Describe the electrical activity of the heart to include the
electrical activity of the noncontractile auto...
Describe the electrical activity of the heart to include the
electrical activity of the noncontractile auto rhythmic cells
(pacemaker cells) and the depolarization and repolarization of the
myocardium.
Which of the following is true regarding the conduction of
electrical activity in the heart?
Select one:
a. Conduction through the AV node is relatively slow
b. The wave of depolarization travels directly from the atrial
muscle to the ventricular muscle
c. The AV node determines heart rate in a healthy person
d. 2 of the above are correct
e. None of the above are correct
describe the role role of the heart sending blood to the brain.
Please include the separate chambers, valve and autorhythmic fibers
in your description.
Describe the step by step process pertaining to how blood moves
through the heart. Include the various structures in the heart that
are important for this. Explain the relationship between blood
plasma, interstitial fluid and lymph fluid
Describe the role of the autonomic nervous system in
controlling heart rate (include neurotransmitters, whether it
increases and/or decreases heart rate and what specific part of the
brain exerts the most control over heart rate). Include
neurotransmitters and receptors.
Describe how the blood flows through the heart (similar
to a circuit), include each step using the medical terms . Describe
how and why blood needs to be sent to the lungs and why it is then
sent back to the heart.
Question 1: The pulse wave is created by:
A. the electrical singals of the heart
B. The contraction of the arteries
C. The contraction of the left ventricle
D. The contraction of the bronchioles
Question 2: If the arteries are vasodilated, then the pulse
amplitude will be:
a. faster
b. slower
c. higher
d. lower
question 3. venous return of the heart occurs due to pressure
created by:
a.respiratory pump only
b. skeletal muscle pump only
c. contraction of the...
A defibrillator delivers a jolt of electrical energy to restart
a heart that is either stopped or undergoing ventricular
defibrillation -- a rapid irregular beating. This energy is
supplied by a charged capacitor and applied via paddles placed on a
patient's body(one on each side of the heart). Consider a 20.7 μF
capacitor charged to 2210 V in a defibrillator and used on a
patient. After 9.85×10-2 seconds the voltage across the
defibrillator's paddles drops to 49.6 V.
Find the...
Describe the 2 phases of ventilation: inspiration and
expiration. make sure to include activity of muscles involved, the
pressure and volume of the lungs during each phase, and sources of
neural control for these processes.