Lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called a(n) ________
A) Peyer's patch
B) thymus
C) tonsil
D) appendix
C
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The bones of the shoulder and pelvic girdles are part of the axial skeleton.
Answer the following statement true (T) or false (F)
The oral contraceptive pill, informally called "the pill" contains an estrogen and progesterone or a synthetic mimic of this hormone. The combination of these two hormones taken in the pill and circulating in the blood work because
A) The hormones cause the woman's body to mimic the activities of a pregnancy and disrupt the ovarian cycle, preventing ovulation. B) The hormones create an acid condition in the vagina that acts as a spermicide. C) The hormones prevent the proliferative or secretory phase of the menstrual cycle and the embryo will have no place to implant. D) The hormones cause a thickening of the mucus plug at the cervix that prevents sperm from penetrating the womb and reaching the ovulated egg.
Why does the reflux of gastric contents into the esophagus occur?
a. increased amounts of mucous produced by the stomach. b. increased hydrochloric acid production by the parietal cells. c. relaxation of the cardiac sphincter. d. spasms of the submucosal layer of the stomach wall. e. contraction of the pyloric sphincter.
The time period between fertilization and implantation is approximately
A. 5 days. B. 7 days. C. 10 days. D. 14 days. E. 21 days.