Which of the Following Describes the Far Zone

question 1

Multiple Choice

Which of the following describes the far zone?

• A) It lies within one near zone length.
• B) It is called the Fresnel zone.
• C) Its beam width (diameter) increases with increasing depth.
• D) The length of the far zone increases with increases in frequency.

---

Definitions:

Insulin

A compound released by the pancreas that plays a key role in blood sugar regulation by supporting glucose uptake into tissues.

Membrane-bound Receptor

A type of cell receptor that is anchored in the cell membrane and interacts with extracellular molecules to trigger signals within the cell.

G Proteins

Guanine nucleotide-binding proteins that act as molecular switches inside cells, involved in transmitting signals from a variety of stimuli outside a cell to its interior.

Cyclic AMP

A secondary messenger important in many biological processes, such as the regulation of metabolism.