A reason that the axons in the CNS and PNS differ in their ability to regenerate after
injury is that
A) peripheral nerves lack Schwann cells.
B) axons of the CNS lack neurilemmae.
C) peripheral nerves lack endoneurium.
D) axons of the CNS lack myelin.
B
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Atresia occurs prior to menarche and during the luteal phase of each ovarian cycle.
Answer the following statement true (T) or false (F)
Neil accidentally ingests a substance that activates the complement cascade in the absence of bound antibodies. This substance would _________.
A) increase circulation of lymph. B) cause extensive cellular damage. C) produce a fever. D) activate blood clotting. E) prevent inflammation.
What is the major difference between lymph and tissue fluid (interstitial fluid)?
A. Tissue fluid contains more white blood cells than lymph. B. Lymph is found only in lymphatic organs like lymph nodes; tissue fluid is found in the lymphatic vessels. C. Lymph contains plasma proteins; tissue fluid does not. D. Their location: lymph is in lymphatic vessels, tissue fluid is in the tissues, between tissue cells.
What are pluripotent stem cells?
A. Cells found only in adult tissue that replace cells that have died or become damaged. B. Cells from pre-embryos that can develop into any type of embryonic or adult cell. C. Very strong cells that can assume the function of any cell type in the body. D. Cells found only in the bone marrow that can differentiate into any kind of blood cell. E. Cells that are able to develop only into one mature cell type.