In cases when the bone marrow is compromised, hematopoiesis can resume in other organs. What is this phenomenon called, and what organs have this ability?

A point-of-service (POS) plan allows members to:

A. choose a health maintenance organization (HMO) or preferred provider organization (PPO) option each time they seek care. B. receive medical care from any in-network or non-network provider. C. do both a and b. D. do neither a nor b.

________ (also called pacemaker cells) are specialized cells that not only create an electrical impulse but also create these impulses at a regular interval

A) Nodal cells B) Bundle fibers C) Vagus cells D) Purkinje fibers