Introduction To Cells
What instrument allowed scientists to discover cells?
Microscope
What organelle stores materials inside the cell?
Vaculoe
Movement of water across a membrane is called what?
Osmosis
What is the correct order?
(Cell → Tissue → Organ → Organ System)
What organelle would be abundant in pancreas cells that produce enzymes?
Ribosomes
What are the basic units of structure and function in living things?
Cells
What organelle makes proteins?
Ribosome
Movement from high to low concentration is called what?
Diffusion
What process keeps internal conditions stable?
Homeostasis
If a cell doubles every hour and starts with 4 cells, how many cells will there be after 5 hours? (
128 cells
What type of cell does NOT have a nucleus?
Prokaryotic
Which structures are found in plant cells but not animal cells?
Cell wall and chloroplasts.
Which transport requires energy?
Active Transport
What must a cell have to respond to a chemical signal?
Receptor
What type of solution causes red blood cells to burst?
Hypotonic
What are the 3 parts of cell theory?
(All living things are made of cells; cells are the basic units of life; cells come from existing cells)
What organelle packages and modifies proteins?
Golgi apparatus
What are examples of active transport?
Endocytosis and Exocytosis
What level of organization is the brain?
Organ
Why are chloroplasts least useful in a model of animal protein synthesis?
Animal cells do not have chloroplasts
A scientist needs to observe living cells moving and dividing in real time. Should they use a light microscope or an electron microscope, and why?
A light microscope, because it can observe living cells, whereas electron microscopes require dead samples in a vacuum.
What part of the cell contains DNA instructions inside eukaryotic cells?
Nucleus
In a hypotonic solution, what happens to animal cells?
Water enters the cell, causing the cell to swell up and burst.
What do single-celled organisms like E. coli and amoebas have in common?
They reproduce and maintain homeostasis.
Explain why the hydrophilic heads of the membrane face outward
They interact with the watery environment inside and outside the cell.