HPHY 325 Midterm 1 Exam Questions
With Correct Answers
Organismal homeostasis mechanisms regulate variables in what
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environment? - CORRECT ANSWER✔✔-Within the fluid surrounding the
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cells as well as the plasma and the lymph
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What is true of only the endocrine system and not the nervous system?
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- CORRECT ANSWER✔✔-Hormones travel through the blood stream
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Homeostatically regulated variables always have a sensor (receptor) to
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monitor the environment and respond to changes outside the normal
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range - CORRECT ANSWER✔✔-True
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Neurotransmitters are most likely what type of chemical signal? - | | | | | | | | | |
CORRECT ANSWER✔✔-Paracrines |
Baroreceptors detect blood pressure. Blood pressure is maintained
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relatively constant even when the internal or external environment
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changes. Under what conditions do baroreceptors send signals to the
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brain? - CORRECT ANSWER✔✔-At all levels of blood pressures
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, What hormone mainly has its effect of target cells by activating genes
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and transcribing proteins? - CORRECT ANSWER✔✔-Thyroid hormone
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T3/T4
A ripe apple on a tree produces the molecule ethylene. This molecule
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causes the surrounding apples to ripen, and they in turn produce
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ethylene until all of the apples on the tree are ripe. What is this process
| | | | | | | | | | | | | | |
an example of? - CORRECT ANSWER✔✔-Positive feedback system
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Norepinephrine has many effects on the body, including vasodilation of | | | | | | | | | |
vessels. What is the molecular mechanism by which NE acts which this
| | | | | | | | | | | |
is achieved? - CORRECT ANSWER✔✔-NE, unable to cross the lipid
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belayer, binds to a membrane bound receptor G protein coupled
| | | | | | | | | |
receptor
When there is an increase in blood pressure, the medulla commands
| | | | | | | | | | |
the blood vessels to decrease peripheral resistance, in order to bring
| | | | | | | | | | |
MAP back to normal range. In this homeostatic mechanism, which of
| | | | | | | | | | |
the following is the effector? - CORRECT ANSWER✔✔-Blood vessels
| | | | | | | |
cAMP second messenger system enzymes, second messengers, and
| | | | | | | |
effects on the cells - CORRECT ANSWER✔✔-Adenylate cyclase, cAMP,
| | | | | | | | |
activates protein kinase | |
With Correct Answers
Organismal homeostasis mechanisms regulate variables in what
| | | | | | |
environment? - CORRECT ANSWER✔✔-Within the fluid surrounding the
| | | | | | |
cells as well as the plasma and the lymph
| | | | | | | | |
What is true of only the endocrine system and not the nervous system?
| | | | | | | | | | | |
- CORRECT ANSWER✔✔-Hormones travel through the blood stream
| | | | | | | |
Homeostatically regulated variables always have a sensor (receptor) to
| | | | | | | | |
monitor the environment and respond to changes outside the normal
| | | | | | | | | |
range - CORRECT ANSWER✔✔-True
| | |
Neurotransmitters are most likely what type of chemical signal? - | | | | | | | | | |
CORRECT ANSWER✔✔-Paracrines |
Baroreceptors detect blood pressure. Blood pressure is maintained
| | | | | | | |
relatively constant even when the internal or external environment
| | | | | | | | |
changes. Under what conditions do baroreceptors send signals to the
| | | | | | | | | |
brain? - CORRECT ANSWER✔✔-At all levels of blood pressures
| | | | | | | |
, What hormone mainly has its effect of target cells by activating genes
| | | | | | | | | | | |
and transcribing proteins? - CORRECT ANSWER✔✔-Thyroid hormone
| | | | | | |
T3/T4
A ripe apple on a tree produces the molecule ethylene. This molecule
| | | | | | | | | | | |
causes the surrounding apples to ripen, and they in turn produce
| | | | | | | | | | |
ethylene until all of the apples on the tree are ripe. What is this process
| | | | | | | | | | | | | | |
an example of? - CORRECT ANSWER✔✔-Positive feedback system
| | | | | | |
Norepinephrine has many effects on the body, including vasodilation of | | | | | | | | | |
vessels. What is the molecular mechanism by which NE acts which this
| | | | | | | | | | | |
is achieved? - CORRECT ANSWER✔✔-NE, unable to cross the lipid
| | | | | | | | | |
belayer, binds to a membrane bound receptor G protein coupled
| | | | | | | | | |
receptor
When there is an increase in blood pressure, the medulla commands
| | | | | | | | | | |
the blood vessels to decrease peripheral resistance, in order to bring
| | | | | | | | | | |
MAP back to normal range. In this homeostatic mechanism, which of
| | | | | | | | | | |
the following is the effector? - CORRECT ANSWER✔✔-Blood vessels
| | | | | | | |
cAMP second messenger system enzymes, second messengers, and
| | | | | | | |
effects on the cells - CORRECT ANSWER✔✔-Adenylate cyclase, cAMP,
| | | | | | | | |
activates protein kinase | |
