Which of the following is the correct order of steps of gas transport and exchange?
A. ventilation, diffusion across the respiratory
surface, circulation, diffusion between blood
and cells
B. diffusion across the respiratory surface,
ventilation, diffusion between blood and cells,
circulation
C. ventilation, circulation, diffusion across the
respiratory surface, diffusion between blood
and cells
D. circulation, diffusion across the respiratory
surface, ventilation, diffusion between blood
and cells
E. diffusion between blood and cells,
circulation, ventilation, diffusion across the
respiratory surface
A
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What are molecules such as viruses and bacteria that are foreign to the host and stimulate the immune system to react?
What will be an ideal response?
Antimicrobial agents that damage nucleic acids also affect
A) the cell wall. B) the cell membrane. C) the viral envelope. D) endospores. E) protein synthesis.
About 5% of those with Rubinstein-Taybi syndrome develops cancer as a result to decreased gene expression. This is directly linked to abnormal histone modification caused by a dysfunctional enzyme. What enzyme is this?
A) histone deacetyltransferase (HDAC) B) histone acetylase (HAT) C) DNA methyltransferase (DMT) D) BRCA1 E) No enzyme could cause this as cancer is caused only by direct DNA mutations.
An example of a one-way relationship in which one species benefits and another is directly hurt is ____
a. commensalism b. mutualism c. interspecific competition d. scramble competition e. parasitism