What type of epithelial tissue is found in the stomach?
A. stratified squamous epithelium
B. simple cuboidal epithelium
C. simple columnar epithelium
D. transitional epithelium
E. pseudostratified ciliated columnar epithelium
C
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A researcher engineers a deletion in the genome of sperm cell DNA that inhibits production of an enzyme in the sperm cell membrane. The researcher then adds the sperm to a culture dish with a secondary oocyte, along with chemicals to guide the sperm to the oocyte. Upon observation, it is found that the sperm fails to penetrate the corona radiata of the oocyte. What enzyme has been deleted from the sperm membrane?
A. Juno B. Catalase C. Acetylcholinesterase D. Hyaluronidase
Matching
A) NREM stage 2 B) REM C) NREM stage 1 D) NREM stage 4 E) NREM stage 3 30) The stage when vital signs (blood pressure, heart rate, and body temperature) reach their lowest normal levels. 31) Indicated by movement of the eyes under the lids; dreaming occurs. 32) Theta and delta waves begin to appear. 33) Very easy to awaken; EEG shows alpha waves; may even deny being asleep. 34) Typified by sleep spindles. 35) Begins about 90 minutes after the onset of sleep. 36) May allow the brain to work through emotional problems in dream imagery
What type of pathogen causes Type A influenza?
A. A DNA virus B. A fungus C. An RNA virus D. A bacterium
The __________ of the kidney is segregated into triangular regions with a striped appearance
a) cortex b) nephron c) medulla d) renal pelvis