An Olympic Sprinter Readies for a Race

question 36

Multiple Choice

An Olympic sprinter readies for a race.After the sound of the starting gun, he propels himself forward from the starting block and immediately grimaces in pain, grabbing for the back of his thigh.Within
48 hours he begins noticing extensive bruising on the back of his thigh extending into the back of the knee.He now has difficulty rising from a seated position and flexing his knee.Bending at the waist generates more pain.Which muscle is likely injured?

• A)gluteus maximus
• B)popliteus
• C)biceps femoris
• D)gastrocnemius
• E)iliopsoas

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Definitions:

Chorion

The outermost membrane enclosing the embryo in eggs of birds, reptiles, and mammals.

Early Prenatal Diagnosis

The practice of detecting congenital disorders or diseases in a fetus early in pregnancy.

Placenta

An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the fetus while removing waste products via the maternal blood supply.

X-linked Recessive

A mode of inheritance where a recessive gene on the X chromosome causes a phenotype to be expressed primarily in males.