Question

the semicircular canals are empty filled with gas filled with a liquid filled with bones or stones filled with sand grains question 4 1 pts olfactory receptor cells have a dendritic end that branches into several olfactory hairs true false

Explanation:

• Semicircular canals: These are part of the inner ear's vestibular system. They are filled with endolymph (a fluid). When the head moves, the fluid moves, which helps in detecting rotational movements and maintaining balance.
• Olfactory receptor cells: These are bipolar neurons. Their dendritic end has olfactory hairs (also called cilia). These cilia are covered with mucus. Odorant molecules dissolve in the mucus and bind to receptors on the cilia, initiating the sense of smell.

Answer:

• For the first question (about semicircular canals): "filled with a liquid"
• For the second question (about olfactory receptor cells): "True"