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ch 11-15
| Question | Answer |
|---|---|
| The all or none phenomenon, as applied to nerve conduction, states that the whole nerve cell must be stimulated for conduction | False |
| The central nervous system consists of the brain, the spinal cord, the cranial nerves, and the peripheral nerves. | False |
| The electrochemical gradient has two components: concentration gradient and electrical gradient | True |
| Strong stimuli cause the amplitude of action potentials generated to increase | False Does not cause the amplitude |
| The action potential is caused by permeability changes in the plasma membrane | True |
| The peripheral nervous system is divided into the afferent and efferent divisions | True |
| Retrograde movement is the movement away from the cell body | False Toward cell body |
| Neurotransmitter effects are terminated by reuptake through transport proteins only. | False |
| Unipolar neurons have axons structurally divided into peripheral and central processes | True |
| A stimulus traveling toward a synapse appears to open calcium ion channels at the presynaptic end, which in turns promotes fusion of synaptic vesicles to the axonal membrabe | True |
| A postsynaptic potential is a graded potential that is the result of a neurotransmitter released into the synapse between two neurons. | True |
| Enkephalins and endorphins are peptides that act like morphine | True |
| During depolarization, the inside of the neuron's membrane becomes less negative | True |
| Cell bodies of sensory neurons may be located in ganglia lying outside the central nervous system | True |
| The somatic nervous system is the part of the nervous system that conducts impulses from the CNS to the skeletal muscle | True |
| Microglial cells become macrophages tot he phagocytize the microbes and neuronal debris which proves vital because cells of the immune systems are denied access to CNS | True |
| Synaptic delay reflects the time needed for neurotransmitter release, diffusion across the synaptic cleft, and binding to receptors | True |
| The importance of a stimulus is derived from the number of stimuli received from the same source. The frequency of impulse transmission shows the stimulus intensity, and the brain responds appropriately | True |
| Short distance depolarization describes the excitatory postsynaptic potential | True |
| Tactile sensation combines touch, pressure, stretch, and vibration primarily due to mechanorecptors | True |
| Proprioceptors are responsible for the human's ability to touch our finger to our nose while our eyes are closes, in part because we can sense the position and movement of our joints and the length of stretch in our muslces. The sensations create awarenes | True |
| The best explanation of how a stimulus's strength is transmitted to the central nervous system from sensory nerves is that action potential frequency increases as stimulus strength increases | False |
| An emergency medical technician examines a trauma victim by shining a pen light into her patients eye. She records the reactivity of the patients pupils as they constrict when stimulated by the light. This test supports the function of the oculomotor nerv | True |
| The second cranial nerve forms a chiasma at the base of the brain for partial crossover of a neural fibers | True |
| A patients suffering from the inability to distinguish various types of odors which could be due to damage to vagus nerve (x) | False |
| The meningeal branch of a spinal nerve actually reenters the vertebral canal to innervate the meninges and blood vessels | True |
| Dorsal and ventral rami are similar in containing sensory and motor fibers | True |
| Complicated interlacing of the ventral rami form networks called nerve plexus. The crisscrossing of the nerve fibers from the various spinal nerves is advantageous because injury to any spinal nerve will be less damaging as there is a less chance of total | True |
| Irritation of the phrenic nerve may cause diaphragm spams called hiccups | True |
| A mechanic who works with vibrating tools. He also exerts force on his wrists when twisting wrenches and screws. Bill has a tingling sensation in the lateral portion of his hand. Doctor suspects carpal tunnel syndrome | true |
| The musculocutaneous nerve is a major nerve of the brachial plexus | True |
| Reciprocal inhibition means that while one sensory nerve is stimulated, another sensory neuron for synergistic muscles in the same area is inhibited and cannot respond | False |
| Drooping of the upper eyelid, and double vision are potential symptoms of damage to the olfactory nerve | False |
| Photoreceptors respond to chemicals in a solution (molecules smelled or tasted), or changes in blood or interstitial fluid chemistry | False |
| A patient has lost the ability to taste food his facial nerve may be damaged | True |
| A Person has made an appointment to receive a deep tissue therapeutic massage. The massage stimulates the lamellae corpuscles | True |
| Lamellar corpuscles can only be exteroceptors or proprioceptors | False |
| Thermoreceptors, also known as exteroceptors, respond to changes in room temperature and are found in the skin | True |
| If someone spills hot very hot coffee on their skin they will... | True |
| Most blood vessels are innervated by the sympathetic division alone. | True |
| Somatic & visceral reflex arcs are similar, but visceral reflex arcs lack afferent fibers. | False They both contain afferent fibers |
| All splanchnic nerves are sympathetic | False |
| Pelvic splanchnic are parasympathetic | True |
| The parasympathetic neuron division mediates thermoregulatory responses to increase heat | False |
| Most splanchnic nerves pass through the abdominal aortic plexus | True |
| The gray cami communicates of eliminated post ganglionic fibers | False |
| The sympathetic & Parasympathetic divisions of the ANS have the same effect on most body organ systems. | False |
| Parasympathetic promotes maintenance and conserves energy & Sympathetic mobilizes the body during activity | True |
| The parasympathetic division innervates more organs than the sympathetic division | False Sympathetic division innervates more |
| The rami communicantes are associated only with the sympathetic division of the ANS | False |
| Syncope is a temporary loss of consciousness that usually reflects inadequate blood delivery to the brain | true |
| Specific motor and sensory functions are localized in specific areas called domains, whereas memory and language have overlapping domains | True |
| The adult spinal cord ends between the level L and L , of the vertebral column | True |
| Neural plasticity is the ability of the brain to change its function by changing its structure | True |
| The limbic system acts as our emotional, or affective (feelings) brain | True |
| The primary visual cortex contains a map of visual space | True |
| Sorting of sensory information and relaying it to the appropriate cerebral sensory area occurs in the hypothalamus | False |
| Projection fibers in the brain mainly connect the right and left hemispheres | False |
| The canal connecting the third and fourth ventricles and running through the midbrain is the interventricular foramen | False |
| Commissural fibers connect the cerebrum to the diencephalon | False |
Created by:
srgcrmn