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Chromosomes attach to spindle fibers during the metaphase stage of cell division. In this phase, the chromosomes align along the metaphase plate in the center of the cell, and the spindle fibers, which originate from the centrosomes, attach to the kinetochores on the centromeres of the chromosomes. This alignment is crucial for the proper separation of sister chromatids during the subsequent anaphase.
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What type of fibers make up the posterior and anterior roots of the spinal nerve?
Both Afferent and Efferentboth sensory and motorContains motor & sensory fibers!The spinal cord consists of nerve fibers that are afferent and efferent.
The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic and lumbar region of the spinal cord and carries visceral motor fibers that are myelinated form the?
The preganglionic fibers that connect a spinal nerve with an autonomic ganglion in the thoracic and lumbar regions of the spinal cord are part of the sympathetic nervous system. These fibers originate from the lateral horns of the spinal cord and are myelinated, allowing for rapid signal transmission. They typically travel through the ventral roots and enter the sympathetic chain or prevertebral ganglia to synapse with postganglionic neurons.
What branch of the spinal nerve contain autonomic fibers?
The autonomic fibers are contained within the ventral (anterior) root of the spinal nerve. These fibers are responsible for carrying signals to and from the autonomic nervous system, which controls involuntary bodily functions.
The brachial plexus can contain fibers from?
The brachial plexus contains fibers from the ventral rami of the cervical spinal nerves (C5-C8) and the first thoracic spinal nerve (T1). These fibers combine to form the nerves that innervate the upper limb.
What part of a spinal nerve contains only efferent fibers?
The ventral root of the spinal nerve has the efferent fibers and the dorsal root has the afferent. Prior to joining each other in the spine they each consist of only those fibers.
Nerve fibers in what division of the autonomic nervous system arise from the brainstem and the sacral region of the spinal cord?
Brain
What is another name for parasympathetic?
The parasympathetic division is also called the craniosacral division because it arises from te brain and sacral region of the spinal cord; its fibers travel in certain cranial and sacral nerves. The parasympathetic division is also called the craniosacral division because it arises from te brain and sacral region of the spinal cord; its fibers travel in certain cranial and sacral nerves.
What type of fibers make up the posterior and anterior roots of the spinal nerve?
Both Afferent and Efferentboth sensory and motorContains motor & sensory fibers!The spinal cord consists of nerve fibers that are afferent and efferent.
Does the spinal cord have a backbone?
The spinal cord is a bundle of nerve fibers which is inside of the vertebrae (backbones).
What part of the spinal nerve consists of motor fibers leaving the spinal cord?
The ventral root.
The gray matter of the spinal cord?
Is located within the spinal cord and contains unmyelinated fibers.
What fibers do ventral spinal cord roots contain?
The ventral roots contain motor fibers.
Afferent nerve fibers enter the part of the spinal cord called?
Afferent nerve fibers enter the spinal cord through the dorsal roots.
What does a pelvic splanchnic nerve contains?
Preganglionic parasympathetic fibers. In the Parasympathetic division, the preganglionic axons leave the ventral roots of the spinal cord and collectively form the pelvic splanchnic nerves.
Does the proximal end of the spinal cord attach to the cerebellum?
no
Are spinal nerves efferent afferent or mixed?
Spinal nerves are mixed nerves, meaning they contain both afferent (sensory) and efferent (motor) fibers. Afferent fibers carry sensory information from the body to the spinal cord, while efferent fibers transmit motor commands from the spinal cord to the muscles. This dual function allows spinal nerves to facilitate communication between the central nervous system and the rest of the body.
The anterior root of the spinal cord is composed of?
motor fibers
