A reason that the axons in the CNS and PNS differ in their ability to regenerate after injury is that

A. axons of the CNS lack myelin.
B. axons of the CNS lack neurilemmae.
C. peripheral nerves lack endoneurium.
D. peripheral nerves lack Schwann cells.


Answer: B

Anatomy & Physiology

You might also like to view...

Abnormally slow conduction through the ventricles would change the ________ in an ECG tracing.

A) P wave B) RT interval C) T wave D) QRS complex E) PR interval

Anatomy & Physiology

What extracellular ion is necessary for release of neurotransmitter for salty and sour tastes?

A. Na+ B. Ca2+ C. K+ D. Mg2+

Anatomy & Physiology

How often is the protective lining of the stomach replaced?

a. every 12 days b. every 7 days c. every 3 days d. every day e. every 12 hours

Anatomy & Physiology

Cardiac muscle cells are like skeletal muscle cells in that they both

A. have striations. B. depolarize as a result of sodium and calcium influxes. C. possess intercalated disks. D. lack sarcomeres. E. are multinucleated.

Anatomy & Physiology