Let's say you are at the dentist and you need numbing, so Lidocaine is used. Ahhh, you feel nothing.The reason you feel nothing is because the Lidocaineblocks K channels from openingO blocks the sodium channel from opening correctlyuses chlorine to hyperpolarize the membranestops Ca from reaching the nerve

Anesthesia is used to block pain sensations. It is of two types namely local and general. Local…

Let's say you are at the dentist and you need numbing, so Lidocaine is used. Ahhh, you feel nothing. The reason you feel nothing is because the Lidocaine O blocks K channels from opening O blocks the sodium channel from opening correctly O uses chlorine to hyperpolarize the membrane stops Ca from reaching the nerve

Let's say you are at the dentist and you need numbing, so Lidocaine is used. Ahhh, you feel nothing. The reason you feel nothing is because the Lidocaine O blocks K channels from opening O blocks the sodium channel from opening correctly O uses chlorine to hyperpolarize the membrane stops Ca from reaching the nerve

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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A patient with chronic right shoulder pain has learned that the use of imagery and guided meditation has helped control his pain. A family member asks how these techniques can help with pain. The nurse replies that these therapies can slow the release of transmitter chemicals in the dorsal horn change the cognitive and affective thoughts about the pain prevent transmission of nociceptive stimuli to the brain increase the modulating effect of the efferent pathways
examples are of pain blocking drugs are ketamine and propofol. Ketamine decreases the function of NMDA receptors and propofol increases the function of GABA receptors. Why do you both of these drugs block pain, when they have opposite effects on the receptors they bind to?
In which of these organs/tissues would you find alpha-1 or beta-1 adrenergic receptors? Select all that apply. The heart The digestive tract O Bronchioles Blood vessels
What is the function of the axon? to receive information and information into the cell body O to store genetic material and act as the metabolic centre of the neuron O to transmit information away from the soma to other neurons O to separate one neuron from neighbouring neurons
Select the most appropriate structure that fits the best in the paragraph. a. pupil b. spinal cord c. optic chiasma d. cauda equina e. prefrontal cortex f. retina g. ventral h. visual cortex I. primary motor cortex j. cones k. dorsal L. lateral geniculate nucleus m. premotor area n. rods О. Broca p. visual association area q. optic tract r. bipolar cells s. medial geniculate nucleus t. Optic
Researchers have designed a neuron that's unable to produce and release neurotransmitters. Can that neuron still have an action potential? Choose the answer with the correct answer and the correct reasoning. O No, action potentials need neurotransmitters to increase message speed O No, a neuron can't receive messages without its own neurotransmitters O No, a lack of neurotransmitters would leave a neuron unmyelinated O No, action potentials don't occur in the axon O Yes, action potentials don't require neurotransmitters:
Part II. The parts of an action potential. The following is a diagram of an action potential in a neuron. | +40 Voltage (mV) -55 -70 Threshold 0 a. b. C. Stimulus 1 Action potential Depolarization Repolarization Failed initiations 2 3 Time (ms) Resting state Refractory period Between the stars, what would be the gating mechanism of the sodium channels if this was an olfactory receptor cell? Between the star and smiley, what types of channels are opening, AND what is their gating mechanism? Between the smiley and heart, gated channels open. gated channels close and
Which of the following would be part of a sympathetic nervous system response? O dilatation of bronchioles in the lungs O lowering blood pressure O dilating (opening up) blood vessels in the erectile tissue of reproductive organs O contraction of the bladder wall O none of the above Next « Previous
What causes NMDA receptors to open? Glutamate binding and depolarization of the membrane Glutamate binding O Depolarization of the membrane O GABA binding
When stimulated by effective steady stimuli, sensory receptors :-a- continuously discharge impulsesb- stop discharging after a short timec- produce an initial high rate of impulse discharge followed by decline of this rated- differ in their response ; some types discharge continuously, while other types do not respond at all
27.
Taste buds are sensory receptors for taste located on the tongue. When a person eats a spicy food, receptors on the tongue pick up a stimulus. The stimulus initiates the movement of ions across the membrane. If the threshold level is reached, an action potential is generated and a signal is sent to the brain telling the brain that the food is spicy. The reason that some individuals have a higher tolerance to spicy food than others is due to a difference in the a. duration of the refractory period b. number of Na+/K+ ion exchange pumps c. strength of the stimulus d. threshold level