All of the following are true of hypersensitivity except
a. it occurs in the presence of an antigenb. it is synonymous with allergyc. it occurs when an individual is exposed to an allergen for the first timed. it is due to an altered immune responsee. it requires previous exposure to an antigen

The correct option is C.

Explanation:

Hypersensitivity is the process by which the immune system produce excessive reactions when exposed to certain antigens. There are four types of hypersensitivity, type 1 to type IV.

For hypersensitivity to occur some conditions must be fulfilled. For instance, an antigen must be present, the immune system must have been exposed to the antigen previously, etc. Hypersensitivity does not occur when the immune system is been exposed to an antigen for the first time.

yes? sounds right, but you didn’t ask a question.

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u