Explain the mechanisms by which certain changes in environmental conditions can denature proteins
What will be an ideal response?
High temperatures weaken the intramolecular forces that hold the protein in its normal conformation. Excessive H+ (low pH) disrupts electrostatic interactions within the protein by binding to the negative R group. High pH disrupts protein structure by altering existing electrostatic interactions that involved hydrogen atoms that have changed their position due to the presence of base.
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In anticipation for a medical school swimming party, a 60-year-old male professor squeezes into last year's bikini bathing suit despite gaining 25 lb over the winter. Following a day of "impressing" his students and colleagues, he notices numbness, tingling, and a burning sensation in the lateral aspect of his left upper thigh. His symptoms are exacerbated by applying pressure near the left anterior superior iliac spine. What nerve is most likely affected?
(A) Lateral femoral cutaneous nerve (B) Femoral branch of genitofemoral nerve (C) Anterior cutaneous branches of femoral nerve (D) Ilioinguinalnerve (E) Iliohypogastric nerve
Which is an alternate term for compact bone?
A. Cancellous bone B. Trabecular bone C. Spongy bone D. Diploe E. Cortical bone
Which of the following effect the rate of gas exchange?
a. partial pressure gradient b. surface area for exchange c. diffusion distance d. solubility of the gas e. all of the above
Epithelial cells
A) cover body surfaces or form glands. B) usually have a free surface that is not in contact with other cells. C) have a basement membrane that attaches to underlying tissues. D) can be somewhat far away from a blood vessel. E) have all of these properties.