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PHSL 3051 Quiz Questions Spring 2024 with 100- correct answers(GUARANTEED SUCCESS)
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PHSL 3051 Quiz Questions Spring 2024 with 100- correct answers(GUARANTEED SUCCESS)
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PHSL 3051 QuizQuestions Spring 2024
with 100% correct
answers(GUARANTEED
SUCCESS)
Why did we use NaOH in our diffusion
experiments? - answer Because diffusion of OH
ions into the tubes will cause phenolphthalein to
change color
What did we learn about the rate of diffusion in a
liquid in our experiments? - answer the rate of
diffusion was faster in the dish with the higher
concentration of NaOH
Using the data you acquired from the tube in the
dish containing 0.05 M NaOH, about how long did
you predict it would take for glucose absorbed in
the gut to diffuse to muscles in your foot (i.e. 1
meter)? - answer hundreds of thousands of
minutes (a year or more)
,When we go outside without adequate clothing on
a winter day, the cold temperature that we feel on
our skin may cause us to start to shiver in order to
prevent a drop in our core body temperature. What
kind of control system is responsible for this
response? - answer a feedforward system
What is the purpose of a negative feedback
system? - answer To maintain a parameter at a
relatively constant level
A person arrived at the emergency room with a
stab wound in their back. An MRI showed that one
of their dorsal roots was severed. How would the
patient present upon a neurological examination? -
answer They would have lost all sensation in the
corresponding body part.
In which one of the following ways is a primary
sensory neuron different from a motor neuron? -
answer It is part of the afferent division of the
peripheral nervous system.
A stroke is an event that causes neurons to die due
to lack of oxygen.
A stroke in which one of the following brain regions
would be more likely to be fatal? - answer
brainstem
,Which of the following is an example of diffusion? -
answer Movement of oxygen from the lung into
the blood
Multipolar neurons like motoneurons are
functionally polarized. How does the function of
the dendrites differ from that of the axon? - answer
Dendrites receive inputs whereas axons are the
output structures of the neuron
Why did red blood cells burst when they were
placed in an iso-osmotic solution of ethanol? -
answer Because there was zero mOSM non-
penetrating solutes in the solution.
What determines the direction that ions will move
through ion channels? - answer Both the ion's
concentration gradient and the electrical gradient
across the plasma membrane
Which of the following is true about leak channels?
- answer They open and close randomly.
What will determine the membrane potential of a
neuron at any given time? - answer Which type of
channels are open, and how many of each are open
, What is the role of the Na/K ATPase in regard to
the resting membrane potential? - answer It
maintains the Na and K concentration gradients
across the plasma membrane.
Intestinal epithelial cells have secondary active
transporters that bring both Na and glucose across
the luminal membrane into their cytoplasm. They
also have water channels on their luminal
membrane. How do these cells control the
movement of water from the lumen into their
cytoplasm? - answer By regulating the
concentration gradients of charged and/or large
solute molecules
Which one of the following statements about the K
and Na concentration gradients between ECF and
ICF is true? - answer The K concentration gradient
is larger than the Na concentration gradient
What determines the size of a receptor potential? -
answer The number of transduction channels that
are opened by the stimulus.
Which of the following at least partly determines
what kind of stimulus will activate a sensory
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