Select the three muscles that compose the hamstrings and flex the leg.
A. Biceps femoris, semimembranosus, semitendinosus
B. Biceps femoris, vastus medialis, semitendinosus
C. Biceps femoris, gracilis, sartorius
D. Biceps femoris, rectus femoris, semitendinosus
Answer: A
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The superior surface of the talus articulating with the tibia is the head.
Answer the following statement true (T) or false (F)
Transverse tubules
A) transmit muscle impulses into the cell interior. B) connect actin and myosin. C) store sodium ions for the action potential at the cell surface. D) store calcium ions.
Answer the following statements true (T) or false (F)
1. Carbonic anhydrase turns water and carbon dioxide into carbonic acid. 2. A buffer is a substance that prevents a sharp change in the pH of a solution when an acid or base is added. 3. Metabolic processes tend to produce more bases than acids. 4. A common buffer pair is sodium bicarbonate and carbonic acid. 5. If the sodium bicarbonate-carbonic acid buffer pair were to buffer a solution of HCl, more carbonic acid would be formed.
Of the following substances, which has the greatest potential to cause dependence if used regularly?
A. nicotine B. marijuana C. alcohol D. cocaine E. heroin