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The cupula is the onion-shaped structure surrounded by endolymph in the ampulla. The ampullary cupula, or cupula, is a structure in the vestibular system, providing the sense of spatial orientation. The cupula is located within the ampullae of each of the three semicircular canals.
At one end of each of the semicircular ducts is a dilated sac called a membranous ampulla, which is more than twice the diameter of the ducts. Each ampulla contains an ampullary crest, the crista ampullaris which consists of a thick gelatinous cap called a cupula and many hair cells. The superior and posterior semicircular ducts are oriented ...
These fibres signal the size of the detected electric field to the fish's brain. [14] The ampulla contains large conductance calcium-activated potassium channels (BK channels). Sharks are much more sensitive to electric fields than electroreceptive freshwater fish, and indeed than any other animal, with a threshold of sensitivity as low as 5 nV/cm.
2. Hollow Food Puzzles. As the name implies, these food puzzles are hollow, as they are meant to be filled with food. Their shape makes it challenging for dogs to extract the food, keeping them ...
(Endolymph is located in the cochlear duct - the light green region at the middle of the diagram.) illustration of otolith organs showing detail of utricle , ococonia , endolymph, cupula, macula , hair cell filaments, and saccular nerve
Dogs have ear mobility that allows them to rapidly pinpoint the exact location of a sound. Eighteen or more muscles can tilt, rotate, raise, or lower a dog's ear. A dog can identify a sound's location much faster than a human can, as well as hear sounds at four times the distance. [41] Dogs can lose their hearing from age or an ear infection. [42]
Does my dog understand me? Your dog knows when someone is speaking your native tongue or a foreign language, Hungarian researchers reported. Dogs understand foreign language, brain scans show
The AKC reports that one study found that 28% of dogs between 11 and 12 years of age have at least one sign of dog dementia, and that increased to 68% in dogs over 15 years of age.