Choose all that apply. A concentration gradient is exhibited when
A. during rest, muscle and liver cells contain high glycogen concentration and blood contains lower concentrations.
B. the room temperature is 34 degree Celsius and the outside air is 34 degrees Celsius.
C. the pCO2 changes from 45 to 35 mmHg in the alveoli of lungs.
D. intracellular fluid has 5% solute and extracellular fluid has 0.8% solute concentration.
Answer: D
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Answer the following statement true (T) or false (F)
Gonadotropin-releasing hormone regulates
A. follicle-stimulating hormone. B. luteinizing hormone. C. steroid production by the gonads. D. both follicle-stimulating and luteinizing hormones. E. both follicle-stimulating and luteinizing hormones as well as steroid production by the gonads.
Groups that contain planktonic species include all the following EXCEPT
a. golden algae. b. apicomplexans. c. dinoflagellates. d. diatoms. e. red algae.
Many fish have a ________ system with hair cells that sense pressure waves.
Fill in the blank(s) with the appropriate word(s).