The most abundant nitrogenous waste in blood is urea, which is produced by the combination of ammonia with carbon dioxide.
Answer the following statement true (T) or false (F)
True
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The main homeostatically regulated variable of the cardiovascular system is the mean systemic arterial blood pressure.
Answer the following statement true (T) or false (F)
Which of the following structures is not part of the external ear?
A) pinna B) external acoustic meatus C) tympanic membrane D) pharyngotympanic tube
The nervous system controls the activity of muscles and glands. Muscles and glands can generate changes and are therefore called
A. stimuli. B. afferents. C. visceral. D. effectors.
T cells and B cells destroy one antigen without affecting other antigens or normal tissues, this is termed
A) memory. B) versatility. C) tolerance. D) specificity. E) antigen processing.