Diffusion
In diffusion, molecules always move from _____ to _______ concentration.
What is Higher to Lower?
Transport is defined as when a substance is moved over this.
What is a membrane?
The term hypertonic is used to describe a cell that experiences a change of water retention, with the most water ending up on the ______ of the cell.
What is outside?
List at least three structures in Eukaryotic cells that are surround by a membrane.
Answer: The cell itself (plasma membrane)
Mitochondria
Chloroplast
ER
Golgi
Nucleus
Vesicle
Lysosome
Which organelle is responsible for packaging and shipping proteins to transport to the nucleus?
What is the Golgi Apparatus?
True or False
The diffusion of molecules from higher to lower concentration requires an input of energy
What is False?
When a molecule moves through a membrane without requiring energy, the process is called ____________ ____________.
What is Passive Transport?
The term that describes when both sides of the membrane have equal concentrations of dissolved solutes.
What is isotonic?
The function of the cell membrane is to _____________.
What is allow things to enter and exit the cell and maintain homeostasis?
Name three organelles that plant cells have that animal cells do not.
What are the Cell Wall, Chloroplast, and a large central vacuole?
This term describes when a substance is evenly spread out in its container
What is equilibrium?
When a substance is moved into the cell by way of transport vesicles, the process is called ____________
What is Endocytosis?
After eating a meal, the outside of your cells are hypertonic to the inside of your cells. The outside of the cell would have the _____ level of concentration.
What is Higher?
The tunnel in which larger molecules must travel through in a cell membrane is known as a ___________.
What is a protein channel?
What organelle controls all of the cell’s activities?
What is the Nucleus?
This type of diffusion describes the movement of molecules through a protein channel.
What is Facilitated Diffusion?
Sodium ions are always in higher concentration on the outside of our cells, and continuously move into our cells. The cell, however, wants a lower concentration of sodium inside the cell, and pumps the sodium from LOWER to HIGHER concentration, out of the cell. This is called ___
What is Active Transport?
A few years ago, a woman died trying to win a NINTENDO Wii by drinking a gallon of water without urinating. Explain what happened to her cells using the term HYPOTONIC.
So much water flooded her system causing a very hypotonic environment and her cells (brain cells, blood cells) which caused her water to rapidly diffuse and they burst.
Which two elements/molecules can travel through the cell membrane via diffusion (which are the two smallest molecules that we have discussed?)
What are Oxygen and Carbon?
This organelle is responsible for making proteins. They can float freely or be attached to the Endoplasmic Reticulum.
What are Ribosomes?
Answers may vary; Food coloring spreads into water, perfume spreads out in a room, oxygen spreading out in a room.
1. A chlorine ion
2. A molecule of Oxygen (O2)
3. A molecule of Water (H2O)
1. Facilitated Diffusion
2. Simple Diffusion
3. Facilitated Diffusion
When our fingers prune in water, it is actually because water is moving INTO our skin, causing the skin to swell and wrinkle. Would you prune faster in the ocean, or a freshwater lake? Explain your answer for credit.
A lake; the freshwater is more hypotonic relative to your skin cells’ and would cause water to move into your cells more quickly.
How is the cell membrane like a door, both in structure and function.
In structure, both the cell membrane and door have a sturdy structure but to some molecules (objects) can be semi-permeable. In terms of function, they both allow things to enter and leave.
Name potentially two organelles that may only be found in animal cells and not in plant cells.
What are Lysosomes and Centrioles?