Which type of immunity occurs as a result of having had and recovered from a disease?
Ans: Natural active
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Symptoms of Addison's disease include all of the following EXCEPT ________.
A. low blood pressure B. hyperactivity C. weight loss D. excessive skin pigmentation
In mammals, the __________ is the main blood vessel leading from the heart to the lungs
Fill in the blank with correct words.
The extrinsic pathway of coagulation is activated by the
A) release of tissue factor by a damaged endothelium. B) activation of a proenzyme exposed to collagen. C) conversion of prothrombin to thrombin. D) sticking of platelets to damaged tissue. E) release of heparin from the liver.
Skeletal muscle is described as ________
A) fibrous and containing ground substance B) striated and involuntary C) striated and voluntary D) nonstriated and involuntary E) nonstriated and voluntary