All Flashcards
What is the effect of increased unsaturated fatty acids on membrane fluidity?
Increases membrane fluidity due to kinks preventing tight packing.
What happens if a cell is placed in a hypertonic solution?
Water moves out of the cell, causing it to shrink.
What happens if a cell is placed in a hypotonic solution?
Water moves into the cell, causing it to swell or burst.
What is the effect of cholesterol on membrane fluidity?
Helps maintain membrane fluidity by preventing it from becoming too rigid or too fluid.
What happens when a receptor protein binds to its signaling molecule?
Initiates a cellular response.
What is the effect of the hydrophobic tails of the phospholipid bilayer on polar molecules?
They repel charged and polar molecules, hindering their passage across the membrane.
Label the phospholipid bilayer diagram: 1. Head, 2. Tail
1: Hydrophilic head, 2: Hydrophobic tail
Label the components of the membrane: 1. Phospholipid, 2. Protein
1: Phospholipid, 2: Integral protein
Identify: 1. Region that interacts with water, 2. Region that avoids water
1: Hydrophilic head region, 2: Hydrophobic tail region
Label the membrane structure: 1. Glycoprotein, 2. Phospholipid
1: Glycoprotein, 2: Phospholipid
Label the diagram of the cell membrane: 1. Integral protein, 2. Peripheral protein
1: Integral protein, 2: Peripheral protein
Define phospholipid bilayer.
A two-layered arrangement of phospholipids that form a cell membrane, with hydrophobic tails facing inward and hydrophilic heads facing outward.
What is a glycoprotein?
A protein with a carbohydrate attached, involved in cell signaling and attachment.
Define glycolipid.
A lipid with a carbohydrate attached, involved in cell signaling and attachment.
What is the fluid mosaic model?
A model describing the cell membrane as a flexible structure with a mosaic of proteins embedded within the phospholipid bilayer.
Define selective permeability.
The property of a membrane that allows some substances to cross more easily than others.
What are adhesion proteins?
Membrane proteins that form junctions between cells.
What are receptor proteins?
Membrane proteins that receive and bind to signaling molecules, initiating a cellular response.