What is the role of NO (nitric oxide) in the male sexual act?
A. Contraction of somatic muscles of the urogenital diaphragm
B. Activation of a G protein
C. Dilation of blood vessels in the penis
D. Secretion of mucus
Answer: C
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This figure shows a lateral view of the skull. What bone is visible within the suture indicated by number 3?
A. Wormian bone B. Sesamoid bone C. Pterygoid bone D. Condylar bone E. Lambdoid bone
The only liver function not accomplished by hepatocytes is the phagocytic activity carried out by the resident macrophages, which are known as __________ cells
Fill in the blank(s) with correct word
Which land cover category and associated country has experienced the greatest net loss due to deforestation?
a. Deciduous forest in Brazil b. Cropland and natural vegetation in Ukraine c. Shrublands in Russia d. Mixed forest in Korea
What part of the alimentary canal carries food to the stomach?
A) esophagus B) pharynx C) trachea D) small intestine