Medical Physiology PHSL 1010 Exam 2
Questions With Correct Answers
T-tubules |(triads) |- |CORRECT |ANSWER✔✔-Depolarizing |currents |pass |to |the |sarcoplasmic |
reticulum |via:
Troponin |- |CORRECT |ANSWER✔✔-The |muscle |protein |that |binds |to |Ca++ |during |excitation-
contraction |coupling |is:
One |muscle |cell |only |- |CORRECT |ANSWER✔✔-A |skeletal |muscle |fiber |comprises:
Slow-twitch |fibers |have |more |myoglobin |than |fast-twitch |AND |Slow-twitch |fibers |are |more |
fatigue-resistant |than |fast-twitch |- |CORRECT |ANSWER✔✔-Fast-twitch |muscle |fibers |differ |from
|slow-twitch |fibers |in |which |way(s)?
Smooth |muscle |cells |have |only |one |nucleus |AND |Smooth |muscle |contracts |more |slowly |than |
skeletal |muscle |- |CORRECT |ANSWER✔✔-Smooth |muscle |differs |from |skeletal |muscle |in |which |
way(s)?
Z |lines |(from |striated |[cardiac |& |skeletal] |muscles) |- |CORRECT |ANSWER✔✔-Smooth |muscle |
dense |bodies |perform |a |similar |function |to:
Inside |sheets |of |smooth |muscle |- |CORRECT |ANSWER✔✔-Parasympathetic |ganglia |that |aid |in |
control |of |smooth |muscle |contraction |are |located:
, Ca++ |enters |the |cell, |Ca++ |binds |to |calmodulin, |myosin |heads |are |phosphorylated, |myosin |
binds |to |actin |- |CORRECT |ANSWER✔✔-The |correct |sequence |of |events |in |smooth |muscle |
contraction |is:
Cardiac |muscle |cells |have |only |one |nucleus |and |are |branched |- |CORRECT |ANSWER✔✔-Cardiac
|muscle |differs |from |skeletal |muscle |in |which |way(s)?
Both |serve |as |the |insertion |point |for |cardiac |muscle |cells |and |contain |numerous |gap |junctions |
and |desmosomes |- |CORRECT |ANSWER✔✔-Intercalated |disks:
Is |both |limited |by |parasympathetic |activity |and |is |similar |to |that |seen |in |skeletal |muscle |- |
CORRECT |ANSWER✔✔-Excitation-contraction |coupling |in |cardiac |muscle:
Are |characterized |by |a |broad |plateau |as |Ca++ |enters |the |cell |- |CORRECT |ANSWER✔✔-Action |
potentials |in |cardiac |muscle |cells:
Gap |junctions |- |CORRECT |ANSWER✔✔-Depolarizing |signals |pass |through |the |atrial |
musculature |via:
Closure |of |the |mitral |valve |AND |Closure |of |the |tricuspid |valve |- |CORRECT |ANSWER✔✔-The |
first |"heart |sound" |is |made |by:
Atrial |diastole |- |CORRECT |ANSWER✔✔-The |greatest |blood |pressure |is |achieved |at:
Anchor |the |leaflets |of |the |A-V |valves |AND |Are |inserted |into |the |ventricular |musculature |- |
CORRECT |ANSWER✔✔-Papillary |muscles:
Varies |with |heart |rate |(and |stroke |volume) |- |CORRECT |ANSWER✔✔-Cardiac |output:
Questions With Correct Answers
T-tubules |(triads) |- |CORRECT |ANSWER✔✔-Depolarizing |currents |pass |to |the |sarcoplasmic |
reticulum |via:
Troponin |- |CORRECT |ANSWER✔✔-The |muscle |protein |that |binds |to |Ca++ |during |excitation-
contraction |coupling |is:
One |muscle |cell |only |- |CORRECT |ANSWER✔✔-A |skeletal |muscle |fiber |comprises:
Slow-twitch |fibers |have |more |myoglobin |than |fast-twitch |AND |Slow-twitch |fibers |are |more |
fatigue-resistant |than |fast-twitch |- |CORRECT |ANSWER✔✔-Fast-twitch |muscle |fibers |differ |from
|slow-twitch |fibers |in |which |way(s)?
Smooth |muscle |cells |have |only |one |nucleus |AND |Smooth |muscle |contracts |more |slowly |than |
skeletal |muscle |- |CORRECT |ANSWER✔✔-Smooth |muscle |differs |from |skeletal |muscle |in |which |
way(s)?
Z |lines |(from |striated |[cardiac |& |skeletal] |muscles) |- |CORRECT |ANSWER✔✔-Smooth |muscle |
dense |bodies |perform |a |similar |function |to:
Inside |sheets |of |smooth |muscle |- |CORRECT |ANSWER✔✔-Parasympathetic |ganglia |that |aid |in |
control |of |smooth |muscle |contraction |are |located:
, Ca++ |enters |the |cell, |Ca++ |binds |to |calmodulin, |myosin |heads |are |phosphorylated, |myosin |
binds |to |actin |- |CORRECT |ANSWER✔✔-The |correct |sequence |of |events |in |smooth |muscle |
contraction |is:
Cardiac |muscle |cells |have |only |one |nucleus |and |are |branched |- |CORRECT |ANSWER✔✔-Cardiac
|muscle |differs |from |skeletal |muscle |in |which |way(s)?
Both |serve |as |the |insertion |point |for |cardiac |muscle |cells |and |contain |numerous |gap |junctions |
and |desmosomes |- |CORRECT |ANSWER✔✔-Intercalated |disks:
Is |both |limited |by |parasympathetic |activity |and |is |similar |to |that |seen |in |skeletal |muscle |- |
CORRECT |ANSWER✔✔-Excitation-contraction |coupling |in |cardiac |muscle:
Are |characterized |by |a |broad |plateau |as |Ca++ |enters |the |cell |- |CORRECT |ANSWER✔✔-Action |
potentials |in |cardiac |muscle |cells:
Gap |junctions |- |CORRECT |ANSWER✔✔-Depolarizing |signals |pass |through |the |atrial |
musculature |via:
Closure |of |the |mitral |valve |AND |Closure |of |the |tricuspid |valve |- |CORRECT |ANSWER✔✔-The |
first |"heart |sound" |is |made |by:
Atrial |diastole |- |CORRECT |ANSWER✔✔-The |greatest |blood |pressure |is |achieved |at:
Anchor |the |leaflets |of |the |A-V |valves |AND |Are |inserted |into |the |ventricular |musculature |- |
CORRECT |ANSWER✔✔-Papillary |muscles:
Varies |with |heart |rate |(and |stroke |volume) |- |CORRECT |ANSWER✔✔-Cardiac |output:
