Mechanoreceptors for touch and pressure are located in numerous locations in the vertebrate body
Which of the following is NOT a location of such mechanoreceptors in vertebrates?
a. skin
b. skeletal muscles
c. internal organs
d. walls of blood vessels
e. bones
E
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What is the role of tubulin during mitosis in eukaryotic cells?
A. It pulls a cell's chromosomes apart during cell division. B. It is used to bind some adjacent cells together in animal cell junctions. C. It is necessary for the cell to grow. D. It is necessary for the DNA to replicate. E. It maintains cell shape with an internal scaffold structure.
Keratin is an important aspect of nonspecific defense because it
A. is toxic to pathogens. B. creates a physical barrier against pathogens. C. physically restricts pathogens to a specific region. D. destroys pathogens.
Organisms that depend on the energy stored in chemical bonds by other organisms for their food energy are called ________.
A. Chemotrophs B. Autotrophs C. Oligotrophs D. Heterotrophs
Magnesium chloride is a salt formed with ionic bonds between one magnesium ion and two chloride ions. Magnesium has two electrons in its outer shell and chlorine has seven electrons in its outer shell. How are the electrons transferred between these atoms?
A. Both magnesium and chlorine are reduced. B. Magnesium is oxidized and chlorine is reduced. C. Both magnesium and chlorine are oxidized. D. Chlorine is oxidized and magnesium is reduced.