challenge

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challenge

 [chal´enj]
1. to administer a chemical substance to a patient for observation of whether the normal physiological response occurs.
2. in immunology, to administer antigen to evoke an immunologic response in a previously sensitized individual.
3. the administration of such a substance in order to assess for a response; called also provocation.
bronchial challenge (inhalational challenge) bronchial challenge test.

challenge

/chal·lenge/ (chal´enj)
1. to administer a substance to monitor for the normal physiological response.
2. in immunology, to administer an antigen to monitor the response in a sensitized person.

challenge

(chăl′ənj)
n.
Immunology The induction or evaluation of an immune response in an organism by administration of a specific antigen to which it has been sensitized.
v. chal·lenged, chal·lenging, chal·lenges
v.tr.
Immunology To induce or evaluate an immune response in (an organism) by administering a specific antigen to which it has been sensitized.

chal′lenge·a·ble adj.

challenge

1 a method of testing the sensitivity of an individual to a hormone, allergen, or other substance by administering a sample. A small amount may be injected to determine whether the immune system will react by producing appropriate antibodies.
2 a term used to describe the rapid or concentrated infusion of a substance such as potassium or magnesium in the face of a life-threatening deficiency or a rapid infusion of IV fluid to differentiate between fluid deficit or renal failure as the cause of severely decreased urine output.

challenge

Immunology The administration of an antigen or allergen to a person who has been previously exposed to the antigen, specifically to evoke an immune response

challenge,

n a stimulating or de-manding circumstance. To develop effective problem-solving skills and strategies, it is necessary to perceive such circumstance as inconvenience or burden instead of overwhelming impediments.
References in periodicals archive ?
9) This official assertion is challengeable both on its own terms and in relation to greater threats that loom as more than long-shot possibilities (e.
It also creates another legally challengeable decision.
However, these assumptions have become challengeable by the modified understandings of "individuals" and their minds that have arrived with the maturation of these "fragile sciences.
Sir Ian himself said: "I think the facts in Da Vinci Code may well be challengeable, but maybe the truths are not.
Pena says that the F-15 Eagle is not challengeable by any potential adversary.
As we see the struggles of people all over the world to live together, even those who have occupied the same country for a thousand years, we can rejoice in our ability to leverage our difference to create a new society where freedom exists, where everything is challenged and challengeable, where we can be an independent and diverse community.
Broadbent (2001) * Clear expectations * Satisfaction Black (1998) * Challengeable expectations * Clear business objective * Short classes Brown (1996) Chyung (2000, 2001a, 2001b) * Attraction * Confidence * Relevance * Satisfaction Chyung et al.
In other words, the rights and correlative duties of burial are vested in the same next of kin in a normatively challengeable manner.
Any national or local policy of a WTO or NAFTA signatory nation that falls outside WTO or NAFTA's terms--even if it has nothing to do with trade per se--is challengeable as an "illegal trade barrier" before a WTO or NAFTA tribunal.
The process of collecting or disseminating of visual data over internet, especially those which are dealing with concepts of spatial entity like architectural content, is becoming a challengeable task.
Overall, her presentation is helpful, the conclusion challengeable.