lab exam 2 Flashcards
is cardiac muscle neurogenic or myogenic
myogenic
what is the difference beween a neurogenic muscle and a myogenic muscle?
neurogenic- nervous system initiates
myogenic- self generating
if cardiac muscle were suddenly under the influence of the sympathetic nervous system, heart rate would _______ and contraction force would _______
increase
would you find greater concentration of sodium ions inside or outside of a cardiac muscle cell
outside
in the cardiac muscle lab what solution was used to keep the frog heart moist
ringers solution
if cardiac muscle were suddenly under the influence of the parasympathetic nervous system, heart rate would _______ and contraction force would _______
decrease
would you find greater concentration of potassium ions inside or outside of a cardiac muscle cell
inside
in the cardiac muscle lab an ___ inch fish hook was used
18
in the cardiac muscle lab the fishhook is placed on a ___ angle
right
in the cardiac muscle lab when reading the heart rate the first bump is the ____________ and the second bump is the _______________
atrial contraction
ventricle contraction
in the cardiac muscle lab when added norepinephrine the heart rate ______ and the rate/force ________
increases, increases
in the cardiac muscle lab when added acetylcholine the heart rate ______ and the rate/force ________
decreases, decreases
in the cardiac muscle lab when added atropine the heart rate ______ and the rate/force ________
increases, increases
in the cardiac muscle lab when added NaCl the heart rate ______ and the rate/force ________
increases, increases
in the cardiac muscle lab when added KCl the heart rate ______ and the rate/force ________
decreases, decreases
in the cardiac muscle lab when added calcium chloride the heart rate ______ and the rate/force ________
decreases, increases
in the cardiac muscle lab the ______ of the heart is removed
pericardium
in the cardiac muscle lab how do you figure out beats per minute when reading heart rate
60 seconds divided by wave duration
in the cardiac muscle lab how do you calculate wave duration
M marker at the peak of the wave, cursor at the next peak
in the cardiac muscle lab how do you measure contraction force
M marker at the base of the wave, cursor at the peak
in the cardiac muscle lab under what conditions will norepinephrine be released
sympathetic
in the cardiac muscle lab what is the effect of norepinephrine on heart rate and contractility
they will go up
in the cardiac muscle lab under what types of conditions will ACh be released
parasympathetic
in the cardiac muscle lab what is the effect of ACh on heart rate and contractility
they will go down
in the cardiac muscle lab what is the effect of atropine on heart rate and contractility
they will go up
in the cardiac muscle lab how does excess sodium effect the heart
rate and contractility go up
in the cardiac muscle lab how does excess potassium effect the heart
rate and contractility go down
in the cardiac muscle lab how does excess calcium effect the heart
rate goes down and contractility goes up
in the cardiac muscle lab what occurred when epinephrine was added to the frogs heart?
when epinephrine was added to the frogs heart, the heart rate (beats per minute) increased. However, atrial wave amplitude and ventricular wave amplitude decreased.
in the cardiac muscle lab what happened when acetylcholine was added to the frogs heart?
when ACh was added to the frogs heart the heart rate (bpm) decreased, as did the atrial wave amplitude. Note, ventricular wave amplitude increased as a result of adding ACh.
in the cardiac muscle lab what happened when atropine was added to the frogs heart?
when atropine was added to the frogs heart, heart rate increased ( beats per minute). however, atrial wave and ventricular wave decreased.
in the cardiac muscle lab on a cellular level what is the mode of action of atropine?
atropine blocks the action of the Vagus nerve. Atropine is an antagonist of Acetylcholine.
In the intestinal motility lab when norepinephrine is added to the gut, the activity _______
decreases
In the intestinal motility lab when ACH is added to the gut, the activity _______
increases
In the intestinal motility lab when atropine is added to the gut, the activity _______
decreases
what type of muscle is found within the walls of the small intestine
smooth
is the muscle within the wall of the small intestine myogenic, neurogenic or both
both. myogenic because they move on their own and neurogenic because they respond to autonomic nervous system
name the two types of motility seen in the small intestine
peristalsis ( wave like propulsion, push forward)
segmentation (shaking/mixing)
would you expect motility to increase or decrease if the small intestine were being stimulated by the sympathetic nervous system
decrease
what kind of intestine was used In the intestinal motility lab
rat
In the intestinal motility lab what is the solution used to keep the intestine saturated
tyrode
In the intestinal motility lab what is the ideal temperature because it mimic body temp
37 degrees C
would you expect motility to increase or decrease if the small intestine were being stimulated by the parasympathetic nervous system
increase
In the intestinal motility lab what chemicals were used
norepinephrine, acetylcholine, atropine
In the intestinal motility lab what is used to keep the temperature
alcohol lamp
In the intestinal motility lab temperatures must be between ______ to keep the intestine alive
36-39 degrees C
In the intestinal motility lab how do you determine duration of a wave
M marker at the peak of a wave and cursor at the next peak
In the intestinal motility lab how do you calculate contractions per minute
divide 60 by the duration
In the intestinal motility lab how do you determine amplitude of a wave
M marker at base, cursor at peak
In the intestinal motility lab Rhythmic Contractions of Intestinal Muscle are initiated by
Rhythmic Contractions of Intestinal Muscle are initiated by
In the intestinal motility lab Epinephrine on gut muscle
Decreased Motility/ Slowed Down Contraction of Intestine
In the intestinal motility lab ACH (Acetylcholine) on gut muscle
Increased Motility/ Speeds Up Contraction of Intestine, Increased secretions
In the intestinal motility lab what are these contractions called
Peristalsis
In the intestinal motility lab Atropine on gut muscle
Decreased, Slows down contractions (ACh antagonist)
In the intestinal motility lab What occurs to gut muscle during exercise
Sympathetic stimulation which releases neurotransmitter Epinephrine this causes an increase in heart rate and a decrease in intestinal motility (gut activity). Parasympathetic activity is inhibited.
