Once food is digested, the nutrients must be absorbed by the epithelial cells that line the specialized portions of the alimentary canal. Small, hydrophobic molecules can diffuse down concentration gradients across the membrane. What types of molecules would require ACTIVE TRANSPORT in order to get across?
A. minerals
B. monoglycerides
C. water
D. salt
E. amino acids
Answer: E
Biology & Microbiology
You might also like to view...
Which of the following sex chromosome abnormalities have detectable phenotypic effects? (Choose all that apply)
A. 47, XYY B. 47, XXX C. 45, X D. 47, XXY E. 47, +21
Biology & Microbiology
Which of the following organisms is considered a primary consumer?
A. a cougar B. algae C. a grasshopper D. a toadstool E. a holly bush
Biology & Microbiology
Eukaryotic chromosomes have evolved ________ at the ends of linear chromosomes to ensure the replication of the two ends of the chromosomes.
A) methylases B) capping proteins C) ligases D) telomeres E) single-stranded binding proteins
Biology & Microbiology
The excess of expenses over revenues for a period is:
a. Net assets. b. Equity. c. Net loss. d. Net income. e. A liability.
Biology & Microbiology