We Maintain What?
In the morning it's 50 degrees, while in the afternoon it's 70 while our bodies are always at 98.6. It helps maintain stability in living organisms.
What is Homeostasis?
What type of pressure in plants help them maintain their rigidity and helps push the membrane against the cell wall?
Turgor Pressure
What has a hydrophilic head, and a hydrophobic tail?
Phospholipids
Going from a high concentration to a low concentration
what is diffusion
What is one type of Active Transport?
Bulk transport and Pumps
Name one way humans maintain homeostasis?
Answers will vary.
-urine is yellow
-sweating
-etc
A perfect environment for a plant.
MC- 1. Hypotonic 2. Hypertonic 3. Isotonic
1
How are the phospholipids positioned in this bilayer
tails in, heads out
There are three types of diffusion. name one
Facilitated, Osmosis, or Simple
Endocytosis or Exocytosis. When the molecule enters the plasma membrane into the cell through bulk transport.
Endocytosis
Along or Against the Concentration Gradient, what happens when the gradient disappears? What have we reached?
it means that equilibrium has been reached.
Finish the sentence:
Oh no we forgot to water the plants, they're not dead. They're just.....
Plasmolysed
True or false, the two sides of the membrane are identical
false
going from a low concentration to a high concentration
what is active transport
Phagocytosis
Should my protein solution diffuse across my dialysis membrane that has a molecular weight cutoff of 100,000 daltons? Why?
no, proteins are bigger and weigh more so it can't fit through
Paramecium is a single celled organism that contains the large contractile vacuole which helps it control osmotic pressure. How do you think it helps when Paramecium is placed in a hypotonic solution.
It maintains the turgor pressure by absorbing excess water.
A quality that allows things to go through and out of the phospholipid bilayer
What is being Semi-Permeable, Selectively-Permeable
Facilitated Diffusion needs something that Simple diffusion doesn't
Transporters.
What is the main biomolecule that is used in pumps?
Proteins
I ran an experiment with a dialysis tubing bag that contained a protein solution and a chemical called protease that has a low pH and is found in the stomach and then placed the bag into a beaker containing distilled water. How is it possible that my beaker's distilled water now has traces of amino acids?
the protease, an enzyme, broke the proteins down into amino acids allowing for it diffuse through the semipermeable membrane.
A farmer puts too much fertilizer (phosphate, potash) on his plants and after a few weeks, they all wilt away and are dead. Instead of removing the fertilizer, what could have the farmer done? State the type of reaction the plants are currently in to receive full credit.
Add more water. Hypertonic.
A model that states that the proteins in the cell membrane form a pattern and are always moving
what is the Fluid-Mosaic Model
Name 5 factors that determine the rate something is able to be diffused
- Polarity, size, temperature, pressure, solubility, permeability of the membrane, more
When this pump is hydrolyzed with ATP it changes shape and combines with Sodium and Potassium ions then allows for them to pass through the plasma membrane.
The Sodium Potassium Pump