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Exocrine glands contain a glandular portion and a duct portion, the structures of which can be used to classify the gland. [1]The duct portion may be branched (called compound) or unbranched (called simple).
RSV, respiratory syncytial virus, usually peaks in December and January while infecting the nose, throat and lungs, usually causing mild, cold-like symptoms, the CDC says. Those symptoms make it ...
Viral teguments can be symmetrically arranged via structural and scaffolding protein or can also be asymmetrically arranged, depending on the virus. [citation needed] Teguments are rarely [citation needed] haphazardly placed and usually involve scaffolding proteins in their formation around the nucleocapsid.
Hemagglutinin esterase (HEs) is a glycoprotein that certain enveloped viruses possess and use as an invading mechanism. HEs helps in the attachment and destruction of certain sialic acid receptors that are found on the host cell surface. [1]
Therefore, HA is responsible for binding influenza viruses to sialic acid on the surface of target cells, such as cells in the upper respiratory tract or erythrocytes, [3] resulting in the internalization of the virus. [4] Additionally, HA is responsible for the fusion of the viral envelope with the late endosomal membrane once exposed to low ...
The virus wraps its delicate nucleic acid with a protein shell known as the capsid, from the Latin capsa, meaning "box," in order to shield it from this hostile environment. Similar to how numerous bricks come together to form a wall, the capsid is made up of one or more distinct protein types that repeatedly repeat to form the whole capsid.
The endocrine system [1] is a messenger system in an organism comprising feedback loops of hormones that are released by internal glands directly into the circulatory system and that target and regulate distant organs.
MR is the process by which two, or more, virus genomes containing lethal damage interact within the infected cell to form a viable virus genome. Such MR was demonstrated for adenovirus 12 after virions were irradiated with UV light and allowed to undergo multiple infection of host cells. [ 25 ]