The partial pressure of oxygen is higher in the capillary blood than the interstitial fluid surrounding cells. Therefore oxygen moves from ____ to ____
a. blood; air
b. blood; interstitial fluid
c. air; interstitial fluid
d. interstitial fluid; blood
e. interstitial fluid; air
b
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Lipids are the only class of macromolecules that contain:
A. amino acids. B. nucleotides. C. fatty acids. D. phosphate groups. E. monosaccharides.
Once activated, cAMP is quickly degraded to AMP by ____ which results in switching off the signal
pathway.
a. adenylyl cyclase b. diacylglycerol (DAG) c. phospholipase C d. acetylcholinesterase e. phosphodiesterase
Your classmate does not have much muscle strength. Her doctor says she has an autoimmune disease, but you didn't quite catch the name the physician gave for the illness. Based on what you have learned, what do you think the diagnosis is?
A) Alzheimer's disease B) schizophrenia C) senility D) myasthenia gravis
What is considered one of the best sources of evidence for biological evolution?
A. the biblical creation story B. fossil record C. evidence for an intelligent designer D. the presence of analogous structures