receptor
- Noun:
- A sensory organ or specialized cell that responds to external stimuli: A receptor is a biological structure, often part of a sensory organ like the skin, eye, or nose, that contains nerve endings capable of detecting specific types of stimulation (e.g., light, sound, pressure, chemicals) and initiating a nerve impulse.
- A molecule or site on a cell that binds to a specific substance: In biochemistry and physiology, a receptor is a protein molecule, typically embedded in a cell membrane, that recognizes and binds to a specific chemical agent (like a hormone, neurotransmitter, or drug), mediating a physiological response within the cell or tissue.
Noun (Sensory Organ):
- The taste receptors on the tongue allow us to perceive different flavors.
- When light hits the photoreceptors in the retina, a signal is sent to the brain.
Noun (Cellular Structure):
- The drug works by blocking the receptor for the stress hormone.
- Insulin binds to its receptor on the cell surface to allow glucose uptake.
"Receptor site": The specific region on a receptor molecule where a ligand (e.g., a drug or hormone) binds.
- The virus enters the cell by attaching to a specific receptor site.
"Receptor-mediated endocytosis": A cellular process where specific molecules are ingested by the cell after binding to receptors on its surface.
- Cholesterol is taken into cells via receptor-mediated endocytosis.
Sensory receptor (n): A specific type of receptor responsible for detecting sensory stimuli from the environment or the body.
- Pain is detected by specialized sensory receptors called nociceptors.
Neurotransmitter receptor (n): A receptor on a neuron that binds a neurotransmitter released from another neuron.
- Dopamine receptors are a key focus in Parkinson's disease research.
Receptive (adj): Related to the ability to receive or respond to stimuli or impressions.
- The patient's muscles were not receptive to the nerve signals.
- Sensor: A device or biological structure that detects or measures a physical property. (More common for artificial devices, but conceptually similar).
- Binding site: A specific location where another molecule attaches, often used interchangeably in molecular biology contexts.
Receptor antagonist: A drug or molecule that blocks a receptor, preventing its normal activation.
- Beta-blockers are receptor antagonists used to treat high blood pressure.
Receptor agonist: A drug or molecule that activates a receptor, mimicking the action of the natural substance.
- Morphine is an agonist for opioid receptors in the brain.
(Note: As a technical scientific term, "receptor" is not commonly used in idiomatic expressions. Its usage is primarily literal and academic.)
-
an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation
-
a cellular structure that is postulated to exist in order to mediate between a chemical agent that acts on nervous tissue and the physiological response
Khám phá thêm
Các từ liên quan
Từ đồng nghĩa
Từ trái nghĩa
Từ chứa "receptor"
Từ có nhắc đến "receptor"
