A person in his or her 90's can increase muscle strength by two or three times with 40 minutes of isometric exercise per week
Indicate whether the statement is true or false
TRUE
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Many hormones synthesized in the gastrointestinal tract are chemically identical to brain neurotransmitters
Indicate whether the statement is true or false
The receptors for smell are located in the upper nasal cavity out of the normal path of air currents
Indicate whether the statement is true or false
The growth spurt seen in puberty is triggered by
A. calcitonin. B. growth hormone. C. sex hormones. D. parathyroid hormone. E. thyroid hormone.
The respiratory pump assists blood movement within the veins of the trunk, because as a person inspires,
A. intra-abdominal and intrathoracic pressure both increase. B. intra-abdominal pressure decreases and intrathoracic pressure increases. C. intra-abdominal and intrathoracic pressure both decrease. D. intra-abdominal pressure increases and intrathoracic pressure decreases.