Which muscle surrounds the anus?
A) levator ani iliococcygeus
B) pubococcygeus
C) external anal sphincter
D) external urethral sphincter
C
Explanation:
A) The levator ani iliococcygeus does not surround the anus.
B) The pubococcygeus does not surround the anus.
D) The external urethral sphincter does not surround the anus.
Exercise 20: Muscles of the Pectoral Girdle and Upper Limb
Exercise 20: Pre-Lab Questions
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Obstruction of the airways leads to
A. Respiratory acidosis B. Respiratory alkalosis C. Metabolic acidosis D. Metabolic alkalosis
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 immunityProvide protection against extracellular antigens
Fill in the blank(s) with the appropriate word(s).
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A) placenta and attached fetal extraembryonic membranes B) amniotic fluids C) meconium, bile, and other wastes D) urine