Which of the following events at the electron-transport chain occurs last?
A. Hydrogen ions diffuse into inner mitochondrial compartment.
B. NADH transfer electrons to the electron-transport chain.
C. Hydrogen ions are moved from inner to outer mitochondrial compartment.
D. The movement of hydrogen ions through special channels is coupled to ATP production.
E. A hydrogen ion concentration gradient is established.
Answer: D
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A. septal defects B. fibrillation C. stenosis D. regurgitation
The anconeus works with the triceps brachii to
A. supinate the forearm. B. extend the forearm. C. pronate the forearm. D. flex the forearm. E. rotate the forearm.
Which of the following statements is the most correct regarding homeostatic imbalance?
A) It is considered the cause of most diseases. B) Positive feedback mechanisms are overwhelmed. C) Negative feedback mechanisms are functioning normally. D) The internal environment is becoming more stable.
Proteins that are embedded within and extend across the phospholipid bilayer are called ________ proteins.
A. cytoskeleton B. catalytic C. peripheral D. integral