In the intestinal motility lab What occurs to gut muscle during rest
Parasympathetic stimulation which releases neurotransmitter ACh (Acteylcholine) causing a decrease in heartrate and an increase in intestinal motility (gut activity). Sympathetic activity is inhibited.
In the intestinal motility lab Explain Atropine’s effect on the gut muscle
Blocks the effect of ACh.
in the electrocardiogram lab the ____ is an indirect measurement of the electrical activity of the heart. Electrical changes which occur during depolarization and repolarization of the heart are amplified and displayed in a graphic record
ECG
in the electrocardiogram lab is it electrical or mechanical if SA node autorhythmically depolarizes
electrical
in the electrocardiogram lab is it electrical or mechanical if wave of depolarization spreads through the cardiac muscle cells of the atria
electrical
in the electrocardiogram lab is it electrical or mechanical if atrial muscle cells contract
mechanical
in the electrocardiogram lab is it electrical or mechanical if action potential is delayed at the AV node
electrical
in the electrocardiogram lab is it electrical or mechanical if depolarization moves through the bundle of his and the purkinje fibers
electrical
in the electrocardiogram lab is it electrical or mechanical if wave of depolarization spreads through the cardiac muscle cells of the ventricle
electrical
in the electrocardiogram lab is it electrical or mechanical if ventricular muscle cells contract
mechanical
in the electrocardiogram lab what does the P wave represent
atrial depolarization
in the electrocardiogram lab what does the QRS complex represent
ventricular depolarization or atrial repolarization
in the electrocardiogram lab what does the T wave represent
ventricular repolarization
in the electrocardiogram lab 1 large square = ____ small squares and ____ seconds
5 squares, 0.2 seconds
in the electrocardiogram lab 5 large square = ____ seconds
one second
in the electrocardiogram lab 30 large square = ____ second
6 seconds
in the electrocardiogram lab the paper speed is ___ small squares/second
25
in the electrocardiogram lab one small square is ___ seconds
0.04
in the electrocardiogram lab after the S in the QRS complex lab is the _______ line
isoelectric
in the electrocardiogram lab what is occurring during the PR interval
atria will contract
in the electrocardiogram lab what is occurring during the ST interval
ventricles will contract
in the electrocardiogram lab what is the normal duration of the P wave _____ seconds and more than __ small square but less than _____ small squares
0.06- 0.11 seconds, more than 1 square but less than 3
in the electrocardiogram lab what is the normal duration of the QRS complex? less than ____ seconds and less than ___ small square
less than 0.12 seconds & less than 3 small squares
in the electrocardiogram lab how much time elapses between the start of the QRS and the start of the thumb pulse
0.32 seconds
in the electrocardiogram lab what are the 3 specific reasons that there is a delay in time between the start of the QRS complex and the start of the thumb pulse
ventricles take time to depolarize
ventricles take time to contract
travel of pulse wave to the thumb takes place
in the electrocardiogram lab can you wear jewelry
no
in the electrocardiogram lab what electrode placement do we use
lead II
in the electrocardiogram lab can you move or talk
no
in the electrocardiogram lab how do you determine BPM
60 divided by duration
in the electrocardiogram lab how do you calculate pulse transit time
M marker at start of QRS in channel 3, cursor at start of next thumb pulse in channel 2
in the electrocardiogram lab lead I, left arm ____, right arm ___ & left leg ____
black, white, green
in the electrocardiogram lab lead II, left arm ____, right arm ___ & left leg ____
green, white, black
in the electrocardiogram lab lead III, left arm ____, right arm ___ & left leg ____
white, green, black
in the electrocardiogram lab how many electrodes are used
3
in the electrocardiogram lab was a dutch scientist who developed the first external mechanism for recording small electrical waves produced by the heart
willem einthoven
in the blood pressure lab the most common, indirect means of measuring blood pressure is done by using a ______ and a _______
sphygmomanometer, stethoscope
in the blood pressure lab when measuring blood pressure the sound occurs in the ________ as the pressure of the cuff is lowered
brachial artery
in the blood pressure lab the pressure of the cuff _____ the artery
collapses
in the blood pressure lab when the cuff pressure being to fall below the ______ pressure in the artery, blood begins to to the arm. This flow is _______ rather than streamlined
systolic. turbulent
in the blood pressure lab the sound that you hear once you release the cuff
korotkoff sounds
in the blood pressure lab when a sound is first herd it approximates _______ pressure
systolic
in the blood pressure lab when a sound is no longer herd it approximates _______ pressure
diastolic
in the blood pressure lab what causes the first korotkoff sound
blood enters the empty artery and slaps up against the wall
