The movement of molecules across a membrane from an area of higher concentration to an area of lower concentration with the use of a carrier molecule embedded in the membrane is called ________.
A. passive diffusion
B. osmosis
C. facilitated diffusion
D. active transport
Answer: C
You might also like to view...
Which of the following statements about the physiological responses of plants to increasing temperatures and carbon dioxide levels is false?
A. Many plants devote more resources to reproduction under these conditions. B. Many plants produce flowers earlier in response to increased temperatures. C. Many plants produce leaves earlier in response to increased temperatures. D. The amount of nitrogen in plant tissues declines in response to increased CO2. E. None of the answer options is false.
Explain the ecological significance of limiting resources, using three specific examples in your discussion. What will be an ideal response?
In humans, egg production (oogenesis) differs from sperm production (spermatogenesis) in that spermatogenesis
A. produces many more cells than oogenesis. B. occurs on a monthly cycle. C. produces polar bodies. D. occurs for a short period of a person's life.
All of the following represent anchoring junctions EXCEPT
A. tight junctions. B. focal adhesions. C. desmosomes. D. adherens junctions. E. hemidesmosomes.