Flashcards in Chapter 8 Deck (39):
What is the solute?
Substance that is dissolved
What is the solvent?
Substance that does the dissolving
A difference in concentration is called...
Which form of diffusion requires channel or carrier proteins?
Which direction do particles move during diffusion
Down concentration gradient; high to low
True or false?
Passive transport requires energy from the cell
True or false?
Osmosis is an example of passive transport?
What type of environment has a higher concentration than the cell?
Which direction will water flow in an isotonic solution?
In and out of cell
Which type of has a lower concentration than the cell?
What happens to cells in hypotonic solutions?
What is it called when cells shrink as a result of osmosis
The effect of a hypotonic solution on a cell?
The name for the 2 layer structure?
Direction water flows in isotonic?
In and out
This type f protein identifies cells
Cell surface markers
Chemical signal produced by cells and transported by the blood
Ion can be moved against the concentration gradient by these
What is diffusion?
The movement of substances down a concentration gradient
Molecule that helps stabilize phosolipida
2 ways send signals through body
Nerves and chemicals
Type of protein is attached to the inside or outside of the membrane
Protein that helps start chemical reactions in the cell
What is equilibrium?
When the space is filled evenly
High to low
Needs energy (ATP)
Low to high
Transport substances that fit within their binding site
Ions, sugars, and amino acids diffuse through...
Diffusion of water across a selectively permeable membrane
Movement of a large substance into a cell by a vesicle
Movement of material out of a cell by a vesicle
Diffusion directly through the membrane
Diffusion with carrier and channel proteins
Response to specific signals is made possible by...
Acts as a signal molecule within the cell; causes charges in the cytoplasm and nucleus
A cell may respond to a signal by...
1. Changing its membrane permeability
2. Activating enzymes
3. Forming a second messenger