What is surfactant? Why is it important?
What will be an ideal response?
Surfactant, made by the type II alveolar cells, reduces the surface tension in the fluid in the alveoli, thereby facilitating inflation and inhibiting collapse of the alveoli.
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Consider the following list of commonly found items and their pH values:Battery acid (1.0), vinegar (2.2), grapes (3.5-4.5), tomato (4.0-4.5), beer (4.2), coffee (5.0), white bread (5.0-6.0), butter (6.1-6.4), egg whites (7.6-8.0), baking soda (8.3), milk of magnesia (10.6), bleach (12.8)Which of the following is closest to the pH of water?
A. Baking soda B. Grapes C. White bread D. Egg whites
Human placental lactogen _________ the effects of insulin and causes a pregnant woman's tissues to metabolize ______ glucose
A. facilitates; more B. facilitates; less C. inhibits; more D. inhibits; less
Explain how parathyroid hormone (PTH) acts to increase blood calcium ion levels
What will be an ideal response
Norepinephrine acts on the heart by ________
A) causing threshold to be reached more quickly B) blocking the action of calcium C) causing a decrease in stroke volume D) decreasing heart contractility