This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: Anatomy
What do the semicircular canals detect ? 
Select and explain. 
A. Linear acceleration, B. Angular acceleration, C. Speed, D. Balance
B: Angular acceleration
Answer: B: Angular acceleration 
Explanation: Ans, is 'b' i.e., Angular acceleration Semicircular canalso 3 in number - lateral, posterior and superior and lie in planes at right angles to each other,o Each canal has an ampuliated end which opens independently into the vestibule. The non ampullated ends of the posterior and superior canals unite to form a common channel, called the crus commune.o Thus, the 3 canals open into the vestibule by 5 openings,o They respond to angular acceleration and deceleration.o The one wrhich lies at right angles to the axis of rotation is stimulated the most,o The ampullated ends contain the receptors for angular acceleration, called the crista ampullaris.Utricle and sacculeo The utricle receives the 5 openings of 3 semicircular canals.o The sensory epithelium of the utricle is called the macula and is concerned with linear acceleration and deceleration.o Saccule has similar function.