Final answer:
The two critical effects created by intrinsic laryngeal muscles are vocal fold closure and tension. These actions are essential for the production of sound during speech and singing. These muscles are responsible for controlling the movement and position of the vocal folds in the larynx.
Step-by-step explanation:
The two critical effects created by intrinsic laryngeal muscles are vocal fold closure and tension. These muscles are responsible for controlling the movement and position of the vocal folds in the larynx. When the vocal folds close, they prevent air from passing through, contributing to vocal fold closure. Additionally, the tension in the vocal folds can be adjusted by these muscles, affecting the pitch of the voice.
The intrinsic laryngeal muscles play a crucial role in controlling the movement and tension of the vocal folds (vocal cords). Two critical effects created by these muscles are vocal fold closure and tension. These actions are essential for the production of sound during speech and singing. When the intrinsic laryngeal muscles contract, they bring the vocal folds together (vocal fold closure) and adjust their tension. The degree of tension in the vocal folds, along with the length and thickness, influences the pitch and intensity of the produced sound. The correct answer is, therefore, vocal fold closure and tension.