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Which division of the autonomic nervous system is involved in secreting norepinephrine via adrenergic nerve fibers?
Sympathetic nervous system .
What fibers are the sweat glands innervated by?
Sweat glands are innervated by adrenergic sympathetic nerve fibers from the autonomic nervous system. These fibers release norepinephrine, which stimulates the sweat glands to produce sweat.
What substance slows the message passing from the brain to the rest of the body?
Unmyelinated nerve fibers are slower than myelinated nerve fibers. The fibers covered by myelin are much faster.
Which nerve fiber do impulses travel slowly?
Unmyelinated nerve fibers conduct impulses more slowly than myelinated nerve fibers. Myelinated nerve fibers have a fatty substance called myelin sheath that allows for faster transmission of impulses compared to unmyelinated fibers without this sheath.
Is acetylcholine the substance released by axonal endings of the somatic efferent fibers and by the parasympathetic nerve fiber endings?
Yes, it does. In contrast, the sympathetic nerves release adrenaline
What is the white substance of the brain?
The white substance of the brain is composed primarily of myelinated nerve fibers, which help transmit signals efficiently between different parts of the brain. Myelin is a fatty substance that acts as an insulating sheath around nerve fibers, enhancing the speed and efficiency of electrical signal transmission.
What is the meaning of myelin?
A soft white substance constituting the medullary sheats of nerve fibers, and composed mainly of cholesterin, lecithin, cerebrin, albumin, and some fat., One of a group of phosphorized principles occurring in nerve tissue, both in the brain and nerve fibers.
What is the substance released at axon terminals?
The substance that is released at an axonal ending to propagate the nerve impulse to the next nerve or muscle is called
What ia a substance?
What is chromatophilic substance? The chromatophilic substance, of Nissl bodies, are the orderly arrangement of rough endoplasmic reticulum. The proteins from these Nissl bodies are used to restore peripheral nerve fibers.
Are efferent nerve fibers also described as motor nerve fibers?
yes
What is a anti-adrenergic drug?
Antiadrenergic drugs decrease or block effects of sympathetic nerve stimulation, endogenous catecholamines (e.g. epinephrine), and adrenergic drugs.
What ia a chromatophilic substance?
What is chromatophilic substance? The chromatophilic substance, of Nissl bodies, are the orderly arrangement of rough endoplasmic reticulum. The proteins from these Nissl bodies are used to restore peripheral nerve fibers.
