Identify the different types of muscle fiber, and the differences between them.
What will be an ideal response?
Two main types of muscle fibers exist: slow-twitch (red) fibers and fast-twitch (white) fibers. Slow-twitch fibers have a greater capacity for aerobic work, while fast-twitch fibers have a greater capacity for anaerobic work, and produce more force. Fast-twitch fibers are important for quick and powerful movements commonly associated with strength-training activities.Training increases the functional capacity of both types of fiber. During muscular contraction, slow-twitch fibers always are recruited first. As the force and speed of muscle contraction increase, the relative importance of fast-twitch fibers goes up. In order to activate fast-twitch fibers, an activity must be intense and powerful.
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Which of the following is not a risk associated with too much exercise?
A. Weight loss B. Shortness of breath C. Undue fatigue D. Increased risk for injury E. Overtraining
Disinfection is:
A) a process that has the potential to transmit disease. B) the same as aseptic technique. C) using chemicals to clean items to remove as many microorganisms as possible. D) a sterile condition found in the operating room.
Demetrius is HIV positive and is being treated with highly active antiretroviral therapy. One of the agents he takes has caused his cheeks to sink, while fat accumulates on the back of his neck. He has also developed hyperlipidemia and diabetes mellitus. What class of drugs has this side effect profile?
A) fusion inhibitors B) nucleoside reverse transcriptase inhibitors C) antiretroviral protease inhibitors D) non-nucleoside reverse transcriptase inhibitors
Posttraumatic stress disorder (PTSD) is a condition that develops in people who have experienced or witnessed an extreme psychological or physical event that is interpreted as distressing.
Answer the following statement true (T) or false (F)