Arrange the Following Events in Proper Sequence

question 67

Multiple Choice

Arrange the following events in proper sequence:
(1) The activating hormone interacts with a membrane-bound receptor.
(2) Cyclic AMP causes the cell to carry out a function characteristic for that specific hormone.
(3) Adenylyl cyclase catalyzes the transformation of ATP to cyclic AMP.
(4) Adenylyl cyclase is activated.

• A) 1, 2, 3, 4
• B) 1, 4, 3, 2
• C) 3, 4, 2, 1
• D) 1, 3, 2, 4
• E) 1, 3, 4, 2

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Definitions:

Axon Terminal

The endpoint of an axon where neurotransmitters are released to communicate with other neurons or muscles.

Dendritic Spine

Protrusion that greatly increases the dendrite’s surface area; typical point of dendritic contact with the axons of other cells.

Postsynaptic Membrane

A specialized area of a neuron's cell membrane that receives neurotransmitters from another neuron at a synapse.

Electrical Synapses

Rapid, bidirectional connections between neurons mediated through gap junctions, allowing direct transmission of electrical signals.