What stimulates the release of parathyroid hormone (PTH)?
A) cold temperatures B) hypocalcemia
C) low basal metabolic rate D) hypercalcemia
Answer: B
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Which answer places the following events in proper order for pulmonary ventilation?
a: Thoracic cavity volume changes. b: Brainstem nuclei stimulate skeletal muscles to contract. c: Air flows down its pressure gradient. d: Dimensional changes in the thorax lead to pressure changes within the lung. A. b, a, d, c B. d, c, b, a C. b, d, c, a D. a, c, d, b E. c, a, d, b
The study of how the body functions is called:
a. physiology b. homeostasis c. anatomy d. dissection
Nerve impulses are sent to slow the heart's rate of contraction. The nerve fibers sending these signals will most likely belong to which division of the nervous system?
A) sensory (afferent) division B) somatic nervous system C) sympathetic division D) parasympathetic division
Lymph differs from plasma in that
A) lymph is colorless and plasma is red. B) plasma has more protein than lymph. C) lymph is thin and plasma is viscous. D) lymph has more protein than plasma.