Energy and Cell Communication

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KEY:

Energy and Cell Communication

Present in a target cell that receives the signal molecule

Intracellular Receptors

Steroid Hormones

The Steroid hormone aldosterone passes through the plasma membrane

Aldosterone binds to a receptor protein in the cytoplasm activating it

Hydrophobic is a nonpolar signal molecule

Diffuse directly across the lipid bilayer of the plasma membrane to encounter its receptor in the cytoplasm

Nucleus

Cytoplasm

Receptors is inside the cell

Membrane Receptors

Plasma Membrane

signal molecules are received at surface by membrane receptors

Second Messenger

Hydrophilic is a polar, charged and/or large signal molecule

Diffuse through the plasma membrane. It's receptor is embedded in the membrane

First Messenger

3 Types of Membrane Receptors

Ion Channel Receptor

Allows direct conversion of a chemical neurotransmitter message to an electrical current.

G-Protein Link Receptor

Convert extracellular signals into intracellular responses

Tyrosine Kinase Receptor

Promotes the growth and survival of cells in animal cells