The cytoplasmic space in eukaryotic cells is occupied by many diverse membrane-bound structures with specific cellular functions called
A. flagella.
B. chromosomes.
C. organelles.
D. cilia.
E. receptors.
Answer: C
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If, during protein starvation, the osmotic pressure on the venous side of capillary beds drops below the hydrostatic pressure, then _____
A) hemoglobin will not release oxygen B) fluids will tend to accumulate in tissues C) the pH of the interstitial fluids will increase D) most carbon dioxide will be bound to hemoglobin and carried away from tissues E) plasma proteins will escape through the endothelium of the capillaries
Some diseases can result from defective transport across the membrane. For example, cystic fibrosis results from a chloride ion transporter that does not function. Which of the following would be affected when this transporter does not function?
A. the chloride concentration gradient B. the electrical gradient of the cell C. Both a and b D. Neither a nor b
The cAMP __________ element-binding protein (_________ protein) is a regulatory transcription factor that is activated in response to signaling molecules that increase cytoplasmic cAMP.
Fill in the blank(s) with the appropriate word(s).
Openings on the leaf surface that are involved in gas exchange are called stroma.
A. True B. False