The respiratory system is the only system involved with the exchange of gas between the cells of an organism and the external environment
Indicate whether the statement is true or false
F
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Which of the following statements is false or incorrect?
A) Cardiac muscle contracts when stimulated by its own autorhythmic muscle cells. B) Under normal resting conditions, cardiac muscle tissue contracts and relaxes about 75 times per minute. C) Cardiac muscle fibers depend mostly on anaerobic cellular respiration to generate ATP. D) Cardiac muscle fibers can use lactic acid to make ATP.
The species of modern humans is called ________.
A. Australopithecus B. Homo sapiens C. Homo habilis D. Homo erectus E. early Homo
Which statement is false regarding cancellous bone?
A. This type of bone is found in the end of long bones. B. This type of bone is arranged in slivers and plates called trabeculae. C. This type of bone is arranged in a series of osteons. D. This type of bone does not have Haversian systems.
Hormones can be divided into different groups based on their chemistry. These categories include all of the following except
A) peptides. B) steroids. C) eicosanoids. D) amino acid derivatives. E) acetylcholine derivatives.