**Question:** All are elevators of larynx except:

A. Cricothyroid muscle
B. Cricothyroid membrane
C. Strap muscles (Straight and Levator muscles)
D. Hyoid muscle

**Core Concept:** Elevators of the larynx are a group of muscles that raise the larynx and increase the height of the laryngeal inlet. This is crucial for functions such as phonation, respiration, and deglutition.

**Why the Correct Answer is Right:**

D. Hyoid muscle is not an elevator of the larynx. It is a separate group of muscles that are responsible for moving the hyoid bone, not the larynx itself. The hyoid muscle primarily lifts the hyoid, which in turn raises the larynx.

**Why Each Wrong Option is Incorrect:**

A. Cricothyroid muscle is indeed an elevator of the larynx, specifically involved in raising the thyroid cartilage, which forms the base of the larynx.
B. Cricothyroid membrane is the structure between the cricoid cartilage and thyroid cartilage and does not have a direct role in laryngeal movements.
C. Strap muscles (Straight and Levator muscles) are responsible for raising the hyoid bone, not the larynx. They primarily affect the movement of the tongue and soft palate.

**Clinical Pearl / High-Yield Fact:**

The strap muscles are essential for swallowing, speech, and maintaining airway patency. However, their primary action is on the hyoid bone, not the larynx. Understanding the distinction between the actions of strap muscles, hyoid muscle, and laryngeal elevator muscles is crucial for understanding oropharyngeal and laryngeal functions.