Which type of receptors for the neurotransmitter acetylcholine are found in the sarcolemma at a neuromuscular junction?

Identify the receptor type at the neuromuscular junction: Nicotinic receptors are ionotropic receptors that directly mediate the opening of ion channels, allowing ions like Na⁺ and K⁺ to flow across the membrane. This leads to depolarization and muscle contraction.

Differentiate from other receptor types: Muscarinic receptors are metabotropic and are typically found in other tissues, such as the heart or glands, where they mediate slower, more prolonged responses. Adrenergic receptors respond to adrenaline/noradrenaline, not acetylcholine. GABA receptors are involved in inhibitory neurotransmission and are unrelated to acetylcholine.