Which of the following is not true regarding the right atrioventricular valve?
A) It has 3 cusps.
B) It is also called the tricuspid valve.
C) It prevents backflow of blood from the right ventricle into the right atrium.
D) The valve closes when the right atrium contracts.
E) The cusps provide one-way flow of blood.
D
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Which of the following is incorrect pertaining to the perineal body?
A) Stretching or tearing during parturition is associated with prolapse of pelvic viscera. B) It is an attachment site for the external anal sphincter. C) It is an attachment site for both the superficial and deep transverse perineal muscles. D) It lies anterior to the vestibule in females. E) It blends anteriorly with the perineal membrane.
The chambers of the heart include:
a. two upper larger chambers called the atria b. two lower smaller chambers called the ventricles c. two lower larger chambers called the ventricles d. both A and B above
Crushing, mashing, and grinding of food are best accomplished by the action of the __________.
a. bicuspids b. eyeteeth c. cuspids d. incisors
Air moves into the lungs during inspiration due to the force of __________.
A. the diaphragm B. the abdominal muscles C. atmospheric pressure D. the external intercostal muscles