A child is born with a rare disease in which mitochondria are missing from skeletal muscle cells. However, the muscles still function. Physicians find that the
A) muscles contain large amounts of lactate following even mild physical exercise.
B) muscles contain large amounts of carbon dioxide following even mild physical exercise.
C) muscles require extremely high levels of oxygen to function.
D) muscle cells cannot split glucose to pyruvate.
Answer: A
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Which of the following is NOT true concerning homeotic genes?
A. They encode transcription factors. B. They are the only types of genes that contain a region of DNA called the homeobox. C. They are found in clusters called complexes. D. A portion of the proteins they encode can bind DNA. E. They activate developmental genes.
A recovering stroke patient complained about strange smells in his room, but no cause could be found. The doctor diagnosed this as phantosmia, or olfactory hallucination, and said it was likely due to stroke-related damage to which tissue?
A. central nervous system B. olfactory receptors C. peripheral nervous system D. nodes of Ranvier Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about olfaction? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Increased heart rate and blood pressure and unusually heavy sweating are symptoms of
a. hyperthyroidism. b. Grave's disease. c. acromegaly. d. hypothyroidism. e. Wilson's disease.
The bulk of the energy required by the eukaryotic cell is generated by the mitochondria. The mitochondrion consists of cristae that
A) form a smooth, continuous outer membrane surrounding the entire organelle. B) form a complex fluid called a matrix outside the organelle. C) are elaborate folds on the inner membrane which hold the enzymes and electron carriers of aerobic respiration. D) are circular strands of DNA involved in producing the enzymes needed for anaerobic respiration.