In bronchopulmonary dysplasia, the lungs of newborns become inflamed and scarred
Most infants with this condition recover, but some die. An experimental treatment
cultures stem cells from a newborn's umbilical cord.
The stem cells, in a lab dish, give
rise to type II cells, which in turn give rise to more type I cells. In this treatment
A) the stem cells directly replace alveoli.
B) both type I and type II cells produce surfactant.
C) the type I cells secrete surfactant and the type II cells form the respiratory
membrane.
D) the type II cells secrete surfactant and the type I cells form the respiratory
membrane.
D
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The portion of the uterine endometrium that is not sloughed off every month is called the ________.
Fill in the blank(s) with the appropriate word(s).
The thymus is in the mediastinum behind the sternum
Indicate whether the statement is true or false
When comparing the solute concentration of two solutions, the ________ solution has a higher solute concentration
A) isotonic B) hypotonic C) hypertonic D) solvent
An eccentric contraction is described as
A. action potential frequency is high enough that no relaxation of muscle fibers occurs. B. a muscle produces an increasing tension during contraction. C. a muscle produces tension, but the length of the muscle is increasing. D. a muscle produces constant tension during contraction. E. a muscle produces increasing tension as it shortens.