The pulmonary circuit ____
a. involves the hepatic portal vein
b. moves oxygen-rich blood to the kidneys
c. includes the coronary arteries
d. leads to, through, and from the lungs
e. receives blood from the left ventricle
d
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A single human cell encloses about 1.5 meters of DNA containing 4.5 billion base pairs. How far apart are these base pairs in the DNA?
a. 3.3 × 10^?10 nm b. 3.3 × 10^10 nm c. 3 × 10^9 nm d. 300 nm e. 0.33 nm
An example of keystone species are ____
a. beavers that build dams b. mice that feed on mushrooms and truffles c. Douglas fir trees d. kudzu e. earthworms that aid decomposition
In patients who receive transplants, the recognition protein in the transplanted organ would be different than that of the recipient. What would this mean for the patient?
1.The patient would begin to recognize the new protein as self.
2.The patient’s immune system would attack and reject the new organ, requiring the patient to take immune suppressing medication.
3.The protein of the transplanted organ must be changed to match that of the patient.
4.The proteins on the surface of the cells from the transplanted organ will modify themselves to more closely resemble those of the patient, so the patient’s immune system wouldn’t reject it.
An elderly woman is experiencing fever, chest pain, difficulty breathing, and a cough that occasionally brings up mucus containing blood. She reports having visited family in rural New Mexico over the Labor Day weekend. A GMS-stained sample from her lungs shows the presence of large spherules. Which of the following is the most likely infecting agent?
A. Coccidioides immitis B. Blastomyces dermatitidis C. Histoplasma capsulatum D. Paracoccidioides brasiliensis E. Trichophyton rubrum