The ________ carry blood toward the lungs.
A. aorta and pulmonary arteries
B. superior and inferior venae cavae
C. pulmonary arteries and veins
D. pulmonary trunk and veins
E. pulmonary trunk and arteries
Answer: E
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Which of the following is produced when electrons are accepted by oxygen during cellular respiration?
a) Anions b) Cations c) Metabolic water d) Lipids e) Carbohydrates
Identify the following components:
Which of the following factors keeps the alveoli expanded?
A. Negative intra-alveolar pressure B. Alveolar pressure being equal to atmospheric pressure C. A reduction in surfactant D. A pneumothorax E. Negative pleural pressure
When blood glucose levels rise, the pancreatic islets are stimulated to release insulin, which acts on target cells to uptake glucose from the blood. Thus, the islets serve as the ________ in the feedback loop.
A. integrating center B. sensors C. effectors D. All of the choices are correct.