Which of these developments is a positive effect of cell technology on society?
A)New vaccines can be made quickly enough to stop epidemics.
B)The ability to clone animals allows people to replace beloved pets.
C)More money is spent to design drugs that treat common diseases.
D)Cord blood banks are used to store blood to benefit individuals.

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

What is the next step in muscle contraction after the actin changes shape? (apex)

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.