A humble social media influencer just landed their private jet, and even though it's no longer moving the influencer still feels like their body is moving. Which structure helps regulate balance and equilibrium in the inner ear?

Question

BlackTom AI · Accepted Answer

Semicircular canals detect angular (rotational) acceleration, so they are the structure responsible for the persistent sensation of motion after the jet stops.

1) Relevant knowledge points and concepts
- The vestibular apparatus of the inner ear has two major subsystems: the semicircular canals (detect angular acceleration/rotation) and the otolith organs (utricle and saccule, detect linear acceleration and head position relative to gravity).
- Each semicircular canal is a fluid-filled (endolymph) tube oriented in one of three orthogonal planes with an enlarged ampulla containing a cupula and hair cells. Movement of endolymph deflects the cupula, bending hair cell stereocilia and producing neural signals via the vestibular nerve.
- When rotation stops abruptly, the inertia of the endolymph causes it to continue moving and deflect the cupula, creating a continued sensation of motion (a post-rotatory illusion).

2) Step-by-step reasoning
Step 1: The influencer experiences a continued sensation of movement after the plane stops — this is the classic post-rotatory or post-deceleration vestibular illusion.  
Step 2: Rotational motion (or rotation stopped suddenly) primarily stimulates semicircular canals because they sense angular acceleration via endolymph inertia.  
Step 3: Continued endolymph motion after the body stops keeps stimulating hair cells, producing the feeling of ongoing movement until the fluid dampens and equilibrium is re-established.

3) Intermediate mechanism details
- Three canals (horizontal, anterior, posterior) cover three rotational axes.  
- Endolymph inertia → cupula deflection → hair cell bending → altered neurotransmitter release → vestibular nerve firing pattern interpreted as motion by the brain.

4) Why the correct answer is correct
The symptom described (feeling movement when actual motion has ceased) arises from inertial behavior of endolymph in semicircular canals and their role in detecting angular acceleration; thus “Semicircular canals” is the appropriate structure.

5) Why other options are incorrect
- Stapes: a middle ear ossicle for sound conduction, not balance.  
- Cochlea: organ of hearing (frequency analysis), not equilibrium.  
- Pharyngotympanic tube: equalizes middle ear pressure; not involved in sensing motion.  
- Oval window: membrane interface for sound transmission into cochlea; not a balance receptor.

6) Conclusion
The semicircular canals, as described, regulate balance related to rotational movement, so the correct answer is Semicircular canals. This matches the provided answer.

A humble social media influencer just landed their private jet, and even though it's no longer moving the influencer still feels like their body is moving. Which structure helps regulate balance and equilibrium in the inner ear?单项选择题

类似问题

Question at position 13 Which structure(s) of the ear is(are) responsible for detecting changes in the position of the head?stapescochleaeardrumsemicircular canalsClear my selection

Question at position 35 An infection in which sensory organ might impact our vestibular system?The noseThe earThe eyeThe tongueClear my selection

Why is the vestibular system critical for pilots?

What is known as the organ of equilibrium?

Question at position 7 Which is the sensory structure of the semicircular canals?AmpullaSpiral organMacula

The sensory receptors for dynamic equilibrium are located in the:

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单