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What is reflexes 2 plus?
It appears that there is a typo in the question—there is no clear meaning for "reflexes 2 plus." Reflexes are automatic responses to stimuli, and the number "2 plus" typically refers to addition. If you have a specific question or context, please provide more information.
What is the name given to the valleys on the surface of the cerebral cortex?
The name given to the valleys on the surface of the cerebral cortex is "sulci," while the raised ridges are called "gyri." These folds increase the surface area of the brain, allowing for more neurons and synapses to fit within the skull.
What is a message sent from a sensory neuron to an interneuron and then goes on to the motor neuron?
The message is transferred with an electron signal, pulses (arcing between the two neurons). This is similar to an electrical circuit (in which electrons also flow to different circuit components), or to a fiber optic line (where pulses of light serve as substitutes to the electrons).
How does sleep affect your reflexes?
Although sleep is not fully understood by scientists, their is evidence of sleep deprivation affecting reflex reaction time. Sleep deprivation affects the cortical responsiveness to incoming stimuli and also causes an increase in the levels of adenosine which is a neuromodulator and has a general inhibitory effect on neural activity. Thus due to the increase in adenosine, the neural activity and response time is greatly affected due to lack of sleep.
Do The creases and folds allow more neurons to occupy a limited amount of space?
Yes, the creases and folds in the brain (sulci and gyri) increase the brain's surface area, allowing more neurons to occupy a limited space. This increased surface area enables a greater number of neurons to be packed into the brain, supporting higher cognitive functions.
What determine the speed of a reflex?
The speed of a reflex is primarily determined by the type of neurons involved, the distance the signal must travel, and the complexity of the reflex arc. Reflexes that involve fewer synapses, such as monosynaptic reflexes, are faster than those with multiple synapses, like polysynaptic reflexes. Additionally, myelination of the neurons enhances conduction speed, allowing for quicker responses. Overall, simpler and more direct pathways yield faster reflex responses.
Why do more complex reflexs have slower response times?
Reflexes are automatic, involuntary responses or impulses. Most reflexes do not involve the brain, however, more complex reflexes have to involve the brain in order to process the reflexes. An example of this would be blinking the eye. This is a complex reflex and it must involve the brain. Also, you must take in the place the reason why reflexes do not involve the brain: because it could cause serious damage to the body. Complex reflexes will not cause serious damage if it uses to brain to produce the impulse.
Do reflexes happen more quickly or slowly than considered responses?
Reflexes happen more quickly than considered responses. Reflexes are automatic responses to stimuli that occur rapidly without conscious thought, while considered responses involve higher cognitive processes and may take longer to generate.
What the difference between superficial and deep reflexe?
Superficial reflexes are responses elicited by stimulation of the skin or mucous membranes, such as the withdrawal reflex or the abdominal reflex, and are typically mediated by the spinal cord and the brainstem. In contrast, deep reflexes, also known as deep tendon reflexes, involve muscle stretch and are usually assessed through tendon taps, like the knee-jerk reflex, and are primarily mediated at the spinal cord level. Superficial reflexes often involve more complex neural pathways and higher brain functions, whereas deep reflexes are more direct and can occur without brain involvement.
What is the Difference between simple reflex and complex reflex?
A simple reflex involves a direct pathway that includes only a sensory neuron and a motor neuron, resulting in an immediate, involuntary response to a stimulus, such as the knee-jerk reflex. In contrast, a complex reflex involves multiple neurons and often includes interneurons, allowing for more intricate processing and integration of information, which can lead to a more coordinated response, such as withdrawal from pain. Simple reflexes are typically faster and more straightforward, while complex reflexes can involve higher brain functions and emotional responses.
Spinal reflexes are produced in what?
Introduction. Spinal cord reflexes are simple behaviors produced by central nervous system (CNS) pathways that lie entirely within the spinal cord. The sensory afferent fibers that evoke these reflexes enter the spinal cord and activate spinal motor neurons directly or through a chain of one or more spinal interneurons
What is Long and short loop autonomic reflex?
Long loop and short loop autonomic reflexes refer to different pathways through which the autonomic nervous system regulates bodily functions. Long loop reflexes involve multiple synapses and often include the brain, allowing for more complex processing and integration of sensory information. In contrast, short loop reflexes involve fewer synapses and typically occur at the level of the spinal cord or brainstem, enabling quicker, more immediate responses to stimuli. These reflexes play crucial roles in maintaining homeostasis and responding to environmental changes.
How do basic and learned or acquired reflexes differ?
learned or acquired reflex - a reflex which is learned through practice or repetition and may involve both a far more complicated set of triggering stimuli and a far more complicated pattern of motor response, e.g., the reflexive motor actions produced after one has learned to ride a bicycle or drive a car; most such reflexes are somatic because they involve complex response patterns from skeletal muscles. While an unlearned reflex is like breathing
Why Human and worm neurons different?
Human neurons and worm neurons differ primarily in complexity and function. Human neurons are part of a highly intricate nervous system capable of advanced cognitive functions, while worm neurons, such as those in the model organism Caenorhabditis elegans, form a simpler nervous system designed for basic reflexes and behaviors. Additionally, human neurons have a greater variety of types and connections, enabling more sophisticated processing and communication. These differences reflect the evolutionary adaptations of each organism to their respective environments and lifestyles.
Are reflexes unconditional?
Reflexes can be either unconditional or conditional. Conditional, also referred to as 'Pavlovian', reflexes are those that we can develop. They are weak in humans, but can be observed more readily in other organisms. For more information on these, research Pavlov's dog. Unconditional reflexes are those which are innate - we're born with them. Neurologically speaking these typically do not have any nerves passing through the brain, unlike conditional reflexes in which neurons pass through higher cortical areas of the brain. An example of an unconditional reflex in humans is beginning to salivate when we smell something yummy. This is down to our olfactory tracts, which contain receptors which will stimulate a reflex resulting in secretion from the salivary glands.
What is the difference between monosynaptic and polysynaptic?
Monosynaptic refers to a neural pathway involving just one synapse, while polysynaptic involves multiple synapses. Monosynaptic pathways are direct and involve only two neurons, while polysynaptic pathways are more complex and involve multiple relay neurons.
What part of the spinal cord acts as the center for simple reflex activity?
The gray matter is the center for simple reflex activity.Reflexes are rapid, automatic responses to stimuli that "buy time" for the planning and execution of more complex responses that are often consciously directed.The fastest reflexes are somatic motor reflexes that (1) involve myelinated axons, (2) involve only one segment of the spinal cord or one nucleus of the brain, and (3) are monosynaptic.
