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PHSL 3051 Cell Neurophysiology Exam 1 Review exam(186 questions and answers).
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PHSL 3051 Cell Neurophysiology Exam 1 Review exam(186 questions and answers).
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PHSL 3051Cell/Neurophysio
logy Exam 1
Review
exam(186
questions and
answers)
What is homeostasis and how does it occur? -
answer - Homeostasis: the maintenance of
relatively stable conditions in the body's internal
environment
- Dynamic steady state
,-occurs through the operation of feedback
symptoms
What is integration? - answer occurs when several
components work together to accomplish a
particular function
What is an example of something regulated by
homeostasis? - answer blood pressure, body
temp, blood pH are regulated by homeostasis
What is an example of integration? - answer
breathing involves several organs of different
systems (lungs), (brain), (skeletal muscles)
What is mechanism of action? - answer -
Mechanism of action refers to the cause-and-effect
sequence that is used to describe a physiological
event
-the way that body function is explained
What is communication? - answer - A process of
providing information
- cells of the body communicate with one another
in order for the body to function
,What is an example of communication? - answer
the release of an extracellular chemical
messenger(a hormone, neurotransmitters, or a
local mediator
Describe the interrelationships between molecules,
cells, tissues, organs, and organ systems in the
human body. - answer -molecules combine to form
cells
-similar cells work together to form tissue and
perform a particular function
-an organ is a structure composed of two or more
types of tissues that are working together
-an organ system consists of related organs with a
common function
Describe the main components of a feedback
system. - answer -Stimulus: stimulates
-Receptors: monitors changes in a controlled
variable and sends input to a control center
, -Control Center: determines the narrow range or
set point within which a controlled variable should
be maintained, evaluates the input it receives from
receptors, and generates output commands when
they're needed
-Effectors: receives output from the control center
and produces a response or effect that changes the
controlled variable
-Response: the response the body does
What is negative feedback? - answer negative
feedback is designed to maintain relative
constancy (in a controlled variable)
What is an example of negative feedback? - answer
maintaining blood pressure (blood pressure drops,
negative feedback negates it to rise back to
normal)
What is positive feedback? - answer positive
feedback is designed to reinforce changes (in a
controlled variable)
What is an example of positive feedback? - answer
childbirth and blood clotting
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