A. Have increased excitability
B. Have to nodes of Ranvier
C. Have no power of regeneration
D. Have no association of Schwann cells
Related Mcqs:
- Unmyelinated nerve fibres of pulp are____________?
A. Sensory in nature
B. Respond to hot and cold
C. carry pain sensation
D. Associated with blood vessels and are sympathetic in nature - Bone marrow stem cells differ from differ from differentiated progenitor stem cells in what respect ?
A. Provide differentiated terminal cells
B. Reconstitution of Bone marrow
C. Formation of the ovum
D. Act as a repair system for the body - Which of the following is not true for myelinated nerve fibers______________?
A. Impulse through myelinated fibers is slower than non- myelinated fibers
B. Membrane currents are generated at nodes of Ranvier
C. Saltatory conduction of impulses is seen
D. Local anesthesia is effective only when the nerve is not covered by myelin sheath - Sensory nerve fibers to posterior one third of the tongue is supplied by ______________?
A. XII cranial nerve
B. IX cranial nerve
C. X cranial nerve
D. VII cranial nerve - Preganglionic parasympathetic fibers are_______________?
A. Somatic only
B. Parasympathetic
C. Sympathetic
D. Cholinergic - Group B fibers are present in_____________?
A. Intrafusal fibers of the muscle spindle
B. Golgi tendon apparatus
C. Autoonomic preganglionic fibers
D. Spinothalamic tracts - The most outer covering of nerve fibres is called as____________?
A. Neurolemma
B. Perineurium
C. Axolemma
D. Myelin sheath - The velocity of conduction in the Purkinjie fibers of the heart is__________________?
A. 1 to 4 m/sec
B. 5 to 8 m/sec
C. 9 to 12 m/sec
D. More than 12 m/sec - The number of muscle fibers in a motor unit are least in______________?
A. Laryngeal muscles
B. Pharyngeal muscles
C. Muscles of middle ear
D. Extraocular muscles - Two major types of muscle fibres are found in humans_____________?
A. white and brown
B. White and yellow
C. White and gray
D. White and red
