Doctors do not administer vaccinations to people who are too sick. which best explains why? a. the weakened or dead form of the pathogen may not have any effect on sick people. b. the weakened or dead form of the pathogen may have a fatal effect when it is combined with medication that the sick people are taking. c. the digestive systems of sick people may be negatively affected by the weakened or dead pathogen. d. the white blood cells of sick people may not be able to efficiently handle the weakened or dead form of the pathogen.

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Describe five factors that influence the value of fuel

Does mitochondria still meet the definition of a eukaryote why or why not?