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Olfactory Epithelium Structure

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Questions and Answers

What are the main components of the olfactory epithelium structure?

The main components are sustentacular cells, olfactory receptor cells, and basal epithelial cells.

Where are the nuclei of the sustentacular cells located in the olfactory epithelium structure?

The nuclei of the sustentacular cells tend to be in the top portion of the layer and are covered by cilia and microvilli.

What is the function of Bowman's glands in the olfactory mucosa?

Bowman's glands secrete gel-forming mucin and proteins like lysozyme, amylase, and IgA. They may also produce odorant binding protein.

What type of neurons are olfactory neurons?

Olfactory neurons are bipolar neurons. Signup and view all the answers

Where do the apical dendrites of olfactory neurons end?

The apical dendrites of olfactory neurons end in many cilia, which protrude from the olfactory receptor into the mucus. Signup and view all the answers

What is the role of adenylyl cyclase (AC) and cyclic AMP (cAMP) in the olfactory receptor activation process?

Adenylyl cyclase (AC) and cyclic AMP (cAMP) are involved in the activation of olfactory receptors by mediating the opening of ion channels in the cell membrane. Signup and view all the answers

Describe the process of calcium influx and its role in olfactory receptor activation.

Calcium influx occurs after the cAMP-activated channel opens, and it leads to the formation of calmodulin (CaM), which further regulates the closure of the cAMP-activated channel. Signup and view all the answers

What is the function of CaMKII in the olfactory receptor activation pathway?

CaMKII is activated by the presence of calmodulin (CaM) and phosphorylates adenylyl cyclase III (ACIII) to reduce cAMP production, as well as activates phosphodiesterase (PDE) to hydrolyze cAMP. Signup and view all the answers

How are olfactory neurons connected to the olfactory cortex, and what is the role of the frontal lobe in olfactory processing?

Olfactory neurons synapse in the olfactory bulbs and then send signals via the olfactory tract to the olfactory cortex. Some signals also go to the frontal lobe for conscious interpretation, such as fight or flight responses through the sympathetic autonomic nervous system. Signup and view all the answers

Explain the relationship between olfactory receptors, glomeruli, and odour activation.

Each olfactory receptor binds to a variety of odor molecules, activating a certain set of glomeruli in the olfactory bulb. This results in unique odorant profiles and specific glomerular activation patterns. Signup and view all the answers

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