Which type of transport proteins use cell energy to move molecules across the plasma membrane?
A. Cadherins
B. Ligand-gated ion channels
C. Leak-ion channels
D. ATP-powered pumps
Answer: D
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When lying down, a subject's respiratory rate is 12 breaths per minute, his anatomical dead space is 150 mL, and his minute ventilation is 7 L/min. Which of these is closest to his alveolar ventilation in liters per minute?
A. 5.2 B. 6.0 C. 0.583 D. 3.0 E. 4.2
Which are the main types of phagocytes involved in the innate immune response?
A) Macrophages and neutrophils B) Macrophages and basophils C) Neutrophils and B cells D) Basophils and eosinophils
Which of the following types of globulins function as part of the body's defense system?
A) alpha B) omega C) beta D) ancillary E) gamma
A presynaptic axon contacts the dendrite of a postsynaptic neuron. How would you describe the synaptic relationship?
A. It is an axosomatic synapse. B. It is an axodendritic synapse. C. It is an electrical synapse. D. It is an excitatory synapse. E. It is an axoaxonic synapse.