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  1. Maintenance of calcium ion homeostasis is critical to neurological, cardiac and skeletal muscle function. Consider the roles of two hormones involved in the regulation of the concentration of calcium ions in the blood. Parathyroid hormone increases the concentration of calcium ions in the blood, while calcitonin decreases the concentration. Based on this information predict the body’s response to restore calcium balance if a person swallowed 100 antacid tablets made of a calcium compound in 10 minutes. Include in your answer the definition of homeostasis, the type of feedback loop involved and all of the components of a feedback loop.

 

Provide one important example (in the human body) of each of the following:

 

  1. a single molecule containing ionic bonds

 

  1. a single molecule containing covalent bonds

 

  1. a single molecule containing hydrogen bonds

 

 

 

  1. What is the function of each of these three molecules you have identified in the human body? Explain why each of these three molecules must have its specific types of bonds in order to perform that molecule’s function.
  2. Define mitosis and meiosis, and describe the differences between these two processes.
  3. List the skin glands and write details about their functions. What would be the consequences if a person’s skin glands stopped functioning?
  4. Describe how the structures of the epidermis allow it to provide immediate and indirect protection to underlying tissues.
  5. Compare the organization and functions of axial and appendicular skeletons, and describe in detail the girdles of the latter.

 

 

 

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