Describe the roles proteins play in the human body
The Functions of Body Proteins
1 . Growth and Maintenance
• Proteins provide building materials—amino acids—for growth and repair of body tissues.
• Body structures. Proteins form vital parts of most body structures, such as skin, nails, hair, membranes, muscles, teeth, bones, organs, ligaments, and tendons.
2 . Regulatory Roles
• Enzymes. Proteins facilitate numerous chemical reactions in the body; all enzymes are proteins.
• Hormones. Some proteins act as chemical messengers, regulating body processes; not all hormones are proteins. Examples include: insulin, glucagon, and thyroid hormone.
• Antibodies. Proteins assist the body in maintaining its resistance to disease by acting against foreign disease-causing substances.
• Fluid balance. Proteins help regulate the quantity of fluids in body compartments.
• Acid–base balance. Proteins act as buffers to maintain the normal acid and base concentrations in body fluids.
• Transportation. Proteins move needed nutrients (e.g., minerals, lipids) and other substances (e.g., oxygen) into and out of cells and around the body.
3 . Energy and Glucose Production
• Energy. Protein can be used to provide calories (4 calories per gram) to help meet the body's energy needs.
You might also like to view...
Which of the following best describes the credentials that a registered dietitian holds?
a. Minimum B.S. in nutrition b. Minimum B.S. in nutrition, accredited internship, national certification exam c. Minimum B.S. in nutrition, training in diet counseling d. Minimum B.S. in health, personal trainer certification
The rhetorical norms of writing are the different levels of writing on which one can focus attention
a. True b. False Indicate whether the statement is true or false
Explain why nutrition therapy is so important for burn injuries
What mineral is added to refined flours in the enrichment process?
a. iron b. iodine c. calcium d. magnesium e. copper