Multiple choice

The secretion of non-adrenalin into the synaptic cleft occurs by which of the following processes?

  1. Active transport

  2. Endocytosis

  3. Exocytosis

  4. Pinocytosis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Neurotransmitters like noradrenaline are released from synaptic vesicles into the synaptic cleft through exocytosis: the vesicle membrane fuses with the presynaptic membrane and dumps contents. Endocytosis brings materials IN, pinocytosis is fluid uptake, and active transport moves individual molecules.

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