Cells are placed in a solution that causes them to absorb liquid until they burst. When more water is removed from the solution, newly added cells do not burst. The original solutions was ________ , while the second was ________ to the cells.
A. isotonic; hypotonic
B. hypertonic; isotonic
C. isotonic; hypertonic
D. hypotonic; isotonic
Answer: A
You might also like to view...
When blood calcium levels are low
A. ostoclast activity increases. B. calcitonin secretion increases. C. osteoblast activity increases. D. calcium absorption is reduced. E. bones produce more bone tissue.
Which part of the pleural membrane is not in direct contact with the lungs?
A. Peritoneum B. Pleura C. Parietal D. Visceral
According to the most current model of the plasma membrane,
A. the membrane is a rigid unchanging structure. B. cholesterol forms the innermost layer of the membrane. C. phospholipids and cholesterol form a single lipid bilayer. D. proteins are free to move about within a double layer of phospholipids. E. the membrane is impermeable to all other molecules.
Which of the following vitamins is needed to aid in absorption of iron?
A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D