Unit 4, Quiz 1 Flashcards
The _______________ controls what moves into and out of the cell. This is called _____________________.
- Cell membrane
- Semi-permeable
What substances can easily move in and out of the cell membrane when needed?
- Water
- Oxygen
- Carbon Dioxide
- Minerals
What is passive transport?
Passive transport is the movement of materials across the cell membrane without the help of energy
Hint: Going down a hill
Diffusion and osmosis are both examples of what?
Passive transport
Diffusion is the ____________ of molecules from a _____ concentration to a ____ concentration.
- Movement
- High
- Low
Diffusion occurs in both ____________ and ______________.
- Plants
- Animals
What is equilibrium?
Equilibrium is when particles are balanced, or evenly spread out
Do our body processes work better at cold or warm temperatures?
Warm
What is the exact temperature that is ideal for our body?
98.6 degrees fahrenheit
What is facilitated diffusion?
Hint: Facilitate means to help or assist.
Facilitated diffusion is when charged particles or larger molecules, such as glucose, move through tranport proteins (protein channels) passively
Osmosis is the __________ of ____________ through a membrane.
- Diffusion
- Water
True or false? If false, correct the statement.
Water molecules only move from a high concentration to a low concentration.
True
Why will a fresh vegetable become rubbery when placed in salt water overnight?
When you put fresh vegetables in salt water, water moves out of the vegetable cells into the saltwater, causing the cells to shrink and the vegetable to become rubbery. This is an example of osmosis and equilibrium.
What is active transport?
Active transport is when materials move across the cell membrane with the help of energy
There are pumps in the cell membrane that allow for active transport. What is an example of one?
The Sodium-Potassium pump