Male ejaculation occurs as powerful, rhythmic contractions appear in which of the following muscles?
A) erector spinae and ischiocavernosus
B) bulbospongiosus and internal oblique
C) internal oblique and erector spinae
D) ischiocavernosus and internal oblique
E) ischiocavernosus and bulbospongiosus
E) ischiocavernosus and bulbospongiosus
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For ________ selection to occur, a lymphocyte must recognize and bind to an antigen.
A. natural B. positive C. negative D. immune
Which is not true about the thyroid gland?
A. It requires iodine to synthesize thyroid hormone. B. It is located on the anterior surface of the trachea, inferior to the thyroid cartilage. C. It has two lobes connected by a central portion called the commissure. D. It secretes thyroid hormone in response to stimulation by TSH. E. An enlargement of the thyroid gland is called a goiter.
The kidneys secrete additional H+ and conserve HCO3- to compensate for increased H+ concentration in the body fluids
Indicate whether the statement is true or false
Match the appropriate characteristic with the type of immunity.A. Innate immunityB. Antibody-mediated immunityC. Cell-mediated immunityD. Both antibody-mediated and cell-mediated immunityE. Innate immunity, antibody-mediated immunity, and cell-mediated immunityMediated by T cells
Fill in the blank(s) with the appropriate word(s).