UCONN PNB 2264 Exam 1 Questions
and Answers 100% Pass
Structure/function relationship - ✔✔Structure is adapted to function
Hierarchy of Organization - ✔✔structure is adapted to function
Homeostasis - ✔✔Not an equilibrium, rather a "dynamic steady state or dynamic
constancy"
within narrow limits around the set point
Body Fluid Compartments - ✔✔Intracellular fluid (67%)
Extracellular fluid
interstitial fluid (26%)
blood plasma (7%)
Definition of Homeostasis - ✔✔Dynamic steady state of conditions in the body
(especially the extracellular fluid)
Components of a Control System - ✔✔Physiological variable
Set point/normal range (set by controller)
Katelyn Whitman, All Rights Reserved © 2025 1
, Sensor/receptor
Integrating (control) center- compares to set point, programs response
Effector (carries out response)
Closed Loop Negative Feedback - ✔✔Change in body temperature if the room
temperature decreases
Negative because the response returns regulated variable toward set point (response
removes the stimulus)
Hormone - ✔✔Target cells in one or more distant places in the body
Neurotransmitter - ✔✔Neuron or effector cell in close proximity to site of
neurotransmitter release
Paracrine substance - ✔✔target cells in close proximity to site of release of paracrine
substance
Autocrine substance - ✔✔autocrine substance acts on same cell that secreted the
substance
Closed loop, positive feddback - ✔✔response of the effector reinforced the stimulus
ex. blood clotting
Bad positive feedback - ✔✔cardiogenic shock
Katelyn Whitman, All Rights Reserved © 2025 2
and Answers 100% Pass
Structure/function relationship - ✔✔Structure is adapted to function
Hierarchy of Organization - ✔✔structure is adapted to function
Homeostasis - ✔✔Not an equilibrium, rather a "dynamic steady state or dynamic
constancy"
within narrow limits around the set point
Body Fluid Compartments - ✔✔Intracellular fluid (67%)
Extracellular fluid
interstitial fluid (26%)
blood plasma (7%)
Definition of Homeostasis - ✔✔Dynamic steady state of conditions in the body
(especially the extracellular fluid)
Components of a Control System - ✔✔Physiological variable
Set point/normal range (set by controller)
Katelyn Whitman, All Rights Reserved © 2025 1
, Sensor/receptor
Integrating (control) center- compares to set point, programs response
Effector (carries out response)
Closed Loop Negative Feedback - ✔✔Change in body temperature if the room
temperature decreases
Negative because the response returns regulated variable toward set point (response
removes the stimulus)
Hormone - ✔✔Target cells in one or more distant places in the body
Neurotransmitter - ✔✔Neuron or effector cell in close proximity to site of
neurotransmitter release
Paracrine substance - ✔✔target cells in close proximity to site of release of paracrine
substance
Autocrine substance - ✔✔autocrine substance acts on same cell that secreted the
substance
Closed loop, positive feddback - ✔✔response of the effector reinforced the stimulus
ex. blood clotting
Bad positive feedback - ✔✔cardiogenic shock
Katelyn Whitman, All Rights Reserved © 2025 2
