The main hormone secreted by a corpus luteum is:
a. Human chorionic gonadotropin
b. Luteinizing hormone
c. Oxytocin
d. Progesterone
e. Prolactin
ANS: D
Corpora lutea, which originate from an ovulated follicle, secrete progesterone to maintain the re-ceptivity of the uterine endometrium for the implantation of a zygote.
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A. carbaminohemoglobin B. loaded hemoglobin C. carboxyhemoglobin D. deoxyhemoglobin E. oxyhemoglobin
The gallbladder ________.
A. breaks down red blood cells B. is attached to the pancreas C. produces bile D. produces secretin E. stores bile
In astigmatism the cornea or the lens is elliptically rather than spherically curved.
Answer the following statement true (T) or false (F)