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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
Sympathetic Nervous System
How many pairs are of the cranial nerves?
There are 12 pairs of cranial nerves that are part of the PNS. These nerves are sensory, mixed and mostly motor.
What happens when the nervous system get to cold?
Mag Hanap Kang Mabute At wag Ung Nangungula At Pag isipan Mouuh Kunq Matalino Ka ah
What cells in the peripheral nervous system that form a covering around axons?
Schwann cells wrap around the AXONS of peripheral neurons.
What causes failure of the nervous system?
the possible causes is when the body is loss of blood supply and cannot send information to any part of the body it collapse.
Will the central nervous system allows us to sense environment?
You CNS reacts in different ways to environment. For example if you are cold your brain will trigger a stimulus and give you goosebumps. Or round the other way, if you are hot then you will begin to sweat.
Neurotransmitter receptor sites on ligand-gated ion pores.
What is maintained by the Endocrine system and Nervous system?
Homeostasis, dynamic equilibrium, steady state, coordination, regulation, human body, and heart. It can be disrupted by parasites, fungi, bacteria and viruses.
Do your eyes tell your nervous system slow to respond to information they receive?
It's the brain. the brain controlls everything and is apart of the core nervus ststem. and there it collects all the information.
Where can both sensory and motor fibers be found together?
Mixed nerves like the spinal nerves have both sensory afferents and motor efferents.
Breathing is a function controlled by the autonomic nervous system?
The nervous system controls breathing rate.
How The Nervous System Functions In This Reflex Action?
Firstly your receptor cells pick up a stimuli and sends an electrical impulse along the sensory neurone's axon to the spinal cord.the impulse is then passed onto the relay neurons IN the CNS(the spinal cord decides what to do but the brain is also informed).
The relay neurone then passes the command from the spinal cord in the form if an impulse to the motor neurone.the impulse travels along its axon to the effector.
Hope it helps
P.S. •relay neurones exist only within the CNS and not outside it.
•reflex arcs take the shortest possible route
What is the function of the two groups of nerves making up the peripheral nervous system?
Somatic nervous system: Associated with the voluntary control of body movements via skeletal muscles Autonomic nervous system:operates independently of voluntary control, although certain events, such as emotional stress, fear, sexual excitement, and alterations in the sleep-wakefulness cycle, change the level of autonomic activity.
Sensory neurons
Neurotransmittor for the sympathetic nervous system?
The neurotransmitter for sympathetic nervous system is norepinephrine (or also called noradrenaline) that acts on adrenergic receptors of the effector organ (alpha 1, beta 1, beta 2 receptors). The adrenergic receptors are G-protein coupled.
What determines whether a neuron will have an action potential triggered?
The effect upon the target neuron is determined not by the source neuron or by the neurotransmitter, but by the type of receptor that is activated. A neurotransmitter can be thought of as a key, and a receptor as a lock: the same type of key can here be used to open many different types of locks. Receptors can be classified broadly as excitatory(causing an increase in firing rate),inhibitory(causing a decrease in firing rate), or modulatory(causing long-lasting effects not directly related to firing rate).
Do psychotropic drug acts primarily on the central nervous system?
A psychotropic drug acts primarily on the central nervous system (CNS), where it produces temporary changes affecting the mind, emotions, and behavior. These drugs are used as medications to control pain, and to treat narcolepsy and attention disorders.
How signals move through the nervous system?
In the nervous system, electrical signals travel throughout the brain and into the body via nerves and nerve fibers. Electrical signals are how the brain tells the body what it should do.
