The cell membrane
A) has all of the above characteristics.
B) provides a barrier to water-soluble substances.
C) maintains the integrity of the cell.
D) controls the entry and exit of various substances.
A
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Differences in tubule ________ result in dramatic differences in which molecules are reabsorbed or secreted in each part of the tubule.
A. concentration B. pressure C. circulation D. permeability
Which labeled cell in the diagram will develop into thrombocytes?
a) G b) J c) K d) L e) E
Which of the following relationships is correct?
A. 1 kg = 2.2 lb B. 1 lb = 4.45 N C. both A and B are correct D. neither A nor B is correct
This figure compares the organization of the somatic motor system and the autonomic nervous system. Identify structure "D" on the above diagram.
A. Effector organ (smooth muscle of GI tract) B. Somatic motor neuron C. Postganglionic neuron D. Autonomic ganglion E. Preganglionic neuron