The structure in the cell that programs the formation of ribosomes is the:
a. cilia
b. nucleus
c. nucleolus
d. endoplasmic reticulum
c. nucleolus
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The Hering-Breuer reflex
A. causes erratic respirations. B. helps prevent overinflation of the lungs. C. has its sensory components in the sympathetic nerves. D. is a normal response to increased oxygen content in the blood. E. limits how much air a person can expire.
Isotopes of an element have
A) the same atomic number and same atomic weight. B) different atomic numbers but the same atomic weight. C) different atomic numbers and different atomic weights. D) the same atomic number but different atomic weights.
What hormones are involved in pregnancy? What role do they play?
What will be an ideal response?
How does alveolar ventilation work in ventilation-perfusion coupling?
A. If partial pressure of carbon dioxide decreases, the bronchioles constrict. B. If partial pressure of carbon dioxide increases, the bronchioles dilate. C. Air flow is directed to lobules where partial pressure of carbon dioxide is high. D. All of these answers are correct.