A fluid-filled blister develops when excessive rubbing of the skin causes the ________ and ________ to separate from each other
A) tight junctions; gap junctions
B) epidermis; dermis
C) dermis; hypodermis
D) melanocytes; keratinocytes
E) epidermis; hypodermis
B
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Which of the following is produced in largest numbers by the TCA cycle?
A. NADH B. FADH C. ATP (GTP) D. CO2
The reason for fetal globin chain switching is that
A) a fetus has four alpha globin chains and a newborn has four beta globin chains. B) a fetus's blood is clear until the sixth month and then globin chains turn it red. C) the newborn needs more iron than the fetus or embryo. D) the embryo and fetus receive different concentrations of oxygen compared to after birth.
The _____ is an external genital structure in the male that contains the testes.
A. prostate B. phallus C. scrotum D. fourchette
A hypothesis currently getting a lot of attention concerning the origin of biological molecules is that they originated ____.
A. in hot springs B. under ice sheets in Antarctica C. near hydrothermal oceanic vents D. in salt lakes E. in tidal pools