BMS 595 Exam Review 2 questions with
complete solutions graded A+ already
passed
The ECG is a - correct answer ✔✔graphic record of the direction and magnitude of the electrical
activity generated by the depolarization and repolarization of the atria and ventricles of the
heart.
The ECG gives a tracing from - correct answer ✔✔12 different "electrical positions" of the heart
by electrodes attached to the skin.
Normal Heart Rates by Age - correct answer ✔✔
Infant (1 to 12 months) - correct answer ✔✔100-160 bpm
Toddler (1 to 3 years) - correct answer ✔✔90-150 bpm
Preschooler (4 to 5 years) - correct answer ✔✔80-140 bpm
School-age (6 to 12 years) - correct answer ✔✔70-120 bpm
Adolescent (13 to 18 years) - correct answer ✔✔60-100 bpm
Adult - correct answer ✔✔60-100 bpm
, Cardiac myocardial cells (pacemaker cells) - correct answer ✔✔can generate their own action
potential
Cardiac cells have - correct answer ✔✔slow calcium-sodium channels
Conduction Pathway - correct answer ✔✔
The SA node controls - correct answer ✔✔the rate of the entire heart
It has a membrane potential of _____ to ____ mV compared to ____mV to ____ mV of the
ventricular muscle fibers - correct answer ✔✔-55 to -60mV and -85mV to 90mV
Leaky ____ channels that allow sodium to enter even when inactivated - correct answer
✔✔Na+
Lead records:
Each lead records the average electrical flow at a - correct answer ✔✔specific time in a specific
location of the heart.
Lead records:
The ECG records views of the heart on - correct answer ✔✔both frontal and a transverse plane.
Lead records:
The frontal leads include - correct answer ✔✔I, II, III, aVR, aVL, and aVF
Lead records:
Horizontal plane lead include - correct answer ✔✔the six precordial, or chest leads (V1 to V6)
complete solutions graded A+ already
passed
The ECG is a - correct answer ✔✔graphic record of the direction and magnitude of the electrical
activity generated by the depolarization and repolarization of the atria and ventricles of the
heart.
The ECG gives a tracing from - correct answer ✔✔12 different "electrical positions" of the heart
by electrodes attached to the skin.
Normal Heart Rates by Age - correct answer ✔✔
Infant (1 to 12 months) - correct answer ✔✔100-160 bpm
Toddler (1 to 3 years) - correct answer ✔✔90-150 bpm
Preschooler (4 to 5 years) - correct answer ✔✔80-140 bpm
School-age (6 to 12 years) - correct answer ✔✔70-120 bpm
Adolescent (13 to 18 years) - correct answer ✔✔60-100 bpm
Adult - correct answer ✔✔60-100 bpm
, Cardiac myocardial cells (pacemaker cells) - correct answer ✔✔can generate their own action
potential
Cardiac cells have - correct answer ✔✔slow calcium-sodium channels
Conduction Pathway - correct answer ✔✔
The SA node controls - correct answer ✔✔the rate of the entire heart
It has a membrane potential of _____ to ____ mV compared to ____mV to ____ mV of the
ventricular muscle fibers - correct answer ✔✔-55 to -60mV and -85mV to 90mV
Leaky ____ channels that allow sodium to enter even when inactivated - correct answer
✔✔Na+
Lead records:
Each lead records the average electrical flow at a - correct answer ✔✔specific time in a specific
location of the heart.
Lead records:
The ECG records views of the heart on - correct answer ✔✔both frontal and a transverse plane.
Lead records:
The frontal leads include - correct answer ✔✔I, II, III, aVR, aVL, and aVF
Lead records:
Horizontal plane lead include - correct answer ✔✔the six precordial, or chest leads (V1 to V6)
