A. Causes arteriolar dialation
B. causes bronchodialtion
C. Causes pain when injected subcutaneously
D. Is released following injury and in certain allergic responses
Related Mcqs:
- Which of the following histamine blockers has no effect on muscarinic receptors______________?
A. Diphenydramine
B. Promethazine
C. Terfenadine
D. Pyrilamine - Histamine is present on surface of_______________?
A. Lymphocytes
B. Mast cells
C. Neutrophils
D. Erythrocytes - Histamine stimulate the secretion of_______________?
A. Gastrin by stomach
B. Pancreatic enzymes
C. HCL by stomach
D. Amylase by salivary gland - Histidine is converted to histamine by_____________?
A. Transamination
B. Hydroxylation
C. Decarboxylation
D. Reduction - The immediate type of hypersensitivity in which histamine doses not play a major role is______________?
A. Urticaria
B. Asthma
C. Anaphylaxis
D. Arthus reaction - All of the following are true except____________?
A. A special application of dantrolene is used to treat malignant hyperthermia
B. Interferons have a role in immunology of cancer
C. Thalidomide is used for the treatment of leprosy
D. Allopurinol is a derivative of 8-mercaptopurine - Which of the following is true for carbonic anhydrase inhibitor ?
A. It causes excertion of Na & Cl
B. It is used as an adjunct in epilepsy
C. It is very potent
D. It causes metabolic alkalosis - The following statements about verapamil are true except_____________?
A. It does not produce reflex tachycardia
B. It is less potent as a coronary vasodilator
C. It is contraindicated in patients with supraventicular tachycardia
D. It can cause constipation - Which of the following statements regarding nitroglycerin is true ?
A. The effect is more pronounced in venous
B. High membrane penetrability
C. Poorly suited for oral administration
D. All of the above - All of the following statements regarding biovailability of a drug are true except______________?
A. It is the proportion (fraction) of unchanged drug that reaches the systemic circulation
B. Biovailability of an orally administered drug can be calculated by comparing the area under cure (o-a) after oral and intravenous (IV) administration
C. Low oral biovailability always and necessarily mean poor absorption
D. Biovailability can be determined from plasma concentration or urinary excretion data
