BIOCHEM C785 TEST BANK COMPLETE
QUESTIONS AND ANSWERS 100% CORRECT
◍ Which of the following is a true statement about how living
organisms use energy and chemicals to carry out life's activities?
A )Energy cycles within an ecosystem, but chemicals flow through it.
B) Both energy and chemicals flow through an ecosystem.
C) Both energy and chemical cycle within an ecosystem.
D) Energy flows through an ecosystem, but the chemicals cycle
within it.. Answer: D) Energy flows through an ecosystem, but the
chemicals cycle within it
◍ Iodine is a trace element. Do you think it is also an essential
element? Explain your reasoning.. Answer: Even though iodine is
required in very small amounts, it is necessary to produce thyroid
hormones. Because the body requires iodine but cannot produce it, it
is an essential element.
◍ Nicholas's surgical team used chlorhexidine as an antiseptic to
prepare his skin for incision. Chlorhexidine is increasingly used in
place of betadine, which contains iodine. Small amounts of iodine
from betadine are absorbed by the body. Explain why the use of
chlorhexidine as an antiseptic may be linked with an uptick in
hypothyroidism among patients with short bowel syndrome.. Answer:
Patients with short bowel syndrome are likely to have multiple
surgical procedures. When surgeons used betadine, some iodine was
, likely absorbed and could be used by the patients' thyroids to make
thyroid hormones. Chlohexidine does not provide this essential
element, and the patients' nutrition is compromised due to their
condition. Therefore, patients are more likely to have iodine
deficiencies. This iodine deficiency leads to low levels of thyroid
hormones (hypothyroidism).
◍ matter. Answer: Anything that has mass and takes up space
◍ element. Answer: a substance that cannot be separated or broken
down into simpler substances by chemical means
◍ compound. Answer: a substance consisting of two or more different
elements combined in a fixed ratio
◍ essential elements. Answer: A chemical element required for an
organism to survive, grow, and reproduce.
only 92 natural elements-20-25%
◍ trace elements. Answer: required by an organism in only minute
quantities
◍ atom. Answer: Smallest particle of an element
◍ neutron. Answer: found in the nucleus
neutral charged
QUESTIONS AND ANSWERS 100% CORRECT
◍ Which of the following is a true statement about how living
organisms use energy and chemicals to carry out life's activities?
A )Energy cycles within an ecosystem, but chemicals flow through it.
B) Both energy and chemicals flow through an ecosystem.
C) Both energy and chemical cycle within an ecosystem.
D) Energy flows through an ecosystem, but the chemicals cycle
within it.. Answer: D) Energy flows through an ecosystem, but the
chemicals cycle within it
◍ Iodine is a trace element. Do you think it is also an essential
element? Explain your reasoning.. Answer: Even though iodine is
required in very small amounts, it is necessary to produce thyroid
hormones. Because the body requires iodine but cannot produce it, it
is an essential element.
◍ Nicholas's surgical team used chlorhexidine as an antiseptic to
prepare his skin for incision. Chlorhexidine is increasingly used in
place of betadine, which contains iodine. Small amounts of iodine
from betadine are absorbed by the body. Explain why the use of
chlorhexidine as an antiseptic may be linked with an uptick in
hypothyroidism among patients with short bowel syndrome.. Answer:
Patients with short bowel syndrome are likely to have multiple
surgical procedures. When surgeons used betadine, some iodine was
, likely absorbed and could be used by the patients' thyroids to make
thyroid hormones. Chlohexidine does not provide this essential
element, and the patients' nutrition is compromised due to their
condition. Therefore, patients are more likely to have iodine
deficiencies. This iodine deficiency leads to low levels of thyroid
hormones (hypothyroidism).
◍ matter. Answer: Anything that has mass and takes up space
◍ element. Answer: a substance that cannot be separated or broken
down into simpler substances by chemical means
◍ compound. Answer: a substance consisting of two or more different
elements combined in a fixed ratio
◍ essential elements. Answer: A chemical element required for an
organism to survive, grow, and reproduce.
only 92 natural elements-20-25%
◍ trace elements. Answer: required by an organism in only minute
quantities
◍ atom. Answer: Smallest particle of an element
◍ neutron. Answer: found in the nucleus
neutral charged
