During external respiration, gases are exchanged between the:
A. Outside air and the alveoli
B. Cytoplasm and the mitochondria
C. Blood and body cells
D. Alveoli and the blood
E. Nasopharynx and the oropharynx
Ans: D. Alveoli and the blood
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Sympathetic fibers leave the spinal cord in the ________.
A. lumbar and sacral regions B. cranial and thoracic regions C. cranial and sacral regions D. thoracic and lumbar regions E. cervical and sacral regions
Sometimes called the "tailor's muscle" because it was used by tailors to sit cross-legged, the muscle that originates on the ilium and crosses both the hip and the knee joint is the ________,
Fill in the blank(s) with the appropriate word(s).
The majority (70%) of CO2 in blood is transported in what form?
A. bound to albumin B. carbaminohemoglobin C. dissolved CO2 D. HCO3- E. H2CO3
Which of the following statements regarding neural regulation of gastrointestinal function is TRUE?
A. Networks of neurons in the wall of the GI tract innervate the wall's smooth muscle. B. Smooth muscle of the GI tract is innervated by both sympathetic and somatic motor nerves. C. If the autonomic nerves to the GI tract were cut, digestion and absorption of food could no longer take place. D. The nerve plexus of the GI tract exists in a single layer, just outside of the serosa. E. There are no afferent neuronal pathways from the GI tract to the central nervous system.