Cells use up to 40% of their daily energy expenditure engaged in what important process?
A) active transport
B) endocytosis
C) exocytosis
D) facilitated diffusion
Ans: A) active transport
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Water has the ability to dissolve polar covalent molecules like sucrose by
A) forming hydration spheres around the molecule. B) pulling atoms out of the molecule and into solution. C) creating crystals of positively and negatively charged atoms. D) taking electrons from the polar covalent molecule. E) ionization.
The action potential of a muscle fiber occurs
A. at the end plate. B. along the sarcolemma and down the T-tubules. C. within the sarcoplasmic reticulum. D. in the mitochondria.
All of the following are part of the conduction zone except:
A. main bronchi. B. respiratory bronchioles. C. segmental bronchioles. D. terminal bronchioles.
If the ET tube has been positioned properly in the trachea:
A) breath sounds should be somewhat louder on the right side and the epigastrium should be silent. B) you should not see vapor mist in the ET tube during exhalation when ventilating with a bag-mask. C) breath sounds should be loud at the apices of the lungs but somewhat diminished at the bases. D) the bag-mask device should be easy to compress and you should see corresponding chest expansion.