Question

Maculae in utricle and saccule senses what type of movement of the head? when you shake your head as to say no. when you are in the train that moves with constant speed. when you are in a car that is..............

Answer 1

The maculae in the utricle and saccule sense linear acceleration of the head, including tilting movements and the start or stop of motion in a vehicle.

Step-by-step explanation:

The maculae in the utricle and saccule are specialized to sense linear acceleration, such as when gravity acts on the tilting head, or when the head starts moving in a straight line. This includes movements like shaking your head to say no, or when you experience the start or stop of motion in a train or car.

The maculae achieve this through the bending of the hair cell stereocilia embedded in the otolithic membrane, which is made heavier by calcium carbonate crystals known as otoliths.

These otoliths add mass to the otolithic membrane, causing it to shift in response to head movements or changes in the position due to gravity, leading to the bending of stereocilia. As a result, some hair cells depolarize, while others hyperpolarize, sending signals to the brain via the vestibular nerve to interpret the head's position and maintain balance.