Which of the following organelles is sometimes called the powerhouse of the cell, because of its role in ATP production?
A. Lysosomes
B. Golgi apparatus
C. Peroxisomes
D. Centrosome
E. Mitochondria
Answer: E
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Slowing the heart rate during a dive is called __________
Fill in the blank with the correct word.
The concentration of ions in the chemical environment surrounding the neurons must be tightly regulated for neurons to function properly. Which of the following cells is most responsible for this?
A) satellite cells B) astrocytes C) Schwann cells D) oligodendrocytes
Solution A has a pH of 10, and solution B has a pH of 2. Which of the following statements about these solutions is true?
A. Solution A and solution B are both basic. B. Solution A has a higher H+ concentration than solution B. C. Solution A is acidic. D. Solution B is basic. E. Solution B has a higher H+ concentration than solution A.
Which of the following is NOT true of the basement membrane?
A. The cells closest to the basement membrane are dividing cells. B. It is acellular. C. It serves to anchor the epithelial tissues to the underlying connective tissue. D. It is composed of collagen and secretions from the cells. E. It is connected to the apical surface of epithelial tissues.