Which of the following is always a component of allergies?
Out of all the answers shown above the one that best represents the one that is always a component of allergies is answer choice A) histamine.
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Answer:
Qualitative research im pretty sure
Explanation:
Lymphocytes are amassed in the lymph hubs. The spleen and the thymus are additionally lymphoid organs of the resistant framework. The tonsils are lymphoid organs that are additionally connected with the stomach related framework. Lymphoid tissues contain lymphocytes, and furthermore, contain different sorts of cells for support. The confusion is legitimately coordinated with the lymphatic organ dependable is Spleen; failure to expel pathogens from lymph
Answer: A
Explanation: The blood–air barrier (alveolar–capillary barrier or membrane) exists in the gas exchanging region of the lungs. It exists to prevent air bubbles from forming in the blood, and from blood entering the alveoli. ... The barrier is permeable to molecular oxygen, carbon dioxide, carbon monoxide and many other gases.
<span>If a person's body becomes so accustomed to a particular drug that it can only function normally if the drug is present, that person is <u>dependent </u>on the drug.
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