How does the mitochondrial content vary among muscle types and species?
What will be an ideal response?
Answer: The mitochondrial content of glycolytic muscle is sparse, typically comprising less than two percent of the intracellular space, whereas the levels are usually 3- to 10-fold higher in the oxidative muscle fibers of the same animal. Highest concentrations of mitochondria are found in the flight muscles of insects and hummingbirds with almost half of the intracellular volume occupied by mitochondria.
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A left ventricular assist device
A. is routinely used in people who have had heart attacks. B. can maintain cardiac function until a donor heart becomes available. C. is an implantable replacement heart. D. can substitute for the atria.
Although all the anatomical parts of muscle work together to give it it's characteristics, which of the following proteins listed below would be most associated with the characteristics of contractility?
A) voltage gated sodium channels B) thick (myosin) filaments C) elastic (titin) filaments D) potassium (K+) leak channels
Which of the following serves as a nucleus in the midbrain that is involved in maintaining muscle tone and coordinating movements?
A) inferior olivary nucleus B) cerebral peduncles C) substantia nigra D) suprachiasmatic nucleus
What are the building blocks of proteins?
A) Fatty acids B) Amino acids C) Diglycerides D) Nucleotides