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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 shape is the hypothalamus?
Well, first of all, it's below the thalamus (I guess that's how it got it's name) and above the brain stem. It's very small. It resembles the shape of the size of an almond but the shape of a small pair of flip-flops stuck together or a mini-brain.
They Transfer signals from the various places in your body to your brain to process and then to fire a signal back for them to shock the muscles into movement, without nerve signals you cant walk, which is why if you break your spine (the central nervos system) you are most likely to be dead from the waist down, or from the chin down depending where you break it.
Which of the following is an antagonistic interaction of the sympathetic nervous system?
Increased cognitive functioning
Edit: FALSE. Increased cognitive functioning is NOT an antagonistic interaction of the sympathetic nervous system.
What region of the body is served by the ventral rami of spinal nerves?
The ventral rami serves as a form of intercostal nerves, which supply the muscles between the ribs and the skin and muscles of the anterior and lateral trunk.
Which Nerve ending is located in a tendon and protects against overcontracting?
The internal tendon bulk is thought to contain no nerve fibres, but the epitenon and paratenon contain nerve endings, while Golgi tendon organs are present at the junction between tendon and muscle.
What theory says that the ability to form memories has to do with how deeply you process the memory?
Levels of processing theory
How does your sympathetic nervous system use feedback to keep you healthy?
It speeds up your heart rate to help you deal with danger.
How fast are hormonal responses?
Slower than nervous responses.
Varies according to what hormone, for example the hormone epinephrine (adrenaline) works almost instantaneously to initiate increased mental alertness among other things. Some hormones take longer to take effect but most take action relatively quickly seconds -> hour
What are sedative hypnotics and how do they affect the central nervous system?
i don't care and my favorite color is purple oh yeah and i am twelve years old and i don't care about this freaking question
Are the digestive tract and heart enervated by the sympathetic nervous system?
Digestive system has got own local nervous system in the form of myenteric plexus. But then it is supplied by vagus nerve, the tenth cranial nerve, that comes down all the way from your skull. It has got powerful influence on your digestive system. Only terminal part of digestive system gets it's parasympathetic nervous supply from the sacral autonomic outflow.
What does rest do for the nervous system?
The rest of the nervous system follows the instructions of the main part that makes the decisions. The main part is the brain, spinal cord, and other interneurons. The rest of the nervous system is called the peripheral nervous system and it mainly receives stimuli with sensory neurons, and sends signals for movement with motor neurons.
form a hypothesis first.
How is the message caried from one neuron to another it there is a space between them?
The synaptic gap is the space between the dendrites of one neuron and the axon of the next. The impulse is carried across this space by chemicals called neurotransmitters which conduct the electrical impulse.
Are there more than one afferent neuron that will send a message to the brain?
No afferent neuron simply refers to any neuron bringing information to the brain. There are tons of afferent neurons bringing signals from all different parts and organs of the body. One neuron is not able to transfer all of the action potentials from the entire body through it, and thus many are needed.
Explain how the nervous system and the endocrine system work together when adrenaline is released?
The sense of danger or anger are feelings registered by the nervous system which cause the release of adrenalin. Likewise, it is the adrenaline that prepares you to fight or to flee and helps you to focus your thoughts.
Neuromuscular
