Although two breast cancer genes are known, most cases are nonhereditary
Indicate whether the statement is true or false
TRUE
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A myofibril is the
A. cell membrane of a muscle fiber. B. cytoplasm of muscle cells. C. structural and functional unit of the skeletal muscle cell. D. contractile thread that extends the length of the muscle fiber. E. protein strand composed of actin.
Hormones are normally secreted via ducts into the bloodstream
Indicate whether the statement is true or false
This figure shows a posterior view of the organs of the female reproductive system. Which number indicates the suspensory ligament?
A. 1 B. 2 C. 3 D. 4 E. 5
Vasoconstriction
a. refers to a decrease in the radius of a vessel b. of an arteriole decreases blood flow through that vessel c. of a vein increases blood flow through that vessel d. is defined in "a" and causes "b" e. is defined in "a" and causes "c"