Physiology (Bio 270) Exam 1 – JMU
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Homeostasis - correct answer ✔✔The maintenance of a relatively stable
environment
Essential for survival and function of cells
The function of homeostasis depends on...? - correct answer ✔✔Structure
The two components of extracellular fluid? - correct answer ✔✔plasma and
interstitial fluid
Level of body organization - correct answer ✔✔individual atoms (chemical level) --
> Cell (cellular level) --> tissue --> organs --> Body system (group of organs)
intrinsic control - correct answer ✔✔Signal from within the body
From within organ
Ex: Kidney pays attention to itself,
Extrinsic control - correct answer ✔✔Signal from outside the body
,From outside of organ
What is the last organ to be involved in being involved to regulate homeostatic
variables? - correct answer ✔✔The brain
Negative Feedback - correct answer ✔✔Brings you back to homeostatic set point
Positive Feedback - correct answer ✔✔Brings you further away from set point
When body temperature decreases, and your body temp. increases.......this is an
example of? - correct answer ✔✔Negative feedback
What are some type of negative feedback mechanisms to bring your body
temperature back to original value? - correct answer ✔✔Shiver, reduce surface
area, constrict blood vessels, etc.
What is the main mechanism your body uses to bring your body back to
homeostasis? - correct answer ✔✔Negative Feedback
Define dynamic steady state - correct answer ✔✔system which a particular
variable is not changing, but energy is needed to maintain the variable at a
constant set point
When you eat, you increase your blood glucose. Your pancreas releases insulin to
assist taking the glucose out of the blood. Then it is distributed to cells to carry
, out further function and decrease your blood glucose back to normal. This is an
example of.....? - correct answer ✔✔Negative Feedback
The integrating center compares variables to what in order to decide what the
effector organ should do? - correct answer ✔✔set point
When a woman is giving birth, the baby's head is pushing against the walls and
cervix. In order for the stretch receptors to continue to stretch, there is an
increase in oxytocin to increase the stretch. This is an example of what type of
feedback? - correct answer ✔✔Positive Feedback
Name a few of cell's functions. - correct answer ✔✔Obtaining oxygen and
nutrients from environment
Performing metabolic reactions
Eliminate waste
Synthesize proteins
Responding to environment
Reproducing
Moving material down axon to axon terminal
questions with verified answers already
passed
Homeostasis - correct answer ✔✔The maintenance of a relatively stable
environment
Essential for survival and function of cells
The function of homeostasis depends on...? - correct answer ✔✔Structure
The two components of extracellular fluid? - correct answer ✔✔plasma and
interstitial fluid
Level of body organization - correct answer ✔✔individual atoms (chemical level) --
> Cell (cellular level) --> tissue --> organs --> Body system (group of organs)
intrinsic control - correct answer ✔✔Signal from within the body
From within organ
Ex: Kidney pays attention to itself,
Extrinsic control - correct answer ✔✔Signal from outside the body
,From outside of organ
What is the last organ to be involved in being involved to regulate homeostatic
variables? - correct answer ✔✔The brain
Negative Feedback - correct answer ✔✔Brings you back to homeostatic set point
Positive Feedback - correct answer ✔✔Brings you further away from set point
When body temperature decreases, and your body temp. increases.......this is an
example of? - correct answer ✔✔Negative feedback
What are some type of negative feedback mechanisms to bring your body
temperature back to original value? - correct answer ✔✔Shiver, reduce surface
area, constrict blood vessels, etc.
What is the main mechanism your body uses to bring your body back to
homeostasis? - correct answer ✔✔Negative Feedback
Define dynamic steady state - correct answer ✔✔system which a particular
variable is not changing, but energy is needed to maintain the variable at a
constant set point
When you eat, you increase your blood glucose. Your pancreas releases insulin to
assist taking the glucose out of the blood. Then it is distributed to cells to carry
, out further function and decrease your blood glucose back to normal. This is an
example of.....? - correct answer ✔✔Negative Feedback
The integrating center compares variables to what in order to decide what the
effector organ should do? - correct answer ✔✔set point
When a woman is giving birth, the baby's head is pushing against the walls and
cervix. In order for the stretch receptors to continue to stretch, there is an
increase in oxytocin to increase the stretch. This is an example of what type of
feedback? - correct answer ✔✔Positive Feedback
Name a few of cell's functions. - correct answer ✔✔Obtaining oxygen and
nutrients from environment
Performing metabolic reactions
Eliminate waste
Synthesize proteins
Responding to environment
Reproducing
Moving material down axon to axon terminal
