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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
What part of the nervous system gets you ready to run a race?
The nervous system relies on signals from the brain to help us run.
Which finger's nerves connect to the heart?
The heart is innervated by parasympathetic and sympathetic fibers.
What happens if the hypothalamus is destroyed?
The hypothalamus controls a lot of different things in the human body so many things would happen if it was destroyed. You would lose the ability to control your body temperature, you would not know when you are hungry, and you would lose all behavior attachments.
How does the heart help the nervous system?
although the heartbeat is not controlled by the nervous system,the autonomic nervous system does influence the heart rate.
Are ganglia part of the central nervous system?
Yes, the PNS contains ganglia, cranial nerves, and spinal nerves.
How does information travel in the nervous system?
Neurons communicate with each other via 'synapses'. Let us consider an example of how this works. Say a neuron becomes excited because its antennae, which are called 'dendrites', have just received a number of inputs from neighbouring neurons. Say as a result of this it now 'fires an action potential'. This will involve a electrical pulse being sent from its cell body (the soma) all the way down its axon to the very end - the 'axon terminal'. This terminal has two main characteristics: 1) it stores and releases neurotransmitters; and 2) it comes into close apposition (not quite physical contact) with some process of another cell, usually a point on a dendritic branch (antenna). The tiny gap between the axon terminal and the recipient cell is called a synapse, or 'synaptic cleft'. As soon as the electrical impulse reaches the terminal, neurochemicals will be released into the synaptic cleft where they will diffuse a very short distance and bind to 'post-synaptic receptors' on the recipient cell's dendrite (or in some cases, its cell body). These chemicals are the 'inputs' that were referred to in the beginning of this example. And on and on it goes. The synapse is the point of exchange - the neurochemicals are the messengers. by sending signals
by sending substances across a tiny gap between them
What is the systematic nervous system?
The nerves of the somatic nervous system control voluntary actions - activities you can choose to do or not to do. The function of the somatic nervous system is to regulate the movement of the body. The somatic nervous system forms part of the peripheral nerves in the body.
What are the functions of the peripheral nervous system?
Question 1. What is the nervous system in age related ? Why do these age related changes in brain structure, metabolism, and function occur ? Question 2. How to affects special senses and characterize intrinsic age related changes?
Types of hormones and their function?
Primarily produced in your endocrine glands, hormones manage and control everything in your body. From your immune response to your energy output, it regulates your blood-sugar level, maintains the critical balance among your body's electrolytes, and enables you to build strong healthy bones, it determines how you mature and how slowly or quickly you age. Because of them, women are able to become pregnant and carry a baby. It helps you digest and assimilate your food, convert it into energy, and then use the energy to build muscles or burn fat. And remarkably, your endocrine system monitors not only what is going on inside you but also what's going on around you. It interprets what you see and experience and translates it into physical reactions in your body, enabling you to adapt to change and to cope with stresses of all kinds.
- Thyroid hormones: Insulin, Adrenaline, Calcitonin
- Sex hormones: Estrogen, Progesterone, Testosterone, Dehydroepiandrosterone (DHEA)
- Pineal hormone: melatonin
How is the central nervous system protected from injury?
The meningesis the system of membranes which envelops the central nervous system. In mammals, the meninges consist of three layers: thedura mater, the arachnoid mater, and the pia mater. The primary function of the meninges and of the cerebrospinal fluid is to protect the central nervous system.
Can too much oxygen be deadly for the human body?
- Yup. Here are some of the problems that can happen:
- Pulmonary edema (intensive-care patients on breathing machines at 30 hours or more exposure)
- Decreases in the rate of gas exchange across the alveoli (intensive-care patients on breathing machines at 30 hours of exposure)
- Chest pains that were worse during deep breathing (volunteers with 24 hours of exposure)
- Decrease in the total volume of exchangeable air in the lung (vital capacity) by 17 percent (volunteers with 24 hours of exposure)
- Local areas of collapsed alveoli when plugged by mucus, a condition called atelectasis (patients, volunteers). The oxygen entrapped in the plugged alveolus gets absorbed into the blood, no gas is left to keep the plugged alveolus inflated and it collapses. Mucus plugs happen normally but are cleared by coughing. Also, if alveoli become plugged during air breathing, the nitrogen entrapped in the alveoli keeps them inflated.
- blindness caused by inadequate development of the capillaries in the lens and retina of the eye (premature infants). Reducing the oxygen to 40 percent can prevent this blindness.
What is impulse in the nervous system?
electrical wave conducted along the nerve generated by the voltage difference across the cell membrane of the nerve cells.
Functions of integumentary system?
The functions of the Integumentary system is that is serves to waterproof and protect your body, sensory, temperature regulation and vitamin D production
How does your nervous system help you with your reflexes?
If you are nervous your immune make more adrenalin. Adrenalin is a think, what makes u happyer stronger etc... So adrenalin also increase your reflexes. If you are nervous your immune make more adrenalin. Adrenalin is a think, what makes u happyer stronger etc... So adrenalin also increase your reflexes.
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.
