Answer:
c. cerebrospinal fluid
Explanation:
Cerebrospinal fluid
This fluid is a colorless , clear body fluid , that is present in the brain and the spinal cord .
Some specialized ependymal cells produces this fluid .
Around 125 mL of Cerebrospinal fluid is produced at one time , and around 500mL is produced daily .
The Cerebrospinal fluid is nearly 99% water which means it contain highest volume of fluid .
Duodenal ulcer is the diagnosis for a patient who experiences chronic intermittent pain in the epigastric area when the stomach is empty and in the middle of the night.
A duodenal ulcer is a peptic ulcer that develops in the first part of the small intestine. It occurs in the lower part of the esophagus. Few symptoms of duodenal ulcer are a dull or burning pain in the belly. The main cause of this ulcer is bacterial infection. The bacteria causes the lining of the stomach to become inflamed and an ulcer can form. Few medications such as ibuprofen may also cause ulcer.
The wound generally heals on its own but if the ulcer is deep it can cause serious pain or bleeding.
Learn more about duodenal ulcer here:
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Answer:
B The host cell receptor is CD4 which the viral spike protein GP120 will bind to.
Explanation:
In HIV binding and entry, the HIV protein envelope, glycoprotein GP120 binds to the host primary cellular receptor CD4 to fuse to the host cell membrane and then initiate infection.
The virus presents itself as viral membrane spikes (molecular mimics of host molecules), these spikes consist of three molecules of gp120 which are linked together and anchored by gp41 protein to the membrane. The gp120 then binds to CD4 receptor of the host cell to facilitate viral entry int the host cell and further illicit other responses that lead to infection and dominance.
It was the american hospital association. It was discovered in the early 1970’s
