What forms the respiratory membrane (air-blood barrier)?
A) respiratory bronchioles and alveoli
B) terminal bronchioles and respiratory bronchioles
C) systemic capillaries and cells of the body
D) the visceral and parietal pleura
E) the fused basement membranes of alveolar and pulmonary capillary walls
E
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__________ stimulates uterine contractions during parturition and milk letdown from the mammary glands
Fill in the blank(s) with correct word
The myelin sheaths that surround the axons of some of the neurons in the CNS are formed by
A) astrocytes. B) Schwann cells. C) oligodendrocytes. D) microglia. E) ependymal cells.
Birds derive seminal fluid from the
a. seminiferous tubules. b. vasa efferentia. c. vas deferens. d. seminiferous tubules and vasa efferentia. e. seminiferous tubules and vas deferens.
"Somatosensory" does not refer to sensory signals from ________.
A. joints B. the skin C. the viscera D. bones and muscles E. proprioceptors