A low fat cookie with 2 grams of fat, 10 grams of carbohydrate, and 2 grams of protein contains:
A. 14 calories
B. 56 calories
C. 66 calories
D. 126 calories
C
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Which of these factors stimulates the juxtaglomerular apparatus to produce renin?
A. sudden decreases in blood pressure B. concentration of sodium ions in the blood is too low C. concentration of potassium ions in the blood is too high D. both sudden decreases in blood pressure and concentration of sodium ions in the blood is too low. E. All of these conditions increase renin secretion.
Match the following items with the correct phrases.
_______1. _______________ are chemical mediators that enable cells to communicate with each other. _______2. When attached to the surface of particles or cells, ____________________ can facilitate phagocytosis. _______3. Proteins produced by one bacterial species that kill other bacterial species are known as ____________________. _______4. ____________________ are small, antiviral proteins that are produced by virus-infected cells. _______5. ____________________ attract leukocytes to sites where they are needed. a. bacteriocins b. chemotactic agents c. complement fragments d. cytokines e. interferons
Explain why the use of iPS cells for stem cell therapies may be a desirable alternative to the use of either embryonic stem cells or adult stem cells
What will be an ideal response?
Four of the five processes below have markedly
influenced the evolution of life. Select the exception. a. continental drift b. natural selection c. inheritance of acquired characteristics d. geological catastrophes e. asteroid impacts