Parts of the External Ear

Q.

What is cerumen?

Q.

The waxy substance which coats the surface of the auditory canal is produced by

1. Zeis glands

2. Parotid glands

3. Meibomian glands

4. Ceruminous glands

Q.

The most important structures to receive external stimulus are (1)__ and the system of these organs is called (2)__ .Two major sense organs are (3)__ and (4)__. The sense organs of human body are of (5)__ types.

1. 1. Effectors organs, 2. Motor system, 3. Eye, 4. Ear, 5. 6

2. 1. Receptor organs, 2. Sensory system, 3. Ear, 4. Eye, 5. 5

3. 1. Effectors organs, 2. Motor system, 3. Eye, 4. Ear, 5. 4

4. 1. Receptor organs, 2. Sensory system, 3. Ear, 4. Eye, 5. 3

Q. Arrange the following parts of ear, from inside to outside in human beings.

1. Stapes
2. Incus
3. Malleus
4. Cochlea

Q. Identify the correct sequence of organs/regions in the organisation of human ear as an auditory mechanoreceptor organ.

1. Pinna-Cochlea-Tympanic membrane-Auditroy canal-Malleus-Stapes-Incus-Auditory nerve
2. Pinna-Tympanic membrane-Auditory canal -Incus -Malleus-Stapes -Cochlea-Auditory nerve
3. Pinna-Malleus-Incus-Stapes-Auditory -canal-Tympanic membrane-Cochlea-Auditory nerve
4. Pinna-Tympanic membrane-Auditory canal Cochlea-Malleus-Incus-Stapes-Auditory nerve
5. Pinna-Auditory canal-Tympanic membrane -Malleus-Incus-Stapes-Cochlea-Auditory nerve