Figure 4.16
What is a main function of the structure in the accompanying figure labeled B?
A. It controls cell shape.
B. It separates DNA during cell division.
C. It helps nerve cells lengthen.
D. It is found in hair.
E. It helps regulate DNA replication.
Answer: A
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Facilitated diffusion is specific. This means ____
a. a specific protein will transport certain polar or charged molecules but not others b. that only one specific integral protein per membrane is involved in facilitated diffusion c. that the energy molecule ATP is specifically required for transport d. only specific hydrophobic molecules can be transported e. that transport of molecules occurs only in specific cells
The disease characterized by a high blood glucose due to a deficiency of insulin production or failure of cells to respond to insulin is ____________ mellitus.
Fill in the blank(s) with the appropriate word.
Which organ system does NOT play a role in acquiring materials and energy?
A. digestive B. skeletal C. muscular D. cardiovascular
The lophophore of a brachiopod serves the same function as the ________ in a bivalve.
A. Shell B. Foot C. Mantle D. Gills