Cell Theory & Discovery
This invention allowed scientist to discover cells.
What is a microscope?
The plasma membrane is made of two layers of these molecules.
What are phospholipids?
Movement of particles from high to low concentration.
What is diffusion?
Organelle known as the powerhouse of the cell.
What is mitochondria?
Microscope that uses electrons and requires dead specimens
What is an electron microscope?
Name one part of the cell theory
What is __________?
The model that describes the membrane as flexible and moving.
What is the fluid mosaic model?
Diffusion of water across a membrane.
What is osmosis?
Organelle that packages and ships proteins
What is the golgi apparatus?
Solution where water enter and leaves at the same rate.
What is an isotonic solution?
This type of cell has no nucleus or membrane-bound organelles?
What is a prokaryotic cell?
The part of the phospholipid that faces the water.
What are hydrophilic heads?
Transport that requires energy to move substances against a gradient.
What is active transport?
structure that gives plant cells rigidity and protection
What is the cell wall?
Structure that contains DNA in eukaryotic cells.
What is the nucleus?
Explain why cells were unknown before the 1600s.
Microscopes have not been invented yet
Name two components of the plasma membrane besides phospholipids.
What are proteins and cholesterol?
What happens to an animal cell in a hypotonic solution?
It swells or burst
organelle responsible for protein synthesis
What are ribosomes?
Cilia are short and numerous and flagella are long and few
Why does the statement "cells arise from pre-existing cells" disprove spontaneous generation?
What is because it shows new cells do not come from nonliving matter?
Explain how selesctively permeable helps to maintain homeostasis.
By controlling what enters and leaves the cell.
Compare passive and active transport
passive does NOT require energy and active DOES require energy.
Trace the path of proteins from DNA to release
Nucleus--> ribsomes/rough ER --> Golgi --> vesicle --> exocytosis
Describe the endosymbiotic theory