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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
Similarities and differences of earthworm and human Nervous system?
The similarities between the earthworm and human nervous system is that they are carbon based. The difference is that the humans nervous system is skeletal while that of the earthworm is not.
What two functional characteristics are highly developed in neurons?
Speicalized cells that conduct messages in the form of nerve impulses from one part of the body to another.
1. they have extrem longevity-given good nutrition neurons can function optimally for a lifetime
2. They are amitotic- Neurons assume their roles as communicating links of the nervous system, they lose their ability to divide.
Speicalized cells that conduct messages in the form of nerve impulses from one part of the body to another.
1. they have extrem longevity-given good nutrition neurons can function optimally for a lifetime
2. They are amitotic- Neurons assume their roles as communicating links of the nervous system, they lose their ability to divide.
Speicalized cells that conduct messages in the form of nerve impulses from one part of the body to another.
1. they have extrem longevity-given good nutrition neurons can function optimally for a lifetime
2. They are amitotic- Neurons assume their roles as communicating links of the nervous system, they lose their ability to divide.
Irritability and conductivity are their two major functional characteristics.
The tiny space between the axon terminal and the dendrite of another neuron is called the?
Synaptic Cleft.
What are some good things to do when you're nervous?
Close your eyes, try to inhale and ehale deeply, deep breaths for 5- 10 minutes Think of something that makes you better for few minutes, like the ocean or painting or what you will do after work or on the weekend.
Take a walk, Try to calm yourself, even if its a one minute circle of your cubicle, go to the bathroom
draw something
massage your temples
Do NOT drink or eat or smoke to feel better. You'll wake up with a massive headache if u get drunk, or just feel guilty after you've ate or smoked.
What is the function of the nervouse system?
The function of the nervouse system is to feel (touch), or feeling pain in the body. Skin, Hair, Nails.
The functions of the nervouse system is to carry messages to and from the brain, spinal cord, and all other parts of the body.The nervous system tells the body how to respond to the environment for example: when you put your hand on the stove the brain sends a message through your nervs so that you can feel the burn and get your hand off the stove.
What is the major organ of the nervous system?
The nervous system is influenced mainly by the brain, brain stem, spinal cord and special cells called neurons.
The brain and spinal cord are the two main components of the central nervous system (although the spinal cord isn't technically an organ). The skin could also be considered an important organ of the nervous system.
What system controls the body's response to change in its internal and external enviorment?
Motor neurons of the nervous system are what innervate muscles and glands.
How is the electrical charge inside the neuron?
Neurons send messages electrochemically and all chemicals in the body are electrically-charged. When neurons inside the body are electrically-charged, they are called ions. When a neuron is at rest, or not electrically-charged, the inside is negative and the outside is positive.
What does compression of the median nerve cause?
Compression of the median nerve causes tingling and numbness in the thumb, forefinger, middle finger and on the thumb-side of the fourth finger. It may also cause pain in the forearm and occasionally into the shoulder.
What part of the brain does the vagus nerve originate?
The vagus nerve arises as a group of rootlets on the anterolateral surface of the medulla oblongata.
What nerve is carrying the afferent and efferent impulses during the patellar reflex?
The nerves innervate the quadriceps. The afferent nerves are the muscle spindles and the efferent are the motor neurons.
What are name of the nerves that found in the nervous system?
There are different types of nerves in the human body namely: the cranial nerves, the spinal nerves, the sympathetic nerves, and the encephalon nerves just but to mention a few. Examples of these nerves includes: the optic nerve, the facial nerve, the vagus nerve, the thoracic nerve, and accessory nerve.
What is a group of drugs that depresses the activities of the central nervous system?
Barbiturates. Also, benzodiazepines, when administered in significant dosages.
How does the nervous system maintain homeostasis?
The nervous system maintains homeostasis by sending signals to the brain and the rest of the body.
The parasympathetic system counteracts the sympathetic system.
It sends messages that control all the systems in the body.
How does the respiratory system depend on the nervous system?
If you don't breathe the nervous system won't work
What is the basic unit of structure and function in the nervous system?
Vitreous Humor: fluid that fills the large central chamber of the eye. It helps focus light onto the retina.
. Retina: The inner most layer of the eyeball. It contains photoreceptor cells that transmit signals from the optic disc to the optic nerve.
Rods and Cones: Rods are sensitive to light but do not distinguish colors, where as cones are responsible for daytime color vision.
. Optic nerve: Nerve that connects the eye to the brain.
Blind spot: Area of the eye that does not contain any rod or cones. It is here that the eye is attached to the optic nerve.
Fovea: Area of the retina that contains the highest concentration of cones. Does not contain any rods.
Ear: Parts of the ear:
. Pinna: The ear lobe which functions as a sound gatherer.
. Outer ear (canal): A canal that connects the outer ear with the ear drum (tympanic membrane).
Tympanic membrane: A thin piece of tissue that blocks off the outer and middle ear. It transmits sound waves to the three tiny bones of just behind it.
Hammer, anvil, and stirrup( middle ear): The three bones of the middle ear. They vibrate sending the impulses to the oval window of the cochlea.
Semicircular canals ( inner ear): Located in the inner ear and used in the sense of balance. The fluid in the canals move to notify the brain of any problems with the organisms balance.
. Cochlea: A coiled structure located in the middle ear containing tiny hairs that change sound waves into nerve impulses.
Auditory Nerve: Connects the ear with the brain
What system of the body is made of the brain and spinal cord and the nerves?
The system of the body is made of the brain spinal cord and nerves is known as the nervous system. The nervous system controls the body's voluntary and involuntary actions and transmits signals between different parts of its body.
What is the branch of medicine dealing with the nervous system and its disorders?
The branch dealing with the nervous system is know as Neurology.
The branch dealing with nervous people would be Psychology.
I wasn't 100 percent sure which one you meant.
What is the job of nerve tissue?
It carries electrical signals that affect muscle tissue.
The fourth primary type of tissue is nerve tissue. Nerve tissue is found in the brain, spinal cord, and accompanying nerves. The function of the nerve tissue is to move and coordinate bodily functions.
Nerve tissue is composed at two subtypes of tissue:
1. Specialized cells called neurons (nerve cells) receive stimuli and conduct impulses to and from all parts of the body
2. . Neuroglial or glial cells. Unlike bone, which is rigid, nerve tissue has a wet noodle-like compactness, and therefore must be supported by connective tissue. Some glial cells support neurons in the brain and spinal cord by entwining around them, while others bind neurons to other connective tissue. Both the brain and spinal cord are covered by three thin layers of tissue called meninges: the dura mater (external layer); the arachnoids (middle layer); and the pia mater (internal layer).
What three Cranial nerve is involved in rolling the eyes?
Eye movement is controlled by cranial nerves III, IV, and VI (Oculomotor, Trohlear, and Abducens, respectively). CN III innervates most of the muscles of the eye and is responsible for most eye movements.
Marijuana effects on the nervous system?
By taking illegal drugs this effect our brain, our brain becomes weak and we are not able to control what we are doing. We will loose many blood cells and because of that, our brain is beginning to play mind games with us. You can see when somebody has taken cannabis because they begin to show slow reactions and unexpected giggling. In addition, illegal drugs effect our nervous system this shows off by shaking hands a lot and we are unable to stop it from doing so.
How long can a nerve cell be in the human body?
a nerve cell can be metres long so it has more area to Cary the nerve impulse away from the cell body.
What is the contractile tissue of the body?
There is no such thing. Were something non-contractile, it would cease to be called a muscle. You probably meant "What is a contractile muscle structure?" or something similar. There are many such answered questions on here.
