Actin myofilaments
A. resemble bundles of minute golf clubs.
B. contain both myosin and tropomyosin.
C. are held in place by the M line.
D. contain strands of fibrous actin.
E. are the thickest proteins in muscle.
D
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A) segmentation B) mastication C) peristalsis D) ingestion
Which of the following is NOT true regarding ventilation-perfusion inequality?
A. It is increased from normal in patients with emphysema. B. It is caused by too little or too much blood flow relative to ventilation. C. No inequality exists in normal lungs. D. It may result from increased alveolar dead space. E. It is caused by too little or too much ventilation relative to blood flow.
Which of the choices below reflects the balance (or imbalance) between the direction and amount of fluid that flows across the capillary walls?
A) hydrostatic pressure only B) hydrostatic and osmotic pressure C) plasma and formed element concentration D) blood volume and viscosity
Serum is essentially identical to plasma except for the absence of ________.
A. fibrinogen B. glucose C. nitrogenous wastes D. platelets E. albumin