Name and describe several hormones that affect digestion in the gastrointestinal tract
What will be an ideal response?
Gastrin is produced by cells of the stomach that stimulates nearby cells to produce hydrochloric acid and other enzymes, such as pepsinogen. Secretin from the small intestine causes the pancreas to produce bicarbonates, and other cells of the walls of the small intestine produce cholecystokinin, which causes the pancreas to produce various other enzymes important for digestion.
Analyze and Evaluate the Concepts (Essay)
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How is it possible that multiple sites of DNA replication can exist inside the cell?
A. there are multiple origins of replication B. genes are replicated quickly, so there are usually >4 of one gene at a time C. there are not multiple sites of replication D. during cytokinesis, DNA is replicated at twice the rate
If hemoglobin is saturated (1.3 mL of oxygen per gram) and there are 150 grams of hemoglobin per liter of blood, how much oxygen can be delivered to the tissue if cardiac output is 15 liters per minute?
A) 2925 g O2/min B) 2925 mL O2/min C) 1300 g O2/min D) 650 g O2/min E) 1300 mL O2/min
Why do red and blue light drive photosynthesis more effectively than green light?
a. because chlorophyll cannot absorb red and blue light b. because chlorophyll can absorb green light c. because chlorophyll can absorb red and blue light d. because chlorophyll cannot absorb green light
Which one of the following choices is of the first lines of defense against infection for humans?
A) White blood cells B) Skin C) Interferon D) Natural killer cells