The most important and complex part of the reflex arc
The reflex arc consisted of five parts: the receptor, the sensory nerve, the reflex center, the efferent nerve, and the receptor. Among them, the reflex center had the most complex function, which played a key role in the analysis and integration of reflex activities. The receptor was mainly responsible for receiving stimulation and producing nerve impulses. The efferent nerves were responsible for transmitting the impulses to the reflex center. After the reflex center performed a complex analysis and processing of the incoming signals, it then transmitted the instructions to the efferent nerves to change its function. Therefore, among the various components of the reflex arc, the function of the reflex center was the most complicated. Read more exciting novels for free
Where is the nerve center of complex reflex?
The nerve center for complex reflexes was located in the cerebral hemisphere. Complex reflexes were produced after birth. They were the basic way of high-level neural activity, and their formation required the participation of the cerebral hemisphere. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Is the urine reflex a reflex arc?
The urinating reflex was a reflex activity that was composed of a receptor, an impudent nerve, a nerve center, an efferent nerve, and an receptor. It was a reflex arc. When the volume of urine stored in the bladder reached a certain level (about 400 ml), and the pressure in the bladder rose to more than 15 cm of water column (1.36 cm of water column = 1 mm of mercury), the bladder would expand passively, stimulating the stretch receptor in the bladder wall and exciting it. The impulse was transmitted to the primary center of the sacrum spinal cord through the sensory fibers of the Pelvic nerve. At the same time, the spinal cord would transmit the information of bladder distension to the higher center of the bladder reflex in the cerebral cerebral hemisphere and produce the desire to urinate. The high centers of the reflex reflex, such as the cerebral cortices, exert a supportive or suppressive effect on the low centers of the reflex to control the reflex activity. Then, the impulse goes along the efferent nerves to the efferent organ to cause the reflex. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
If the reflex arc is complete, will there be a reflex? Why?
Complete reflex arc was a necessary condition for a reflex to occur, but it was not a sufficient condition. The reflex arc was composed of five parts: the receptor, the sensory nerve, the reflex center, the sensory nerve, and the receptor. The integrity of the structure and function of the reflex arc was the basis for the completion of the reflex. If any of the links were damaged or blocked, the reflex activity would not be completed. However, even if the reflex arc is complete, if there is a lack of sufficient stimulation, or if the reflex center is inhibited (such as the effect of certain drugs or nervous system diseases), the reflex may not occur. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
When a dog sees a bone, drooling is a complex reflex
When a dog saw a bone, drooling was an unconditioned reflex, not a complex reflex (conditioned reflex). Unconditioned reflexes were a dog's innate instinctive behavior, and it was the basic reflex of all its survival activities. When a dog saw a bone, this visual stimulation would act on its visual organs, triggering the innate reflex activity of drooling. This activity was achieved by the lower parts of the nervous system, and it was constant and consolidated. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Limit Challenge Reflex Arc
In the Limit Challenge, many members were mentioned about the Reflex Arc. Sun Honglei's reflex arc was longer, and netizens ridiculed that his reflex arc was longer than Zhang Yixing's. He even thought that the "men's gang" had returned four years ago during archaeology; Lei Jiayin also had a longer reflex arc, and because of her honest smile and long reflex arc, people liked her; Huang Lei had also been questioned that his reflex arc was too long, and it took more than 24 hours for him to react. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Stimulate the throat muscle reflex to form a new reflex arc
The reflex arc consisted of five parts: the receptor, the sensory nerve, the reflex center, the efferent nerve, and the receptor. For the reflex of the throat muscle, when the throat is stimulated, the sensory organs in the throat first receive the stimulation and generate electrical signals (nerve impulses), which are transmitted to the reflex center through the sensory nerves. After the reflex center analyzed the incoming signal, it sent out an efferent command to the efferent nerve to reach the receptor (the muscles of the throat and other structures), thus causing the response of the throat muscles, which constituted a basic reflex arc. If a new reflex arc was to be formed, it often required certain conditions to be applied on the basis of the existing reflex arc. For example, if some kind of stimulation (For example, a specific chemical stimulation, a special mechanical stimulation, etc.) repeatedly with other irrelevant stimulation (such as a certain sound or light) at the same time on the reflex of the throat muscle. After many combinations, it was possible to form a new connection in the cerebral hemisphere or other relevant nerve centers. Therefore, on the basis of the original reflex arc, the original irrelevant stimulation was integrated into the reflex arc. When the irrelevant stimulation appeared alone, it could also trigger a similar reflex of the throat muscle, which formed a new reflex arc. However, the formation and change of reflex arcs were also affected by many factors, such as the development of the nervous system and the overall physiological state of the body. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What part of the earlobe is the reflex zone?
The earlobe was mainly the reflection area of the face. There were 91 reflection areas on the earlobe. For example, the reflection areas of the head and facial organs such as the eyes were on the earlobe. When there were problems related to the face, such as swollen gums (gums belong to the face), eye discomfort, and so on, they could stimulate the reflex zone of the earlobe for health care. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What determines the length of the reflex arc?
The length of the reflex arc was determined by many factors. From a physiological point of view, the development of the brain, the health of the nervous system, adequate nutrition, and adequate sleep would all affect it. For example, when the brain is not fully developed, has a nervous system disease, is malnourished, or lacks sleep, it may cause the brain's reaction speed to slow down, resulting in a longer reflex arc. Age was also a factor. As one aged, the nerve cell transmission speed slowed down, which could cause the reflex arc to be extended. In addition, some diseases such as cerebral stroke, cerebral hemorrhage, and some drugs may also affect the human nerves, causing the nerve cell transmission function to decrease, resulting in a longer reflex arc. From the perspective of psychological factors, lack of confidence, anxiety, nervousness, and other emotions would interfere with the agility of thinking and action, which would affect the length of the reflex arc. Similarly, environmental factors could not be ignored. Being in a monotonous and unstimulating environment for a long time, or suddenly facing a complex and unfamiliar environment, could cause one's reaction speed to slow down and the reflex arc to lengthen. In addition, there were some special situations. For example, when one was highly focused on something, one's reflex arc might be longer. From the perspective of gender differences, some studies had pointed out that men were generally more "slow" in emotional reactions than women, and they might have longer reflex arcs related to certain emotions. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What are the structures of the hand retracting reflex arc?
The reflex arc of the hand retracting reflex was composed of a receptor, an impudent nerve, a nerve center, an efferent nerve, and an receptor. The receptor was usually the nerve endings in the skin of the arm. After sensing the stimulation, it would pass the stimulation to the nerve center through the spinal nerve or the cerebral nerve as an incoming nerve. The nerve center of the hand-retracting reflex was in the spinal cord (which was a lower nerve center and the higher brain). Then, through another spinal nerve or cerebral nerve, the spinal cord would send the hand-retracting command to the arm muscles. The arm muscles would contract and retract the hand. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reflex and Pupil Reflex
The adjustment reflex and the pupil's light reflex were two important physiological reflexes. The reflex of accommodation was a series of changes in the eyes in order to see nearby objects, such as the bulging of the lens, the narrowing of the pupils, and the convergence of the eyes. The pupil's light reflex was even more interesting. When light shone on one side of the eye, the illuminated pupil would shrink. This was the pupil's light reflex. It could protect the eyes from strong light and regulate the amount of light entering the eyes. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>