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Chapter 7: Q20CP (page 217)
Why do the symptoms of an autoimmune disease often differ between individuals?
The symptoms of an autoimmune disease often differ between individuals due to their difference in locations and severity.
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When you hold a weight at arm鈥檚 length, you are not doing any thermodynamic work but the muscles supporting the weight are nevertheless consuming energy. Describe, on the molecular level, how muscles might maintain such state of constant tension without contracting. Why does this state consume ATP?
What are some factors that might contribute to the development of an autoimmune disease?
Antibodies are well suited for recognizing extracellular substances from invading bacteria and viruses. However, the immune system must also be able to respond to intracellular infections. Explain why the immune system includes binding proteins that recognize F-actin.
Some bacteria produce proteases that can cleave the hinge region of IgA molecules without affecting antigen binding. Explain why these proteases would give the bacteria a better chance of starting an infection.
Question: Cells contain an assortment of proteins that promote microfilament disassembly during cell shape changes. How can such proteins distinguish newly synthesized microfilaments from older microfilaments?
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