole
Outside the cell. Water follows salt.
How many cells are in the human body?
About 37 trillion