Workshop Notes: Cell Membrane of an Axon

Front

What is the structure shown in the diagram?

Back

Phospholipid Bilayer

Front

Action potentials run along the ______ from ______ to ________.

Back

dendrites, axon, axon terminals

Front

Fill in the blank: The polar head group of the phospholipid bilayer is _________.

Back

hydrophilic.

Front

An action potential involves the flow of ______ and potassium across the membrane.

Back

sodium

Front

Movement of ions AGAINST their concentration gradient requires...

Back

Energy

Front

What is the primary function of the cell membrane?

Back

To protect the cell and regulate what enters and exits.

Front

Define 'axon'.

Back

A long, slender projection of a neuron that conducts electrical impulses away from the neuron's cell body.

Front

What is the role of sodium ions in action potentials?

Back

Sodium ions rush into the neuron, causing depolarization.

Front

What does 'hydrophobic' mean in the context of phospholipids?

Back

Hydrophobic refers to the 'tail' of phospholipids that repels water.

Front

What is the significance of the phospholipid bilayer in cell membranes?

Back

It creates a semi-permeable barrier that separates the interior of the cell from the external environment.