The respiratory system does NOT function in:
A) blood cell production. B) acid-base homeostasis.
C) speech production. D) odor detection.
Answer: A
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The muscle primarily responsible for producing the mouth posture shown in the following figure is:
A) orbicularis oris. B) risorius. C) zygomaticus major. D) buccinator. E) levator labii superioris.
The electrical properties of cells are the result of
A. ion concentration differences across the plasma membrane. B. phospholipids in the plasma membrane. C. phosphorylation reactions within the cytoplasm. D. receptor sites that are present on the plasma membrane. E. None of these choices are correct.
The reactions of the Krebs cycle:
A. take place in the cytosol of human cells. B. generate ATP directly by substrate-level phosphorylation. C. are important for the metabolism of carbohydrates but not other molecules. D. take place only when no oxygen is present. E. produce pyruvate and lactate as end products.
Contraction of respiratory muscles are responsible for the movement of air out of the lungs in quiet expiration
Indicate whether the statement is true or false.