An aggregation of cells and extracellular materials which performs a discrete function is known as a/an ________.
A. cell
B. organelle
C. organ
D. tissue
Answer: D
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Neurotransmitters:
a. are released by the postsynaptic neuron b. are distributed randomly throughout the nervous system c. can diffuse back into the synaptic knob d. all of the above
The partial pressure of oxygen in the pulmonary veins is
a. about 40 mmHg b. equivalent to alveolar partial pressure c. dramatically different than pulmonary arteries partial pressure d. equivalent to the partial pressure of oxygen in the arteriolar ends of systemic capillaries e. all of the above
The bronchial circulation is a component of the pulmonary circulation.
Answer the following statement true (T) or false (F)
Identify the following bones as either a facial bone or a cranial bone: vomer, ethmoid, sphenoid, temporal, and inferior nasal conchae
A) The vomer and inferior nasal conchae are facial bones; the ethmoid, sphenoid, and temporal bones are cranial bones. B) The vomer, ethmoid, sphenoid, and inferior nasal conchae are facial bones; the temporal bones are cranial bones. C) The inferior nasal conchae are facial bones; the vomer, ethmoid, sphenoid, and temporal bones are cranial bones. D) The vomer, inferior nasal conchae, and the sphenoid are facial bones; the ethmoid and temporal bones are cranial bones. E) The sphenoid, ethmoid, and temporal bones are facial bones; the vomer and inferior nasal conchae are cranial bones.