e) tricuspid valve
3) accelerated closure of the epiphyseal plates could be caused by
a) high levels of vitamin d.
b) too much calcium in the diet.
c) elevated levels of estrogen.
d) too little thyroxine.
e) an excess of growth hormone.
4) during deglutition, which of the following phases is not present?
a) buccal
b) pharyngeal
c) gastric
d) esophageal
e) none of the answers are correct.
5) alzheimer disease is characterized by all of the following, except that it
a) is the most common cause of senile dementia.
b) is characterized by a progressive loss of memory.
c) has a clear genetic basis.
d) is associated with the formation of plaques and neurofibrillary tangles.
e) may be associated with damage to the nucleus basalis.
6) helium (he) has an atomic number of 2. it is chemically stable because it
a) is neutral in electrical charge.
b) readily ionizes to react with other atoms.
c) has a full outer electron shell.
d) will form a covalent bond with another he atom.
e) lacks electrons, thus the he atom is stable.