Which of the following is the most complex structural level of organization?
A) organ level B) cellular level C) chemical level D) tissue level
Answer: A
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One of the immediate products of mitochondrial respiration is
A) Oxygen. B) ATP. C) Carbohydrate. D) Carbon monoxide.
The individual cells produced by cleavage are called
A) embryos. B) blastomeres. C) blastocytes. D) blastocysts. E) zygotes.
Veins
A. carry blood away from the heart. B. carry blood under very high pressure. C. may contain valves and are lined with endothelium. D. are described as strong, rigid vessels that always carry oxygenated blood. E. have thick, many layered walls.
Which of the following components of saliva is mismatched with its function?
A. mucin - lubricant B. lysozyme - antibacterial properties C. bicarbonate - neutralizes acid D. IgA - prevents infection E. salivary amylase - begins protein digestion