Which of the following layers and regions comprise the lobes of the kidney?
a. major and minor calyces
b. renal capsule and medulla
c. renal fascia and pelvis
d. cortex and renal pyramids
d. cortex and renal pyramids
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Normal biota of the urinary tract in both genders include all of the following except ________.
A. nonhemolytic Streptococcus B. Staphylococcus C. Escherichia coli D. Corynebacterium E. Lactobacillus
Albinism is an autosomal recessive trait in humans. Assume that there are 100 albinos (aa) in a population of 1 million. How many individuals would be expected to be homozygous normal (AA) under equilibrium conditions?
A) 999,900 B) 10,000 C) 980,100 D) 19,800 E) 100
Secretory IgA act protects the mucous membranes by:
A. Acting as an opsonin (a substance that mark the target for phagocytosis) B. Activating the helper T-cells C. Interfering with the adherence of the microbe to the mucous membrane D. Killing the invading microbe
In a bacterial cell, the chromosome is located in a region called the ______.
a. nucleoid b. nuclei c. nucleolus d. nucleus