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Q. What is the use of Adrenergic Receptor?
Adrenergic Receptors are also subdivided into 2 major categories: ALPHA α - or- BETA β
In general, when NE (E) binds to alpha receptors -> excitatory
beta receptors -> inhibitory (with notable exceptions: heart β1) Beta-1 receptors are found on heart -> NE (E) stimulates HR and SVBeta-2 receptors are found on lungs and some viscera -> (-) NE serves to dilate airways and slow down GI tract activity. Note that non-specific β (1,2) blockers decrease HR and BP, but can also constrict airways (undesirable effects).
POR T AL CIRCULATION When a vein branches into set of capillary to distribute blood in some parts, such venous circulation is called portal system. Three types of portal syst
Q. Do echinoderms have circulatory and respiratory systems? In echinoderms there are not well- defined respiratory with the exception of the holothurian group and circulatory s
The nucleolus is a small and optically dense region in the interior of the cell nucleus. It is made of ribosomic RNA (rRNA) and proteins. Single nucleus can have one or more nucleo
Osmoregulation in Aqueous Environments You are aware that the aqueous environments are of two types: i) Freshwater and ii) Seawater. The osmotic concentration of thes
Define Titrimetric Method - 2, 6 Dichlorophenol Indophenol Method? The titrimetric method is a redox titration method which depends on the reduction of the blue dye 2,6 dichlor
In biology, a species is smallest and basic unit of classification. Each species is placed within a single genus. For example biological name of human being is homosapiens. Here ho
give an account of ciliary and flagellar movement in protozoa
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Explain the Protein Deficiency? One of the most common nutritional disorders in the world today is the deficiency of protein. Both adults and children are affected, as the popu
Difference between Distant object and Near object - Distan t object Near object 1. Parallel light reaches to eye. 2. Ci
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