Which of the following statements about water is not correct?
A) It is composed of polar molecules.
B) It is responsible for much of the mass of the human body.
C) It has a relatively low heat capacity.
D) It can dissolve many substances.
E) It contains hydrogen bonds.
Answer: C
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Intrapleural pressure exceeds airway pressure
a. during normal quiet breathing b. during maximal forced expiration c. in response to a pneumothorax d. during maximal forced expiration and in response to a pneumothorax e. in all of the above situations
What is the role of RNA polymerase in transcription?
A) RNA polymerase signals the end of the mRNA molecule. B) RNA polymerase binds the DNA promoter and builds an mRNA molecule. C) RNA polymerase carries the code for the amino acid in a sequence of nucleotides. D) RNA polymerase catalyzes the unwinding of the DNA double helix.
Large proteins and red blood cells normally pass freely through the filtration membrane.
Answer the following statement true (T) or false (F)
A 19-year-old man with a ruptured appendix is sent to the emergency department for surgery. To cut off the blood supply to the appendix (if collateral circulation is discounted), a surgeon should ligate which of the following arteries?
(A) Middle colic artery (B) Right colic artery (C) Ileocolic colic artery (D) Inferior mesenteric artery (E) Common iliac artery