Pharmacology Which of the following is NOT true about adrenergic receptors A α1 receptors are usually presynaptic B β1 receptors are predominantly found in heart C Noradrenaline stimulates β1 receptors D α2 receptor stimulation inhibits transmitter release 💡 Explanation Which of the following is NOT true about adrenergic receptors ✓ Correct Answer: A. α1 receptors are usually presynaptic