Question

The spaces guarding the opening of glottis in amphibians are
A.Vocal chords
B.Rima glottidis
C.Glottis bands
D.Glottis chords

Answer 1

Hint: The spaces guarding the opening of glottis are meant for respiration and phonation. The space lies in between the true vocal cords and the arytenoids cartilage of the larynx. The shape of the opening changes with movement of vocal cords.

Complete answer:
To solve this question, we must know about the glottis and its significance in the amphibian.
Amphibians have lungs for respiration. They take in air through the nostrils to the lungs through the larynx. There is a space present at the opening of glottis which is meant for both respiration and sound production. It is called Rima glottidis. It lies in between the true vocal cords and the arytenoids cartilage of the larynx. It is the narrowest part in the larynx which is longer in males than in females.
Vocal chords- It is the two bands of smooth muscle tissue found in the larynx. The vocal cords are responsible to produce sound.
Glottis bands- They are the smooth muscle tissue found in the larynx
Glottis chords- It is also known as vocal chords.
The vocal cords produce sound by the vibration of the air that passes through the cord from the lungs.

Hence the correct answer is option(B)

Note: When the glottis is closed, the air pressure builds up below the vocal folds. When the glottis is open, the air bursts through the vocal folds and produces sound.