Drug Affinity and Intrinsic Activity

Front

What is drug affinity?

Back

Drug affinity refers to the strength of the interaction between a drug and its receptor. A drug with high affinity binds more tightly to its receptor than a drug with low affinity.

Front

What is intrinsic activity in pharmacology?

Back

Intrinsic activity is the ability of a drug to activate a receptor upon binding. It determines the efficacy of the drug; a drug with high intrinsic activity fully activates the receptor, while one with low intrinsic activity does not.

Front

What is the difference between an agonist and an antagonist?

Back

An agonist is a substance that activates a receptor to produce a biological response, while an antagonist blocks or dampens the biological response by binding to the receptor without activating it.

Front

What is a partial agonist?

Back

A partial agonist is a drug that binds to a receptor and activates it, but produces a weaker response than a full agonist. It has affinity but lacks full efficacy.

Front

What role does GABA play in the central nervous system?

Back

GABA (gamma-aminobutyric acid) is the primary inhibitory neurotransmitter in the CNS, helping to reduce neuronal excitability and prevent overstimulation.

Front

What is the significance of half-life in pharmacology?

Back

Half-life is the time it takes for the concentration of a drug in the bloodstream to reduce by half. It is crucial for determining dosing schedules and understanding drug duration of action.

Front

What are the common side effects of benzodiazepines?

Back

Common side effects of benzodiazepines include drowsiness, dizziness, confusion, and impaired coordination. They can also lead to dependence and withdrawal symptoms.

Front

What is the mechanism of action of ACE inhibitors?

Back

ACE inhibitors block the angiotensin-converting enzyme, which decreases the production of angiotensin II, leading to vasodilation and reduced blood pressure.

Front

What is synaptic transmission?

Back

Synaptic transmission is the process by which signaling molecules (neurotransmitters) are released from one neuron and bind to receptors on another neuron, facilitating communication between nerve cells.

Front

What is the role of dopamine in the CNS?

Back

Dopamine is a neurotransmitter involved in reward, motivation, and motor control. It plays a key role in mood regulation and is implicated in disorders like Parkinson's disease and schizophrenia.