in the blood pressure lab what causes the disappearance of the last korotkoff sound
the artery is filled with blood and the blood no longer slaps against the wall
in the blood pressure lab what heart event is the systolic pressure associated with
ventricular contraction
in the blood pressure lab what heart event is the diastolic pressure associated with
ventricular relaxation
in the blood pressure lab what is the term given to someone 140/90
hypertension
in the blood pressure lab define pulse pressure
systolic - diastolic ( how strong the pulse feels)
in the blood pressure lab you have the cuff layed out flat on the table with the valve _____ but make sure to _____ the valve
open, closed
in the blood pressure lab the tubes which exit the cuff should be positioned over the ______ as well as the ___ of the stethoscope
brachial artery, bell
in the blood pressure lab you pump the bulb until you reach a pressure of _______mmHg do not inflate over ______mmHg
160-180mmhg
in the blood pressure lab how do you calculate heart rate
palpate the carotid artery. count the number of pulses felp in 10 seconds, multiply by 6 the minute heart rate
in the blood pressure lab how do you calculate blood pressure
using a portable sphgmomanometer the theblood pressure in usual manner
in the blood pressure lab how do you calculate respiratory rate
watch the thorax of the subject, counting the number of respiratory cycles in 30 seconds. double to obtain minute rate
in the blood pressure lab, when one goes from rest to exercise the heart rate
increases
in the blood pressure lab, when one goes from rest to exercise the stroke volume
increases
in the blood pressure lab, when one goes from rest to exercise the overall peripheral resistance due to vasoconstriction of both arterioles and veins
increases
in the blood pressure lab, when one goes from rest to exercise the overall venous return
increases
in the blood pressure lab, when one goes from rest to exercise the total cardiac output
increases
in the blood pressure lab, when one goes from rest to exercise the sympathetic nervous stimulation
increases
in the blood pressure lab, when one goes from rest to exercise the parasympathetic nervous stimulation
decreases
in the blood pressure lab, when one goes from rest to exercise the rate of oxygen use by active cells
increases
in the blood pressure lab, when one goes from rest to exercise the rate of carbon dioxide production by active cells
increases
in the blood pressure lab, when one goes from rest to exercise the oxygen level in active muscles
decreases then returns to homeostatic set point
in the blood pressure lab, when one goes from rest to exercise the blood pH
increases then returns to homeostatic set point
in the blood pressure lab, when one goes from rest to exercise the magnitude of respirations
increases
in the blood pressure lab, when one goes from rest to exercise the respiration rate
increases
in the blood pressure lab, when one goes from rest to exercise the blood flow to active skeletal muscles
increases
in the blood pressure lab, when one goes from rest to exercise the blood flow to intestines and kidneys
decreases
in the blood pressure lab, when one goes from rest to exercise the blood flow to cardiac muscle
increases
in the blood pressure lab, when one goes from rest to exercise the blood flow to skin
increases
in the blood pressure lab, when one goes from rest to exercise the blood flow to brain
increases
in the blood pressure lab, when one goes from rest to exercise the pressure gradient of venous return
increases
in the blood pressure lab, when one goes from rest to exercise the venous return of skeletal muscle pump
increases
in the blood pressure lab, when one goes from rest to exercise the venous return of respiratory pump
increases
in the blood pressure lab, when one goes from rest to exercise the venous return of venous vasoconstriction
increases
in the hematocrit lab whole blood is made up of ____ & ____
plasma & formed components
in the hematocrit lab formed components are
RBC, WBC,platlets
in the hematocrit lab a ______ is used to seperate the components. where the ______ components collect at the bottom
centrifuge, heavier
in the hematocrit lab ______ are the heaviest component
RBC
in the hematocrit lab centrifuge blood is used to measure
the percent of RBC in the total blood volume
in the hematocrit lab, this is a good test to see if someone is ______ or making too many
anemic, RBC
in the hematocrit lab the normal hematocrit range for men is
42-54
in the hematocrit lab the normal hematocrit range for women is
38-46
in the hematocrit lab, it is also called a ________test
packed cell
in the hematocrit lab _____ is a liquid connective tissue
blood
in the hematocrit lab the layers go ______, _____ & _____
plasma (nonliving matrix)
buffy coat (WBC & platlets)
RBC
in the hematocrit lab what is is measuring
percentage of cells in blood
in the hematocrit lab what is polycythemia
high RBC count
in the hematocrit lab what materials form the buffy coat
WBC & platelets
in the hematocrit lab when you read a hematocrit chart the clay plug is at ____ and the platelet line is at the _____
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