RECEPTOR TYPES Flashcards
What is a receptor?
A receptor is a protein molecule that receives and responds to chemical signals from outside a cell.
True or False: Receptors are only found on the surface of cells.
False
Fill in the blank: Receptors can be classified into two main types: _____ and _____ receptors.
intracellular, membrane
What type of receptor binds to ligands that can cross the cell membrane?
Intracellular receptors
Which type of receptor is typically involved in rapid signaling processes?
Membrane receptors
Name one example of a membrane receptor.
G-protein coupled receptors (GPCRs)
What is the function of G-protein coupled receptors?
They transmit signals from outside the cell to the inside by activating G-proteins.
True or False: Ion channel receptors allow ions to flow across membranes when activated.
True
What is the role of receptor tyrosine kinases?
They are involved in cell signaling and can activate various cellular pathways upon ligand binding.
Multiple Choice: Which of the following is NOT a type of receptor? A) Ion channel B) G-protein coupled C) Ligand-independent D) Receptor tyrosine kinase
C) Ligand-independent
Fill in the blank: Nuclear receptors primarily regulate _____ expression.
gene
What type of signaling do cytokine receptors typically mediate?
Immune signaling
True or False: Receptors can only bind to one specific ligand.
False
Name the receptor type that responds to light stimuli.
Photoreceptors
What is the primary function of taste receptors?
To detect chemical substances in food and beverages.
