A wide receiver for a college football team pulled a hamstring muscle. What muscles could be affected and what would the effect be?
What will be an ideal response
The muscles include the biceps femoris, semitendinosus, and semimembranosus. They are important flexors of the leg and extensors of the thigh. Injuries here could make it impossible to run properly or to extend the thigh.
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What is the major function of histones?
a) needed for helix formation of the DNA b) add negative charge to the DNA c) help organize coiling and folding of the DNA d) degrade faulty proteins in the nucleus e) catalyze methylation of the DNA
A muscle that assists another by preventing movement at another joint is called a(n)
A) synergist. B) fixator. C) agonist. D) prime mover. E) antagonist.
The plasma membrane:
a. is composed mostly of lipid molecules b. is composed mostly of protein molecules c. allows the ICF and ECF to easily exchange materials d. is a barrier that prevents most molecules from passing through e. is a very thick structure relative to the size of the cell
The average person has approximately ________ nephrons per kidney.
A. 3.6 million B. 2.4 million C. 5.6 million D. 4.8 million E. 1.2 million