Linear accelerations and head-tilts in the horizontal plane are detected by:

1. utricle

2. semicircular canals

3. organ of Corti

4. saccule

Identify the correct statement regarding the semicircular canals of the human internal ear:
1. There are three of them, all oriented in the same direction but sensitive to all possible head motions.
2. There are six of them, organized in three pairs with each pair sensitive to one kind of motion, such as up or down.
3. There are three stacked in a random fashion; all contributing to fluid flow through the utricle and saccule which interpret the direction of head movement from the resulting
fluid flow.
4. There are three oriented in different planes so that angular acceleration can be detected.

Static equilibrium is regulated by:

1. semicircular canals
2. vestibule
3. cochlea
4. None 

The maculae are the sensory organs in the:

1. cochlear duct
2. saccule
3. semicircular canals
4. semicircular ducts

Which part of the human ear plays no role in hearing as such but is otherwise very much required?
1. Eustachian tube
2. Organ of Corti
3. Vestibular apparatus
4. Ear ossicles

A gymnast is able to balance his body upside down even in total darkness because of
1. Cochlea
2. Vestibular apparatus
3. Tectorial membrane
4. Organ of corti