Cell Membrane
The cell membrane is made of a double layer of these molecules.
What are phospholipids?
Transport that does NOT require energy.
What is passive transport?
The diffusion of this substance across a membrane.
What is water?
A process that helps maintain homeostasis by reversing a change.
What is negative feedback?
The scale used to measure acidity and basicity.
What is the pH scale?
The water-loving part of a phospholipid.
What is the phosphate (polar) head?
Movement from high concentration to low concentration.
What is diffusion?
A solution where the cell shrinks.
What is hypertonic?
Body temperature regulation is an example of this type of feedback.
What is negative feedback?
A pH of 7 is considered this.
What is neutral?
This term means the membrane allows some substances in but not others.
What is selectively permeable?
Diffusion that requires a protein channel.
What is facilitated diffusion?
A solution where the cell swells.
What is hypotonic?
This type of feedback increases or amplifies a change.
What is positive feedback?
A pH below 7 is considered this.
What is acidic?
Pick Me!!!
Free points
Movement from low to high concentration.
What is active transport?
A solution where water moves equally in both directions.
What is isotonic?
Childbirth contractions are an example of this type of feedback.
What is positive feedback?
Buffers help maintain this in the body.
What is stable pH (homeostasis)?
These membrane structures help move large or charged molecules across the membrane.
What are transport proteins?
This type of transport uses ATP to move sodium and potassium ions.
What is the sodium-potassium pump?
Pick Me !!!!
Free points
In a feedback loop, this detects changes and sends information to the control center.
What is the receptor (sensor)?
Normal human blood pH is approximately this value.
What is 7.4?