Identify the gas or gasses that normally has/have a higher partial pressure in alveolar air than in the atmosphere:
A. carbon dioxide
B. carbon monoxide
C. oxygen
D. nitrogen
E. nitrogen and oxygen
Ans: A. carbon dioxide
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A single lobe of a kidney is comprised of __________.
A. two calyces and a renal pelvis B. one pyramid and the overlying cortex C. one major calyx and all of its minor calyces D. a renal medulla and two renal columns E. one collecting duct and all nephrons that drain into it
Cilia and flagella are distinguished from each other on the basis of
A. depth and numbers. B. length and width. C. width and numbers. D. length and numbers. E. None of the choices are correct.
Each bone consists of either compact or spongy bone, but not both.
Answer the following statement true (T) or false (F)
Which element of a reflex arc is responsible for carrying out an action in response to a stimulus?
A) motor neuron B) effector organ C) sensory receptor D) sensory neuron