Which statement about CO2 is FALSE?
A) More CO2 dissolves in the blood plasma than is carried in the RBCs.
B) Its concentration in the blood is decreased by hyperventilation.
C) CO2 concentrations are greater in venous blood than arterial blood.
D) Its accumulation in the blood is associated with a decrease in pH.
A
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Electron microscopy allows for ________ magnification of specimens; therefore, ________ cell structures are visible using this form of microscopy
A) less; fewer B) greater; fewer C) greater; more D) less; more
After causing vibrations of the maleus, sound waves pass (in sequence) through the
A. stapes, round window, scala externa perilymph, scala media endolymph, and oval window. B. incus, stapes, oval window, scala vestibuli perilymph, and cochlear duct endolymph. C. oval window, scala tympani perilymph, scala vestibuli endolymph, and spiral organ. D. incus, stapes, oval window, scala tympani endolymph, scala vestibuli, and helicotrema. E. stapes, incus, round window, scala media perilymph, and scala vestibuli endolymph.
Which of the following statements about the respiratory membrane is true?
a. the membrane consists of the fusion of the simple squamous epithelia of an alveolus with the endothelium of a pulmonary capillary b. the membrane is very thin, approximately 0.5 micrometers c. oxygen and carbon dioxide diffuse quickly because of the large surface area of the respiratory membrane d. all of the listed statements are true
The mamillary body is part of the:
a. thalamus b. cerebellum c. hypothalamus d. midbrain