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Nervous System
This category is for questions about the mechanical and chemical process of reactions to internal and external stimuli, ranging from the brain down to the spinal cord, and all nerves, cells and tissues in between.
3,047 Questions
Do sodium potassium ATPase pump causes positive charge to accumulate inside cells?
Yes, the sodium-potassium ATPase pump helps maintain the resting membrane potential of cells by transporting three sodium ions out of the cell and two potassium ions into the cell for every ATP hydrolyzed. This generates a net positive charge outside the cell and a negative charge inside the cell, contributing to the overall negative resting membrane potential of the cell.
What two systems make up the nervous system?
Actually there are 3 structures
1.The spinal cord or spine
2.The brain
3.The veins {not really the main ones}.
Therefore the answer is the spinal cord and the brain.
What are the characteristics of the parasympathetic nervous system?
The parasympathetic nervous system (PNS) is the exact opposite of the sympathetic nervous system (SNS). It will usually stop, decrease, or slow down any kinds of action.
For example, the SNS will increase the heart rate when you exercise, while the PNS will decrease the heart rate when you stop exercising.
In the reflex arc a muscle or gland is considered to be the?
In the reflex arc, a muscle or gland is considered to be the effector. Its role is to respond to the stimulus provided by the sensory neuron and produce the appropriate action, such as muscle contraction or gland secretion.
Find a description and major functions of the central nervous system and peripheral nervous system?
1 system involves the spine and the brain. this is called the central nervous system.the second system only incolves the spinal chord. peripheral nervous system
somatic nervious system and the autonomic nervous system
What happens to a muscle when an electrical impulse from a nerve stops?
When the electrical impulse from a nerve stops, the muscle relaxes and returns to its resting state. This is because the nerve impulse initiates the release of calcium ions in the muscle cells, leading to muscle contraction. When the nerve impulse stops, the calcium ions are reabsorbed, causing the muscle to relax.
One who treats afflictions of the nervous system is?
A neurologist is a medical specialist who diagnoses and treats disorders related to the nervous system, which includes the brain, spinal cord, and nerves. They help patients with a range of conditions such as epilepsy, stroke, and multiple sclerosis.
- The nervous system is composed of the peripheral nervous system (PNS) and the central nervous system (CNS)
- Every neuron has a cell body and nerve fibers.
- Neurons can be classified three different ways regarding their structure.- 1. Bipolar- has two nerve fibers, one arising from each end. 2. Unipolar- has a single nerve fiber that extends from the cell body and then divided into two branches. 3. Multipolar- have many nerve fibers arising from the cell body
- There are two types of nerve fibers. Dendrites transmit impulses to the cell body and the axon transmits impulses away from the cell body.
- Many axons are covered with myelin. Myelin is largely composed of a lipid protein. It forms around the axon and protects it.
- Their are cells in the nervous system called Neuroglial cells. These cells fill spaces, support neurons, provide framework for structure, produce myelin, and carry out phagocytosis.
- Sensory nerves- nerves that conduct impulses into the brain or spinal cord.
- Motor nerves- nerves that carry impulses to muscles or glands.
- Mixed nerves- consists of most nerves. These include both sensory and motor nerve fibers.
- Meninges protect the CNS (brain and spinal cord). Meninges have three layers, the dura mater, arachnoid mater, and the pia mater.
- The peripheral nervous system (PNS) can be divided into the somatic nervous system and the autonomic nervous system.
What are two parts of the peripheral nervous system?
The two parts of the peripheral nervous system are the somatic nervous system, responsible for voluntary movements and sensory input, and the autonomic nervous system, which regulates involuntary functions like heart rate and digestion.
How do you ask someone out without getting nervous?
Prepare what you want to say and practice beforehand to build confidence. Remember that it's normal to feel nervous, but try to focus on the present moment and be yourself. Keep it simple and direct when asking, and remember that the worst thing they can say is no.
What is parasympathetic stimulation?
Parasympathetic stimulation refers to the activation of the parasympathetic nervous system, which is one part of the autonomic nervous system responsible for rest and digest functions. It slows the heart rate, increases digestion, and promotes relaxation in the body.
Do boys get nervous when they ask you out?
Boys get very nervous when they ask girls out, especially when they first try. You girls should cut them a little slack, and you know, it's not a problem if you want to do the asking now and then. Years ago, that was never done!
Functions of the corpus callosum?
