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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
How many cranial nerves do cats have?
The number of cranial nerves that a cat have is 12. The cranial nerves are mostly located at the cats brain.
Where does processing of information occur in the nervous system?
only when your organs rise up and your brain is put under stress.
The sympathetic and parasympathetic nervous systems are part of the autonomic nervous system (ANS) which innervates (supplies) smooth muscle, glands, and cardiac muscle.
- The sympathetic (thoracolumbar) nervous system deals with the fight-or-flight response. It gets the body ready to deal with emergency situations by increasing heart rate, dilating the pupils and airways, decreasing digestive tract motility, and stimulating adrenal glands and sweat glands.
- The parasympathetic (craniosacral) nervous system restores the body to homeostasis after a stressful or traumatic event/situation. It stimulates the body to decrease heart rate, increase digestive tract motility, constrict pupils, produce tears and saliva, and stimulate thoracic and abdominal viscera.
What is the structure of the autonomic nervous system?
The autonomic nervous system is a division of the peripheral nervous system, which is a subdivision on the nervous system as a whole. which also included the central nervous system.
The autonomic division is responsible for involuntary processes in the body, such as maintaining blood pressure, heart rate, respiration, digestion, and other metabolic processes that contribute to homeostasis.
The prime ruler of the autonomic nervous system (ANS) is the hypothalamus which is located above the pituitary gland. The hypothalamus is also known as the Master glad
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How many spinal disks are there in human body?
"http://wiki.answers.com/Q/How_many_spinal_disks_are_there_in_human_body
What bone protects the major organ of the nervous system?
The cranium (skull) is the collection of bones that protects the brain, which is the major organ of the nervous system.
What is the human body's automatic response to the environment?
An automatic response to the environment is a reflex
Where are the nuclei of the cranial nerves V VI and VII found?
All cells in the body have similar structures. All of them have a cellular semipermeable membrane, cytoplasm, and organelles. Most cells, and all nerve cells, have nuclei, which is the plural of nucleus. All nerve cells, or neurons have one single nucleus, including cranial nerves. The job of the nucleus is to be the control center, and in the case of neurons, they decide when an impulse should be sent down along its axon.
What is the function of spinal nerves- afferent?
They carry nerve impulses from your sensory organs, like your eyes, to your brain, or your central nervous system (CNS). When your eyes see something shiny on the ground, your afferent nerves tell your brain what your eyes see. In contrast, efferent nerves carry nerve impulses from your brain to parts of your body. So, when you see something shiny on the ground, your brain tells you to pick it up and look at it. Efferent = "Exiting", the nerves impulses are exiting your brain. Afferent = the opposite
A small space across which an impulse travels to move from one neuron to another?
It is most definitely a synapse.
In terms of the nervous system, muscles and glands are given the generic term effector organs. Impulses are picked up from receptors, which then travel to the brain, which sends orders along the motor neurons to these effector organs. In the case of reflex actions, however, the brain is not involved, and the process is done much faster as a result.
Which system does clostridium botulinum effect?
Botulism affects many body parts because it can cause blurred vision, weak muscles, stomach cramping, nausea, and difficulty of breathing.
Is the nervous system divided into three major parts?
The nervous system is divided into two parts:
I. Central Nervous System
a. Brain
b. Spinal Cord
II. Peripheral Nervous System
a. Somatic Nervous System (voluntary muscle movements)
b. Autonomic Nervous System (involuntary muscle movements)
1. Sympathetic Nervous System (flight or fight)
2. Parasympathetic Nervous System (rest and digest)
What part of a runner's nervous system get her ready to go at the sound of the starting gun?
sympathetic
What regions does the ventral rami of the spinal nerves form nerve plexuses?
Cervical- diaphragm & muscles of shoulder & neck
brachial- deltoid muscle of shoulder, triceps & extensor muscles of forearm, flexor muscles of forearm & some muscles of hand, flexor muscles of arm, wrist & many hand muscles
lumbar- lower abdomen, buttocks, anterior thighs, and skin of anteromedial leg & thigh, adductor muscles of medial thigh & small hip muscles; skin of medial thigh & hip joint
sacral- lower trunk & posterior surface of thigh & leg, lateral aspect of leg & foot, posterior aspect of leg & foot, gluteus muscles of hip
Sensory images are images created in your head from a very detailed description of something, often using more than one of the five senses (sight, smell, taste, touch, and hearing). Also, the sensory images can be what you imagine in your head as you read the story you image what is happening in the book or poem or story its the little TV inside you.
What are the vast majority of neurons in the body and nervous system?
Intraneurons are the vast majority of cells in the body's information processing system. Located in the central nervous system, the intraneurons connect nerve cells that govern coordinating activities.
The midbrain pons and medulla oblongata are housed in the?
the brain stem; they continue upward from the spinal cord in this order: medulla, pons, midbrain.
Does the nerve belong to the peripheral nervous system?
Yes it is. Reflex arcs include at least two neurons. The sensory neurons taking information into the cord and motor neurons taking information out. This happens, for example, when you touch a hot object and your arm jerks away. Also there can be an addition neuron that is somewhat slower that "reports" the incident to the brain. It is called an interneuron. It is located between the first two.
