Which of the following is produced at the end of stage II during a fibrin clot formation?
A. Prothrombinase
B. Thrombinase
C. Thrombin
D. Fibrinogen
Answer: C. Thrombin
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Rather than tightly coupled synapses between neurons and muscle cells, single-unit smooth muscle contains
A. gap junctions that connect neurons to smooth muscle cells. B. varicosities of a subset of muscle fibers so that individual cells can be separately stimulated. C. diffuse junctions where neuron varicosities are responsible for neurotransmitter release. D. plaques and caveolae that contain multiple hormone receptors for discrete endocrine control.
The process of synthesizing glucose from lipids, amino acids, or other carbohydrates is called ________.
Fill in the blank(s) with the appropriate word(s).
The primary function of the distal convoluted tubule is
A) filtration. B) reabsorption. C) increased retention of sodium ions. D) secretion. E) None of the answers are correct.
Which of the following is not true of organelles?
A) They are only in cells of humans. B) They carry on specific activities. C) They are found in many types of cells. D) They are composed of aggregates of large molecules.