Hemophilia is caused by an abnormal gene on ________
A) the Y chromosome carried by the father
B) factor VIII in the blood
C) the X chromosome carried by the mother
D) cancerous lymphocytes in the blood
C
Explanation: A) The hemophilia gene is not on the Y chromosome.
B) Factor VIII does not have any genes.
C) Correct!
D) Cancerous lymphocytes are not related to hemophilia.
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amastia : _______ of breast tissue, although areola and nipple are present
Fill in the missing word in the definition for the key term.
What is unusual about endocannabinoids or endogenous cannabinoids? Choose the correct option
A) They are retrograde messengers by which postsynaptic neurons act on presynaptic terminals. B) They play an important role in the brain systems that regulate mood. C) They contain a chemical structure called catechol. D) They float in the membrane like adenylyl cyclase.
Possible causes of mental illness include _____.
A. childrearing practices B. heredity C. biochemical imbalances D. all of these are correct
Educational gymnastics programs are designed to
A. teach children to take risks. B. provide children with a foundation of gymnastics experiences. C. increase their knowledge about stunts and tumbling skills. D. assist those few children who are developmentally ready for the challenge of gymnastics.