In addition to feedback mechanisms, what other control mechanism does the body use?
a. balanced mechanisms
b. feedforward mechanisms
c. complimentary mechanisms
d. hybrid mechanisms
e. ancillary mechanisms
b
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If a thyroid tumor secreted an excessive amount of calcitonin, we would expect ________.
A. an elevated level of osteoclast activity B. a rise in blood calcium concentration C. increasingly brittle bones D. an elevated level of osteoblast activity E. a reduced rate of endochondral ossification
If a toxic drug inhibited mRNA synthesis, which of the following would be most directly affected?
A. Protein synthesis B. Microtubule production C. Secretion of glycoproteins and lipoproteins D. Active transport E. Intracellular digestion
The physiological activities of the digestive system are not regulated by
A) hormones. B) parasympathetic and sympathetic neurons. C) the contents of the digestive tract. D) intrinsic nerve plexuses. E) the cerebral cortex
An isometric contraction does not change muscle length.
Answer the following statement true (T) or false (F)