Anatomy - Physiology of the Utricle & Saccule [Otolithic Organs]

The video tutorial by Kevin explains the functions of the inner ear, focusing on the vestibule, utricle, and saccule. It covers how these structures detect changes in equilibrium, such as linear acceleration and head position. The tutorial also distinguishes between the vestibule and vestibular apparatus and explains the mechanism of autolytic organs. The differences in orientation between the utricle and saccule are highlighted, along with their roles in detecting horizontal and vertical acceleration.

What are the two main components of the vestibule?

• Utricle and Saccule

• Semicircular Canals and Vestibular Nerve

• Cochlea and Semicircular Canals

• Vestibular Nerve and Cochlea

How does the vestibular apparatus differ from the vestibule?

• It only includes the semicircular canals.

• It includes the cochlea.

• It comprises the utricle, saccule, and semicircular canals.

• It is a part of the cochlea.

What type of acceleration do the utricle and saccule primarily detect?

• Linear acceleration

• Rotational acceleration

• Centripetal acceleration

• Angular acceleration

What is the role of the autolytic membrane in the utricle and saccule?

• It transmits signals to the cochlea.

• It helps in detecting equilibrium changes.

• It supports the cochlea.

• It detects sound vibrations.

What happens to the hair cells when the head is tilted forward?

• They move to the left.

• They move to the right.

• They move upwards.

• They remain stationary.

How does the firing rate of axons change during head extension?

• It increases.

• It stops completely.

• It remains constant.

• It decreases.

What is the primary function of the utricle?

• Detecting sound waves

• Detecting rotational acceleration

• Detecting horizontal acceleration

• Detecting vertical acceleration

Which organ is better at detecting vertical acceleration?

• Vestibular Nerve

• Utricle

• Saccule

• Cochlea

What is the key difference between the utricle and saccule?

• Their location

• Their color

• Their orientation

• Their size

What will be covered in the next video?

• The vestibular nerve

• The semicircular canals

• The vestibule

• The cochlea