The filtrate that leaves the proximal convoluted tubule is much more concentrated than the blood in humans.
Answer the following statement true (T) or false (F)
False
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In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a _____
A) moss sporophyte B) moss gametophyte bearing both male and female gametangia C) fern sporophyte D) hermaphroditic fern gametophyte E) fern gametophyte bearing only antheridia
Which of the following is a cure for people with recurrent infection from Clostridium difficile?
A) Renal transplantation B) Genetic restructuring C) Grafting D) Fecal transplantation
In vertebrates, mechanoreceptors are not found in which of the following:
1.skin 2.skeletal muscles 3.walls of blood vessels 4.internal organs 5.all of these structures have mechanoreceptors
The LD50 of Vibrio cholerae is 108 cells through the oral route. If the bacterial cells are ingested with bicarbonate, the LD50 drops to 104. Which of these explanations is the most likely?
A) Sodium bicarbonate decreases the virulence of Vibrio cholerae. B) Stomach acid decreases the virulence of Vibrio cholerae. C) Vibrio cholerae makes toxin only in the presence of stomach acid. D) Stomach acid increases the virulence of Vibrio cholerae. E) Sodium bicarbonate inactivates Vibrio cholerae.