which of following may be the final product encoded by a gene?
a) sugars
b) triglycerides
c) protein
d) RNA
c) protein
d) RNA
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Normal expirations are brought on by
a. contraction of the external intercostals. b. contraction of the internal intercostals. c. contraction of the diaphragm. d. elastic recoil of inspiratory muscles. e. elastic recoil of expiratory muscles.
For most cells, the membrane potential is closer to the Ek+ (-90 mV) than for ENa+ (+ 60 mV). This is because
a. EK+ <<<< ENa+, and systems tend toward lower energy states. b. cells like potassium better than sodium, so they work to maintain potassium closer to its equilibrium distribution. c. cell membranes are equally permeable to Na+ and Cl-, so every time a Na+ comes in, its depolarizing effect is negated by a Cl- ion. d. cell membranes are more permeable to K+ than Na+, so there are a greater number of pathways available for K+ to move towards its equilibrium distribution than are available for Na+ to do the same. e. none of these.
Cerebrospinal fluid carries small amounts of chemicals like glucose from the _____ to neurons and neuroglia
a) interstitial fluid b) bile c) intracellular fluid d) arachnoid space e) blood
The pulmonary circuit contains about ________ percent of the total volume of blood.
A) 5 B) 15 C) 22 D) 9 E) 31