biology test 5, page 5 study material

atrioventricular node

in the electrocardiogram shown below, the left hump (A) indicates the contradiction of the atria, and the tall peak (V) indicates the contraction of the ventricles. What structure within the cardiac conduction system causes the gap between them (G)?

hypertension

a person's resting blood pressure is 155/95. What medical condition does he have?

cardiac muscles cells have a higher density of mitochondria than skeletal muscle cells

which of the following differences between cardiac and skeletal muscles cells BEST explains why cardiac muscle cells are more dependent on a steady supply of nutrients than are skeletal muscle cells

exhalation does mot require muscle contraction

which of the following statements BEST explains why normal exhalation at rest can be considered a passive process

People with type AB blood have neither anti-A nor anti-B antibodies

which of the following statements best explains why people with type AB blood are sometimes considered universal recipients