The cilia are A. the first structures involved in olfactory signal transduction. B. the axons involved in the firing of action potentials in the olfactory process. C. the last structures in the biochemical chain of events involved in odor perception. D. the cells that carry olfactory information to the thalamus. E. the most important type of epithelial cells.

The correct answer to the question is option A

THE CILIA ARE THE FIRST STRUCTURES INVOLVED IN OLFACTORY SIGNAL TRANSDUCTION.

Explanation: Cilia are organelles that is found in cells,they are hairlike in structure and they project to the outside is cells to help in mobility/locomotion in motile form and act as sensory organelles in non-motile form.

Example of places where cilia are found is the respiratory tract and female reproductive tract where they play a vital role in propelling foreign particles away from the lungs and propel the sperm in the direction of the uterus.

In olfactory signal transduction,the sensory cilia sends sensory impulse to the brain when smell isperceived especially that of food.

compost can be added to topsoil as a:

pesticide

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.