Which of the following accompanies emphysema?
A) increase in vital capacity
B) alveoli collapse and surface area is lost
C) pulmonary compliance decreases
D) decreased partial pressure of carbon dioxide in the blood
Answer: B
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Answer the following statements true (T) or false (F)
1. Running barefoot results in higher joint torque at the knee than using running shoes. 2. A motionless body is in a state of static equilibrium. 3. The center of gravity of an object is always located within the object. 4. When other factors remain constant, an increase in the mass of an object will subsequently increase the object's stability. 5. If force is applied directly to the axis of rotation, torque will equal zero.
Nonsteroid hormones have hormone receptors in the:
a. nucleus of the cell b. cytoplasm of the cell c. cell membrane d. both A and C above
A red blood cell, visualized in a blood smear, appears to stain less intensely in the center of the cell than at the periphery. This light staining central region results from:
a. A centrally located Golgi apparatus b. A greater accumulation of hemoglobin within the center of the cell c. A pale-staining nucleus d. An attenuation of the cytoplasm caused by the biconcave disk shape of the cell e. Lipid droplets
Which one of the following is NOT true of cholesterol?
A) Cholesterol provides energy fuel for muscle contraction. B) Cholesterol serves as the structural basis of steroid hormones. C) Cholesterol serves as the structural basis of vitamin D. D) Cholesterol is a major building block of plasma membranes. E) Only about 15 percent of cholesterol comes from the diet.