How could x-rays of the femur be used to determine whether a person has reached full height?
What will be an ideal response?
X-rays of long bones, such as the femur, can reveal the presence or absence of the epiphyseal cartilage, which separates the epiphysis from the diaphysis so long as the bone is still lengthening. If the epiphyseal cartilage is present, growth is still occurring; if it is not present, the bone has reached its full length, and thus the person has reached his or her full height.
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Central venous blood pressure:
a. can be almost zero in the inferior vena cava b. is usually 120 mm Hg during systole c. is usually 80 mm Hg during diastole d. both B and C above
Two lobes form the left lung, and ________ lobes form the right lung. (Note: Be sure to spell out your answer).
Fill in the blank(s) with the appropriate word(s).
Which of the following nonspecific responses is characterized by the use of C3, properdin, factor B, and factor D?
a. physical barriers b. immunosurveillance c. complement, classical pathway d. complement, alternative pathway
Spermatogenesis and testosterone production are interdependent events, meaning that neither process can occur without the other
Indicate whether the statement is true or false.