The "All or None" response means that: A stimulus causes depolarization and repolarization regardless of the strength of the stimulus ) There is no threshold for an electrical stimulus signal to reach before depolarization and repolarization O Potassium channels open for depolarization and sodium channels open for repolarization O A stimulus has to be strong enough for depolarization to occur followed by repolarization
Q: A reflex action :-a- is a fast brief response to a sensory stimulusb- is involved in regulation of…
A: The nervous system is an intricate network of neurons that allows us to respond to sensory…
Q: when a stimulus is applied for a prolonged period the rate of receptor discharge slows
A: Sensory adaptation is a phenomenon that occurs when the sensory receptors are exposed to stimuli for…
Q: Receptor adaptation results when:a. sensory neurons stop sending action potentialsb. a stimulus is…
A: Receptor adaptation refers to a gradual decrease in the stimulus-response of the body after constant…
Q: Neurons with ___ receptive fields would respond best to ____ spatial frequencies. A large; low…
A: Neurons are the structural and functional units of the nervous system. The nervous system regulates…
Q: Sensory receptor cells transduce physical or chemical stimuli: a) by limiting action potentials b)…
A: Answer is Option (e) into a change in the membrane potential of the sensory receptor cells
Q: Which of the following is the most direct result of depolarizingthe presynaptic membrane of an axon…
A: Neurotransmitters refer to the endogenous chemicals, which enable neurotransmission. These are the…
Q: hat is a receptor (generator) potential?
A: When a stimulus having greater strength than threshold strength is applied to a receptor than the…
Q: This question asks you about a typical neuron and NOT photoreceptors. As stimulus intensity is…
A: 1. This question asks you about a typical neuron and NOT photoreceptors. As stimulus intensity is…
Q: Certain cells in the retina respond differently to the direction in which objects move. To…
A: A retinal ganglion cell (RGC) :- is a kind of neuron which is found near the inner surface of the…
Q: Select the statement that best describes how the nervous system encodes sensory input. a. Neural…
A: The study of the hypothetical relationship between the stimulus and individual or ensemble neuronal…
Q: These sensory receptors when activated result in the movement of both calcium and sodiujm ions…
A: Sensory receptors play a key role in responding to stimuli. They can sense different sensations like…
Q: Which of the following stimuli (s) produces a propagating depolarization?
A: The given question is about the action potential and membrane conduction. -the different types of…
Q: channels. Sound waves are most likely to open O a) ligand gated O b) mechanosensitive c) ion gated
A: Our cells are the structural and functional unit of life. To maintain the functions of the cells,…
Q: Which of the following presents the elements of a sensory system in the correct order? Select one: O…
A: As we know that sensory organs at the periphery of body are the windows of the brain because it…
Q: Refers to the temporary time in which a neuron cannot be stimulated resting potential O refractory…
A: refractory period.
Q: The ___________________ provides electrical insulation that allows faster propagation of nerve…
A: Myelin sheath forms the insulating layer around neurons of brain and spinal cord. Myelinated axon is…
Q: Which of the following conduct sensory impulses to theCNS from receptors in muscle or skin?a.…
A: In physiology, sensory impulses are defined as the mechanism or phenomenon of two phases which are…
Q: Which sensory processing principle listed below best explains why we detect heat sensation when…
A: Sensory perception refers to an individual or organism's ability to process stimuli in their…
Q: Hair cells in the cochlea initially become depolarized at the opening of ion channels that exhibit:…
A: During depolarization, membrane potential shifts from negative to positive. During repolarization,…
Q: Which of the following statements about a sensory cell is FALSE? O a. They can become insensitive to…
A: Sensory cells are specialized cells that contain specific receptors that are capable of detecting…
Q: a. sensory neurons b. cell body c. Schwann cell d. axon e. motor neurons f. sodium g. processing…
A: 81) sensory neurons are responsible for detecting stimulus 82) processing/inter neurons are…
Q: All afferent signals travel what direction? O None of these is correct O Toward a muscle Toward the…
A: All afferent signals travel towards central nervous system.
Q: If your body was transmitting a signal between hemispheres of the brain, the signal would travel O…
A: If your body was transmitting a signal between hemispheres of the brain, the signal would travel A.…
Q: a) What channels are open at 3 if this was recorded on the axon of a sensory neuron? 1. K+ voltage…
A: The term action potential refers to the electrical form of signals which are used for the…
Q: The central nervous system (CNS) processes sensory input and transmits the impulses through the…
A: The brain, spinal cord, and cerebellum make up the central nervous system (CNS).
Q: EEG used to measure the activity of : * Heart O Brain O Muscle O Eye movement O Others As…
A: The electroencephalogram (EEG) is a clinical trial which used to compute the electrical activity of…
Q: The conduction velocity in nerves is primarily dependent on the O localization of the Na+ / K+ pumps…
A: Nerve conduction velocity (CV) is an important aspect of nerve conduction studies. It is the speed…
Q: In a reflex response, such as if you touched a hot stove: O It involves decision making O It…
A: In order to generate a reflex, nerve impulses follow a path, and this path is known as the Reflex…
Q: Photoreceptors in the retina have special channels that are open to Na+ in the darR. When light hits…
A: Photoreceptors, are specelized cells for the detection of light. It consists of two types of cells…
Q: Which one of the following is entirely located within the central nervous system? Multiple Choice…
A: Which one of the following is entirely located within the central nervous system.
