of communication of neurons in your nervous system. Also ionic channels are seen that they stimulate and they activate the cell to send electrical signals through central nervous system. Epilepsy is known as a brain disorder in which clusters of nerve cells or neurons in the brain sometimes transmit signals in an abnormal way. There have been diagnosed more than 30 types of seizures‚ which generally are divided into two types of such cases‚ focal seizures that affect only one side of the brain and
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flow out of the neuron. __4___ Positively charged ions flow into the neuron. __2___ The cell membrane potential is positive. __3___ The cell membrane potential is negative. 2. What is the "all or none" law? The muscle or nerves response completely or not at all Objective II.3 Identify the basic components of the synapse. Key Terms synapse Exercises 1. Which statement about the synapse is false? A a. The synapse is the
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provides longitudinal support as a component of the coccygeal ligament. A) conus medullaris B) filum terminale C) cauda equina D) dorsal root E) ventral root Answer: B 3) Spinal nerves are A) purely sensory. B) purely motor. C) both sensory and motor. D) interneuronal. E) involuntary. Answer: C 4) The spinal cord consists of five regions and ________ segments
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Leukodystrophies. These are disorders that cause abnormalities and the destruction of myelin‚ the “white matter” that protects nerve fibers in the brain. Myelin is essentially made up of water proteins and mostly lipids‚ it covers the axons of all neurons in the form of a myelin sheath as it helps insulate the nerve fibers and promotes rapid transmission of nerve impulses. Myelin is produced by two different types of Glial cells‚ Oligodendrocytes produce myelin in the central nervous system (Brain
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ANIMAL TISSUES 1. Classify the animal tissues. On the basis of the function they perform‚ animal tissues are classified into four different types. They are: i) Epithelial tissue ii) Connective tissue iii) Muscular tissue iv) Nervous tissue 2. What are epithelial tissues? What are the characteristic features of these tissues? The covering or protective tissues in the animal body are called epithelial tissues. They also perform the functions of secretion and absorption
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exposure to loud sounds can cause additional cochlear damage. The only way to prevent noise induced hearing loss is to limit exposure to loud sounds and wear ear protection. What happens when cochlear damage occurs? Thousands and thousands of tiny nerves called ‘hair cells’ line the inside of the snail-shaped structure‚ the cochlea. Each hair cell is responsible for picking up a different sound‚ sort of like keys on a piano‚ but on a much more detailed scale. All of the hair cells work in concert
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was functioning properly and was able to maintain her own rhythm the majority of the time. The problem was occasionally the nerve impulses from her brain to her heart were not able to connect. This miscommunication‚ so to speak‚ was causing her heart rate to drop and at times‚ stop. She was diagnosed with SSS or “Sick Sinus
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are not possible in the cardiac muscle tissue. a. Cardiac cells have long action potentials and long twitches‚ therefore do not show temporal summation. Act 2 1. Explain the effect that extreme vagus nerve stimulation had on the heart. a. The vagus nerve stimulation caused the heart to flat line restart and react normally. The response after the stimulation that resumed the heart is called the vagal escape. 2. The SA node of the heart is located in the right
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five stages: 1. The vagus nerve stimulate the sinoatrial node or SAN‚ which is the pacemaker of the heart. Is a small area in the upper wall of the Right atrium‚ close to the vena cava; the fibers of the of the SAN contract 70 times each minutes‚ and after that the impulse is disperse across the atrial cardiac muscle. 2. Simultaneous contraction occurs in both‚ the right and the left; that is mean between tricuspid and bicuspid valves. 3. The atria contraction sends impulses
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|Bipolar neurons |Unipolar neurons |Multipolar neurons | |transmit impulses generated by olfactory‚ visual‚ |Convey impulses from variety of specialized and |Transmit both sensory and motor nerve impulses | |vestibular‚ and auditory receptor endings ( sensory in|nonspecialized receptors | |
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