Active transport
Name one place active transport is important in animals.
In animals, active transport is required for the absorption of glucose
Passive transport is called "passive" because it occurs WITHOUT
Energy
What makes osmosis different than other types of diffusion?
osmosis moves water (solvent) across the cell membrane; other types of diffusion move the solute
What is a cell membrane
A cell structure that controls which substances can enter or leave the cell.
What biomolecule do enzymes belong to?
proteins
Name one place active transport is important in plants.
In plants active transport is required for the uptake of mineral ions into root hair cells
What is passive transport
Movement of molecules without energy.
What is osmosis?
The movement of water across a semi - permeable mebrane
how does a cell membrane work to maintain homeostasis
Cell membrane plays an important role in maintaining the homeostasis by controlling the substances that penetrate the cell, either entering the cell, or leaving the cell. Since the cell membrane is a phospholipid bilayer, it can control the transition of water and ions
Which biomolecule is found in pasta and bread?
carbohydrates
How do cells release the energy required for active transport.
As the ions move back down their gradients.
What are three examples of passive transport
diffusion, osmosis, facilitated diffusion
What particles can go across the cell using osmosis?
Water (H2O) particles
phospholipids role in cell membrane
Phospholipids form the basic structure of a cell membrane, called the lipid bilayer. Scattered in the lipid bilayer are cholesterol molecules, which help to keep the membrane fluid consistent. Membrane proteins are important for transporting substances across the cell membrane.
Which biomolecule is found in fats, oils, and waxes and is a source of long-term energy?
Lipids
What is one way villi are adapted for active transport.
The villi in the small intestine provide a large surface area with an extensive network of blood capillaries.
How do the molecules move during diffusion.
Move from areas of higher concentration to areas of lower concentration
What are the three directions that water can move in and out of cell membrane?
Out of the cell, Into the Cell, and In + Out of the cell (if in equilibrium) at the same time
proteins role in cell membrane
Peripheral proteins can be found on either side of the lipid bilayer: inside the cell or outside the cell. Membrane proteins can function as enzymes to speed up chemical reactions, act as receptors for specific molecules, or transport materials across the cell membrane.
What is the function of a nucleic acid?
storage and expression of genomic information
Why are nitrate ions transported from the soil into the root hair cell by active transport and not by diffusion.
The ions must be transported against the concentration gradient.
What is needed for facilitated diffusion to take place?
transport proteins
What does the movement of water depend on?
Depends on the solution it is in
carbohydrates role in cell membrane
identification
Which biomolecule helps form muscles?
Proteins