The primary goal of the immune response is
A. stimulation of mitotic activity in order to replace cells damaged by infection.
B. maintenance of the proper ionic balance between lymph and blood.
C. destruction or inactivation of pathogens and foreign material.
D. removal of antibodies from lymph and lymphatic organs.
E. reduction of the number of circulating memory lymphocytes.
Answer: C
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The external urethral sphincter
A. is controlled by the somatic nervous system. B. surrounds the external urethral orifice. C. opens before the internal urethral sphincter during the micturition reflex. D. is composed of smooth muscle fibers. E. All of the choices are correct.
An excessive urine output is called anuria
Indicate whether the statement is true or false
Which of the following medications serves as a positive treatment by interfering with the removal of calcium ions from the sarcoplasm of cardiac muscle cells?
a. verapamil b. acetylcholine c. beta blockers d. digitalis
Which of the following structures separates the lower lip from the chin?
A. Vermilion zone B. Tubercle C. Labial commissure D. Labiomental groove E. Nasolabial sulcus