What is bulbus Olfactorius?

The olfactory bulb (Latin: bulbus olfactorius) is a neural structure of the vertebrate forebrain involved in olfaction, the sense of smell.

Where are the olfactory bulbs located?

There are two olfactory bulbs on the bottom side of the brain, one above each nasal cavity. The olfactory bulbs receive information about smells from the nose and send it to the brain by way of the olfactory tracts.

What is the pathway for smell?

The pathway of olfactory conduction begins with the olfactory receptors—small, slender nerve cells embedded in large numbers (about 100 million in the rabbit) in the epithelium of the mucous membrane lining the upper part of the nasal cavity. Each olfactory receptor cell emits two processes (projections).

What do odorant molecules bind to?

odorant receptors
Odorant molecules bind to odorant receptors (R) located in the ciliary membrane, thus activating a G protein (Golf) that stimulates adenylyl cyclase (AC), producing an increase in the generation of cAMP from ATP.

Which lobe is responsible for smell?

Temporal lobe
Temporal lobe It also helps your sense of smell. Your short term memory is also kept here.

How many glomeruli are in the olfactory bulb?

1,800
The axons of cells expressing one of the more than 1,000 odorant receptor genes were seen to travel from distant portions of the olfactory epithelium and converge with astonishing precision in one or two of the 1,800 olfactory glomeruli (Fig.

What nerve is taste?

The three nerves associated with taste are the facial nerve (cranial nerve VII), which provides fibers to the anterior two-thirds of the tongue; the glossopharyngeal nerve (cranial nerve IX), which provides fibers to the posterior third of the tongue; and the vagus nerve (cranial nerve X), which provides fibers to the …

What are odorant receptors?

olfactory receptor, also called smell receptor, protein capable of binding odour molecules that plays a central role in the sense of smell (olfaction). These receptors are common to arthropods, terrestrial vertebrates, fish, and other animals.

What are odorant molecules?

Olfactory receptors (ORs), also known as odorant receptors, are chemoreceptors expressed in the cell membranes of olfactory receptor neurons and are responsible for the detection of odorants (for example, compounds that have an odor) which give rise to the sense of smell.

What nerve controls taste and smell?

Olfactory nerve (CN I) Its receptors are located in the olfactory mucosa under the roof of the nasal cavity. The olfactory fibers cross the skull base through the olfactory foramina of the cribriform plate and enter the olfactory bulb in the olfactory groove.

What is the sense of smell called?

Olfaction is the sensation of smell that results from the detection of odorous substances aerosolized in the environment. Along with vision, taste, hearing, and balance, olfaction is a special sense. Humans are able to detect odors through the components of the olfactory system.