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

---

Definitions:

Book Lungs

Respiration organs found in arachnids, such as spiders and scorpions, consisting of stacked plates resembling the pages of a book.

Parabronchi

Tubular structures in the lungs of birds that permit air to pass through the lungs in one direction, facilitating efficient gas exchange.

Desiccation

The process of drying out or dehydrating, often leading to extreme dryness.

Metabolic Cost

The energy expenditure required to maintain bodily functions and activities, including growth, reproduction, and survival mechanisms.