Trisomy 21 is the clinical term for
A) Marfan's syndrome.
B) Klinefelter syndrome.
C) amyotrophic lateral sclerosis.
D) fetal alcohol syndrome.
E) Down syndrome.
Answer: E
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In the flat skull bones, the middle spongy layer of bone sandwiched between two layers of compact bone is called the __________.
Fill in the blank(s) with the appropriate word(s).
Jane has Type A blood; therefore, she
A) has antibodies to B agglutinogens. B) can give blood to other people with Type A blood only. C) can receive blood from other people with Type A blood only. D) makes anti-A without ever having been exposed to Type A blood. E) has B antigen on her RBCs.
Prior to puberty, testosterone ________ GnRH secretion.
A. inhibits B. promotes C. has no effect on D. catalyzes
A long bone forms by a process known as ________ ossification.
Fill in the blank(s) with the appropriate word(s).