The eggs of the blood fluke Schistosoma haematobium range from 110 to 170 µm long by 40 to 70 µm wide and have a sharp, pointed terminal spine. In which specimen is this organism most likely found?
a. Ascites fluid
b. Sputum
c. Bile
d. Urine
D
The size range for eggs of S. haematobium is 110 to 170 µm long by 40 to 70 µm wide, and they have a sharply pointed terminal spine. They are fully embryonated without an operculum. In human infection, the adult worms live in the veins that supply the urinary bladder (S. haemato-bium). The eggs are passed from the body in either the feces or urine.
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Which of the following is true of fatty acids?
A) Fatty acids are synthesized by the stepwise addition of three carbon units. B) Unsaturated fatty acids are usually branched. C) Fatty acids with 24 carbons are most common. D) Saturated fatty acids have no double bonds between carbons. E) Laurate is an unsaturated fatty acid.
Menstruation begins in response to ____
a. rising levels of FSH and LH b. rising levels of GnRH c. rising levels of progesterone d. falling levels of progesterone e. rising levels of estrogen
Complex carbohydrates are digested to
A. simple sugars. B. amino acids. C. proteins. D. fatty acids.
All of the following are correct about prokaryotes, except
A. they have organelles. B. they are found nearly everywhere. C. they are smaller than eukaryotes. D. they are less complex than eukaryotes. E. they lack a nucleus.