What are the vasa recta?
a. looped extensions of the afferent arterioles
b. looped extensions of the efferent arterioles
c. regions of the renal tubule
d. vessels that supply blood to the glomerulus
e. vessels that supply blood to the proximal convoluted tubule
B
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A high-pitched sound is characterized by which of the following?
A. a short wavelength and high frequency B. a short wavelength and low frequency C. a long wavelength and high frequency D. a long wavelength and low frequency E. a very long wavelength and very low frequency
Which of the following is/are secondary lymphoid organ(s)?
A. Thymus B. Spleen C. Lymph nodes D. Bone marrow E. Spleen AND lymph nodes
Crosscurrent flow is more efficient than countercurrent flow of air.
Answer the following statement true (T) or false (F)
Some traits are polygenic. Examples of human traits that are polygenic are skin color and height. What is a characteristic that could be used to describe all polygenic traits?
A) They cause diseases or disorders. B) They show a wide range of intermediate conditions between the extremes. C) They appear more commonly in males then in females. D) They are controlled by a single set of alleles