Imran Arif BIO 203.03
Pre-lab 7

Vocabulary

Systole- The time at which ventricular contraction occurs.

Atrium- The upper chambers of the heart.

Ventricles- The lower chambers of the heart which pump blood to the body.

Pacemaker- An object or substance that influences the rate at which a certain phenomenon occurs, often used alone to indicate the natural cardiac pacemaker.

Sinoatrial Node- The impulse generating (pacemaker) tissue located in the right atrium.

Sinus Venosus- An enlarged region between the vena cava and the right atrium, which houses the pacemaker in the amphibian heart.

Electrocardiogram- An recording of the electrical activity of the heart on a moving strip of paper. The electrocardiogram detects and records the electrical potential of the heart during contraction.

Dipole- A molecule that has both negative and positive charges.

P wave- The start of the measure in electrical activity on the ECG of the heart.

QRS......

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Title: Biochemistry
Approximate Word Count: 555
Approximate Pages: 3 (250 words per double-spaced page)

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