Which of the following statements about estrogens in females is FALSE?
A. In low plasma concentration, estrogen inhibits pituitary secretion of LH and FSH.
B. In high plasma concentration, estrogen stimulates pituitary sensitivity to GnRH.
C. In the presence of high plasma concentration of progesterone, estrogen stimulates increased secretion of GnRH.
D. Estrogen secretion is required for the LH surge.
E. Estrogen stimulates follicular growth.
C
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Natural Killer (NK) cells
A. are a type of plasma cell. B. are a type of macrophage. C. secrete enzymes that kill tumor or virus-infected cells. D. promote inflammation. E. are derived from B cells.
What is the path of blood from the heart, to the left zygomaticus muscles, and back to the heart?
A. Aorta > left brachiocephalic artery > left common carotid artery > left internal carotid artery > left occipital artery > zygomatic tissues > left maxillary vein > left internal jugular vein > left subclavian vein > left brachiocephalic vein > superior vena cava B. Aorta > left common carotid artery > left internal carotid artery > left maxillary artery > zygomatic tissues > left facial vein > left external jugular vein > left subclavian vein > left brachiocephalic vein > superior vena cava C. Aorta > left common carotid artery > left external carotid artery > left facial artery > zygomatic tissues > left facial vein > left internal jugular vein > left subclavian vein > left brachiocephalic vein > superior vena cava D. Aorta > left brachiocephalic artery > left common carotid artery > left external carotid artery > left facial artery > zygomatic tissues > left facial vein > left internal jugular vein > left subclavian vein > superior vena cava
Which type of epithelial tissue is composed of only one layer of cells, but appears layered, because some of the cells do not reach the free surface?
A. Transitional B. Stratified squamous C. Pseudostratified columnar D. Stratified cuboidal E. Simple columnar
Which region of the abdominopelvic cavity lies between the right and left lumbar regions?
A) epigastric region B) umbilical region C) hypogastric region D) right lumbar region