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1.
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Which of the following is an example of sensors working during
homeostasis?
a. | energy demands triggering a release of glucose | b. | the pancreas failing
to release insulin | c. | blood volume decreasing from lack of
water | d. | acidic blood pH disrupting cell metabolism |
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2.
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Each organ system coordinates with other organ systems through
a. | chemical and nerve messages. | b. | connective and muscular
tissue. | c. | their stem cells. | d. | identical sensors and
targets. |
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3.
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The body works to maintain homeostasis in response to what conditions?
a. | internal and external changes | b. | production of key vitamins | c. | cell differentiation
and determination | d. | tissue and cell
formation |
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4.
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Which of the following organ systems interact to regulate the level of vitamin D
produced in your body?
a. | integumentary and skeletal | b. | endocrine and skeletal | c. | endocrine and
circulatory | d. | respiratory and circulatory |
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5.
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How does the liver help to regulate glucose levels in the blood?
a. | by excreting excess water | b. | by producing insulin | c. | by releasing
glucagon | d. | by storing glucose |
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6.
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When cells do not continue to develop into specialized cells, they
undergo
a. | determination. | b. | homeostasis. | c. | apoptosis. | d. | differentiation. |
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7.
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When you hold your breath, sensors in the blood vessels detect lower oxygen
levels. The brain stem receives the information and sends messages through the nervous and endocrine
systems to the muscles of the diaphragm, forcing you to breathe. Which part of this feedback loop
would be considered the control center?
a. | the brain stem | b. | the endocrine system | c. | oxygen in the
blood | d. | muscles of the diaphragm |
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8.
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Which of the following organs acts as the control center in thermoregulation of
the body?
a. | pancreas | b. | hypothalamus | c. | liver | d. | kidneys |
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9.
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What is another way of describing what happens to your body when you have a
cold?
a. | vitamin D deficiency | b. | short-term disruption of
homeostasis | c. | homeostatic mechanism destruction | d. | immune system
damage |
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10.
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On a hot day, which of the following is an outward sign that thermoregulation is
taking place?
a. | sweating | b. | sunburn | c. | slow
breathing | d. | dry mouth |
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11.
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What two organ systems provide communication in thermoregulation?
a. | nervous and endocrine | b. | circulatory and
integumentary | c. | integumentary and muscular | d. | respiratory and
nervous |
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12.
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During childbirth, a woman's body produces oxytocin, which causes the
uterus to contract. To maintain the contractions, more oxytocin is produced until the baby is
born. This is an example of
a. | cell death. | b. | positive feedback. | c. | thermoregulation. | d. | sensor failure. |
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13.
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How does a positive feedback loop respond to changing conditions?
a. | It reduces any change that overwhelms a set point. | b. | It increases a
change away from a set point. | c. | It counteracts a variation from a set
point. | d. | It changes a set point to match current conditions. |
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14.
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If homeostasis were disrupted, all of the following would occur
except
a. | the heart would immediately stop pumping blood. | b. | enzymes would be
inactivated. | c. | body temperature would not be maintained. | d. | strenuous physical
activity would be difficult. |
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15.
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Several organs must work together to produce vitamin D. If one organ is not
working well, the body makes less of this vitamin. Which organ system would suffer most from a lack
of vitamin D?
a. | circulatory | b. | skeletal | c. | integumentary | d. | endocrine |
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16.
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The long-term effects of a disruption of homeostasis include
a. | establishment of feedback mechanisms. | b. | destruction of organ
systems. | c. | the immune system takes control. | d. | regulation of the internal
environment. |
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