Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Define the control of tear production.
Control of Tear Production
The lacrimal secretary system was initially thought to be comprised of two parts, basic secretors and reflex secretors. Basic secretion corresponds to the accessory glands of Krause and Wolfring and reflex secretion to the main lacrimal gland.
Now, it is thought that all lacrimal glands respond as a single unit. The aqueous Eyelids, Lacrimal and Tear Film portion of tear fluid consists of reflex and basic secretois. Basic secretion occurs under sympathetic control (by blood flow regulation through the gland). Reflex secretion is controlled by the main lacrimal gland under parasympathetic control. There are two types of reflex secretion-peripheral and central reflex. Peripheral reflex occurs by stimulation of 5th nerve in the cornea. Central reflex occurs by the stimulation of the retina or psychogenic events. The aqueous component functions in hydration, lubrication, and oxygenation of the tear film. The lipid portion of tear fluid is secreted by the meibomian glands and functions in lubrication and prevents evaporation. The mucus layer is secreted by goblet cells and converts the corneal epithelium from a hydrophobic to a hydrophilic layer.
Which of the following is a situation in which a closed-loop negative feedback system is converted to an open-loop system? A disease that destroys all the A. V2 Receptors in a
The male had a female first cousin (on his father side) who died from TSD and the female had a maternal uncle with TSD. Assume this trait is very rare. 1. Calculate the probabil
What is succession?
Explain the Nutritional Factors that affecting food choice? Food choices made based on sound principles of nutrition will be conducive to good health while carelessness about n
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Define about the Ishihara's Plates of eyes Ishihara's Plates: Following plates are available- Transformation, Vanishing, Hidden Digit and Diagnostic plates. 1) The plates ar
RNA editing is the name given to several reactions whereby the nucleotide series on an mRNA molecule should be modified by mechanisms other than RNA splicing. T
The principal nitrogenous excretory compound in humans is synthesised: 1. in kidneys but eliminated mostly through liver 2. in kidneys as well as eliminated by kidneys 3.
Contamination due to Pathogens - Water Pollution Sewage is a source of pathogenic viruses, bacteria, worms and other parasites. The extent of contamination by these pathogens
porifera characteristics
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd