Which muscle extends the hip when walking and climbing?

a. gluteus maximums
b. biceps femoris
c. gastrocnemius
d. sartorius
e. quadriceps femoris


ANSWER: a

Biology & Microbiology

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If you were developing artificial B-cell receptors (BCRs) based on the natural version and wanted to change the BCRs' ability to bind certain antigens, which region of the natural receptor would you alter?

A) transmembrane domain B) amino terminus of light and heavy chains C) carboxy terminus of light and heavy chains D) the region projecting into the cytosol of the cell

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In which one of the following would one expect to find motor units made up of only a few muscle cells?

A) arm muscles B) eye muscles C) chest muscles D) thigh muscles E) lower-leg muscles

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The failure of a couple to achieve pregnancy after one year of regular, unprotected intercourse is called ____________

a. Memory loss b. Musculoskeletal problems c. Cancer d. Infertility

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The direct Coombs' test is designed to detect when people have a disease that causes them to

a. have an excessively high fever. b. quit making antibodies. c. make too many red blood cells. d. produce antibodies that bind to their own red blood cells.

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