Bones that are longer than they are wide and generally have enlarged ends for articulations are classified as ________ bones.
A. irregular
B. long
C. flat
D. short
Answer: B
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Phenylketonuria (PKU) is a genetic disease caused by mutation of the PAH gene, which normally produces the enzyme phenylalanine hydroxase. This enzyme is essential for the conversion of the amino acid phenylalanine into tyrosine. Without the enzyme, phenylalanine builds up in the blood and tissues of various body regions. It can produce severe skin discolorations and foul odor, but also intellectual disabilities and behavioral problems. Some people may experience only one type of PKU symptoms and not the others. PKU is an example of
A. incomplete penetrance. B. pleiotropy. C. genetic heterogeneity. D. complete penetrance.
The ________ lymphatics leave the lymph node at the hilum
A) ascending B) lateral C) afferent D) descending E) efferent
The utricle detects changes in head position away from horizontal and vertically directed linear acceleration and deceleration
Indicate whether the statement is true or false
Which of the following fetal shunts connects the umbilical vein with the inferior vena cava?
A. ductus arteriosus B. umbilical vein C. umbilical artery D. ductus venosus E. foramen ovale