The corpus callosum is a bundle of nerve fibers that connects the left and right hemispheres of the brain, allowing them to communicate with each other. It plays a crucial role in coordinating motor functions, sensory processing, and higher cognitive functions between the two hemispheres. Damage to the corpus callosum can result in impaired communication between the brain hemispheres, leading to issues with coordination, perception, and cognition.
What is the term for nerves carrying both sensory and motor fibers?
Mixed nerves are nerves that carry both sensory and motor fibers. These nerves enable bidirectional communication between the brain and various parts of the body, allowing for both sensory input and motor output to be transmitted.
What role does the nervous system play in the digestive system?
The digestive system is related to the nervous system in such a way that the nervous system dictates the speed of breaking down of food. The nervous system overseas activity in the digestive tract, and regulates secretion if there are changes.
What are the differences between the central nervous system and the autonomic nervous system?
The central nervous system is the part of the nervous system that integrates the information that it receives from, and coordinates the activity of, all parts of the bodies of bilaterian animals and the endocrine system is a system of glands, each of which secretes a type of hormone directly into the bloodstream to regulate the body.
What are the four parts of the nervous system?
You could define the 5 major parts of the nervous system by saying they are:
the central nervous system, and the somatic, sympathetic, parasympathetic and entericnervous systems.
However, a better way of describing the parts of the nervous system is to
divide it into two main parts and then sub-parts:
the main parts:
the Central Nervous System (CNS, brain & spine),
and the Peripheral Nervous System (PNS, all the nerves and neurons outside the brain and spine).
Then the peripheral nervous system is divided into
the somatic nervous system (nerves which control the voluntary muscles) and
the autonomic nervous system (nerves which control visceral functions or organs like the heart or stomach);
and the autonomic nervous system is itself divided into the
sympathetic (fight-or-flight emergency response),
parasympathetic (relaxation),
and enteric (digestive) nervous systems.
ATP is adenosine triphosphate; it consists of carbon, hydrogen, oxygen, phosphorus, and nitrogen. It's formula is: C10H16N5O13P3
There are 3 phosphate groups in it (one phosphorus atom with 4 oxygens), connected to an adenosine group, C10H13N5O4, (itself made up of an adenine nucleobase(C5H5N5) made up of 5 nitrogens, 5 hydrogens, and 5 carbons, connected to a ribose sugar molecule, C5H10O5)
What are the Stages of nerve impulses?
The action potential has 5 main phases:
1) stimulation/rising phase - depolarization caused by influx of sodium ions at the axon hillock; potential increases from a resting potential of -70 mV2) peak phase - depolarization and membrane potential reaches a peak, with sodium channels open maximally, at about +40 mV
3) falling phase - potassium channels open in response, causing a subsequent reduction in membrane potential, and the neuron begins to repolarize
4) hyperpolarization/undershoot phase - more potassium channels stay open after sodium channels close, causing a hyperpolarization of the neuronal membrane, bringing the potential down below its initial resting potential (below -70 mV)
5) refractory phase - potassium channels begin to close, allowing the membrane potential to revert back to the resting potential of -70 mV; during this phase, the probability of the nerve being able to refire is extremely low, thus allowing for a delay between action potentials
What is a term used for a nervous fit?
A term that can be used for a nervous fit is an "anxiety attack" or "panic attack." These are characterized by feelings of intense fear or panic, physical symptoms such as rapid heartbeat and sweating, as well as a sense of losing control. It is important to seek support and treatment if experiencing frequent anxiety or panic attacks.
What are the general functions of the nervous system?
- Sensory functions have receptors that detect internal and external changes
- Integrative functions collect sensory information and make decisions that motor functions carry out
- Motor functions stimulate effectors in order to respond
to send signals from one cell to another; the nervous system control and coordinates the entire body
There is that guy who likes me but I always feels nervous whenever I see him?
Girl trust me I know how you feel. When ever you see this guy just go over to him and just hi or how's it going and walk it away after he answers. Don't feel nervous especially if this guy like you. Who know you guys might be love. So just be calm and say hi to guy one and a while.
Parts of peripheral nervous system?
The peripheral nervous system consists of two main parts: the somatic nervous system, which controls voluntary muscle movements and receives sensory information, and the autonomic nervous system, which regulates involuntary processes like heart rate, digestion, and breathing.
Dendrites conduct both graded and action potential?
Dendrites primarily conduct graded potentials, which are local changes in membrane potential. These graded potentials can accumulate and trigger an action potential in the axon hillock if they reach a certain threshold. Action potentials are then conducted along the axon.
