Tetanus occurs when a muscle fiber is stimulated so rapidly that it is not allowed to relax between stimulations, resulting in a smooth, sustained contraction
Indicate whether the statement is true or false
T
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The lever system at the elbow joint provides a mechanical advantage so that when the biceps muscle contracts to flex the elbow joint and lift an object in the hand, the force developed in the biceps can be considerably less than the actual load that is moved
Indicate whether the statement is true or false
What produces "goose bumps"?
A. Dilation of cutaneous blood vessels B. Secretion of sweat C. Contraction of the arrector pili muscle D. Flow of sebum onto the skin
In an effort to impress her physiology instructor, your roommate did an Internet search on cortisol. In her exuberance, she failed to read the book chapter, the instructor has not yet lectured on this chapter, and frankly she knows next to nothing about this hormone. She discovers such seemingly unrelated therapeutic effects as treatment for bee stings and rejection of transplanted organs. You,
however, completed your physiology course last semester, and she turns to you for enlightenment. What can you tell her about some other therapeutic uses for cortisol, and what functional connections do these illustrate? What are some of the negative side effects? What will be an ideal response?
Define hemostasis and describe its three phases
What will be an ideal response?