Pulmonary emphysema is characterized by a number of derangements of pulmonary structure and function. Which of the following is NOT a feature of pulmonary emphysema?
A. Chronic inflammation of bronchioles leads to trapping of air in the lungs.
B. Flow of air in and out of the lungs is greatly increased.
C. Nonuniform ventilation of alveoli reduces the efficiency of ventilation.
D. Enlargement of air spaces and reduction of capillary surface area within the lungs reduces the efficiency of gas exchange.
E. A loss of lung elasticity requires active expiratory effort.
Question 2
Infections with viruses cause various clinical manifestations. Which of the following is NOT a manifestation of a virus infection?
A. The virus damages or destroys infected cells.
B. Formation of inclusion bodies in infected cells
C. Production of endotoxins
D. The virus causes proliferation of infected cells.
E. The virus infects cells but causes only an asymptomatic (latent) infection.
A closer look at the structure and function of photosystem II
Amino Acid Structure
Lymph node structure.
The structure of the potassium channel pore
Structure of molybdenum-dependent nitrogenase from Azotobacter vinelandii
Skin structure. Three-dimensional view of the skin, subcutaneous tissue, glands, and hairs