When the paramedic shouts "stand back" and applies the paddles to administer a strong current, this is an attempt to

A) restart ventricular contractions that have completely stopped.
B) reverse control of heartbeat from AV to SA nodes.
C) align the P-QRS waves with the electrical paddle waves.
D) stop the ventricles from uncontrolled contractions so the SA node can reestablish a coordinated beat.
E) destroy heart tissue that is out of control.

The cerebrum is more developed in monkeys, apes, and humans compared to other primates.

Amoebozoans are heterotrophic protists with cells that lack ____; therefore, they can constantly change shape.

A) cell junctions
B) a cytoskeleton
C) a cell membrane
D) a cell wall or pellicle
E) pseudopods

Within chromosomes, DNA is wrapped around proteins called ____.

A) karyotypes
B) chromatids
C) nucleosomes
D) centromeres
E) histones

Digestion of food is regulated by the

A) sensory division.
B) sympathetic division of the ANS.
C) parasympathetic division of the ANS.
D) somatic nervous system.
E) None of the choices are correct.

The time interval following ejaculation during which stimulation does not cause erection is called

A) the luteal phase.
B) the proliferative phase.
C) the secretory phase.
D) spermatogenesis.
E) the refractory period.