Fill in the blank(s) with the appropriate word(s)
Explain the process by which smell sensations are sensed and perceived
What will be an ideal response
Odorant molecules dissolve in mucus secreted by the olfactory epithelium and bind to receptors on olfactory hairs, triggering a generator potential in the olfactory receptor cells. In some cases the binding activates a G protein in the plasma membrane that activates adenylate cyclase that opens sodium ion channels. If the generator potential is above threshold, action potentials are generated in the axons of the olfactory receptor cells (first order neurons). These axons transmit impulses via cranial nerve I through the olfactory foramina of the cribiform plate and terminate in the olfactory bulbs, where they synapse with second order neurons. Axons from these neurons form the olfactory tracts, which transmit impulses to the olfactory area in the temporal lobe. Other important brain areas that receive impulses from the olfactory tracts include the limbic system, the hypothalamus, and the orbitofrontal area.
Anatomy & Physiology
You might also like to view...
An epithelium consisting of a single layer of cells in which all cells rest directly on the basement membrane is ______.
Anatomy & Physiology
When the concentration of water in body fluids increases, the secretion of ADH increases.
Answer the following statement true (T) or false (F)
Anatomy & Physiology
The X chromosomes from a female child are inherited from both the mother and father.
Answer the following statement true (T) or false (F)
Anatomy & Physiology
The thin layer of compact bone that separates an adult's epiphysis from the diaphysis is called the ________
A) metaphysis B) periosteum C) growth plate D) epiphyseal line E) diaphyseal line
Anatomy & Physiology