Q: Opening voltage-gated potassium ion channels will allow potassium ions to O enter, repolarization…
A: There are various potassium channels such as voltage-gated potassium channel, calcium-activated…
Q: If you present a stimulus that is within a neuron's receptive field, what will happen? O The neuron…
A: Specific organisms have restricted sensory space or receptive field that is capable of evoking…
Q: Which of the following is not correct about myelin sheaths? Select one O A. They are formed by glial…
A: The myelin sheath is the protective layer around the nerves. It acts as an electrical insulator and…
Q: Sensory neurons transmit information towards the central nervous system. Which of the following is…
A: Sensory neurons brings information from inside and outside of the body to CNS. Motor neurons brings…
Q: pin can be pressed against the skin lightly and elicit no response from the pain receptor. However,…
A: An action potential is called an impulse. Its generation depends on opening and closing of…
Q: Which of the following presents the elements of a sensory system in the correct order? Select one:…
A: It is a part of nervous system that processes sensory information. It contains parts of brain,…
Q: When stimulated by effective steady stimuli, sensory receptors :-a- continuously discharge…
A: Introduction Sensory receptors are those receptors which perceive the signals from the outer…
Q: Photoreceptor cells in the retina of the eye convert visible light into signals. They have special…
A: The the rod and cone cells in the retina are responsible for sensing the dim and colour vision…
Q: Receptor potential generates :-a- an electrotonic current which is transmitted along sensory fibers…
A: Given: Receptor potential generates :-a- an electrotonic current which is transmitted along sensory…
Q: The ability to localize the site of stimuli depends upon :-a- the type of the stimulated receptorb-…
A: Stimuli is a change in the physical or chemical structure of an organism's internal or external…
Q: What does a mechanically gated channel respond to?a. physical stimulusb. chemical stimulusc.…
A: Cell is the smallest structural and, functional unit of life. It is simple machinery that houses all…
Q: Slowly adapting receptors differ from rapidly adapting receptors in :-a- stopping to discharge after…
A: The receptors are sensitive sites present on the cell membrane that can be activated by the stimuli.…
Q: Sensory occurs when a receptor becomes so accustomed to the stimulation that it stops generating…
A: Adaptation
Q: ing of potassium (K+) channels on dendrites of a postsynaptic neuron will have what effect? A)…
A: Opening and closing of ion channels on the membrane leads to the Hyperpolarisation and…
Q: Signal detection theory suggests that deciding whether a stimulus is present depends partly on the…
A: Signal detection theory is a means to measure the ability to differentiate between…
Q: Which of the following would result in no movement (i.e. no activation of the mo cortex)?…
A:
Q: making the K equilibrium potential less negative making the K equilibrium potential more negative…
A: Threshold cell membrane potential is observed when sodium permeability is increased to the point…
Q: he following graph represents a membrane potential recording in the dark, then during a brief flash…
A: During Dark cGMP concentration high which causes open cGMP gated Na channel . Thus Na ions enters in…
Q: Once initiated, the receptor potential :-a- spreads to a long distance along the sensory nerve…
A: The receptor potential is a graded potential that is also called the generator potential. It is the…
Q: Which type of gates are located in the dendrite membrane of the post-synaptic cell? O…
A: Branched extension of a neuron is called Dendrites , the electric signals emitted from projecting…
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- What is meant by the modality of a stimulus? Give someexamplesAction potential frequency in phasic receptors with a prolonged stimulus action potential frequency in tonic receptars with a prolonged stimulus. Greater than Less than Equal toThe conduction velocity in nerves is primarily dependent on the O localization of the Na+ / K+ pumps intensity and duration of the stimulus myelination and fiber diameter O fiber length and myelination O fiber length and fiber diameter
- when a stimulus is applied for a prolonged period the rate of receptor discharge slowsIf the response to a stimulus is a change from a negative potential to a less negative potential, the change is called: stimulus response Repolarization Depolarization Stimulus recoveryA specific stimulus produces a receptor potential by :-a- inhibiting Na + influx into receptorb- inhibiting K + efflux from receptorc- enhancing Na + influx into receptord- enhancing K + efflux from receptor
- Compared to an action potential, a graded potential is weak and depending on the stimulus strength will dissipate away from the stimulus. O is weak and depending on the stimulus strength will maintain its strength as it travels. O is all-or-none, and maintains it strength as it travels. O is all-or-none but weakens as it travels.Indicate whether each of the following is an example of sensory transduction or transmission. lon channels in a sensory v [ Choose ] cell in the skin open in transmission response to a change in transduction temperature. The membrane potential in [ Choose ] the dendrites of a touch receptor moves toward 0 mV An action potential is [ Choose ] carried along a sensory neuron toward the brainThe role of γ-motor neurons in regulation of equilibrium is achieved by :-a- initiating contraction of spindle fibers which directly antagonize postural deviationb- increasing spindle sensitivity to stretchc- directly stimulating extrafusal muscle fibers to antagonize postural deviationd- directly adjusting the discharge of α-motor neurons innervating the extrafusal muscle fibers to antagonize postural deviation
- The following were extracellular recordings obtained from the giant nerve fibers of an earthworm after delivery of a depolarizing stimulus at the time indicated. Which of the following letters corresponds with the fiber that had the fastest action potential conduction velocity? I OA 0.05 0 -0.05 -0.1. + Action Potential 0.024 B W 0.002 0.004 stimulus delivered A OB OC None of the above are correct; all had the same conduction velocity 0.006 C 0.008 0.01Action potentials are generated at receptor sites. If you touch an object that is rough, which one of these structures on a sensory neuron, will be stimulated first and begin the process of sodium entry via chemically gated channels into the nerve cell? O dendrites axons O synaptic terminals cell body of the neuron *Previous NextFigure Ql shows the typical electrical recording of movement artifacts during the resting potential and also the action potential when an adequate stimulus is delivered. Potential overshoot (, > 0) Movement artifact Action potential -80 Stimulus artifact Resting potential Figure Ql In your own words, discuss the phenomena occur during the resting state and active state until the equilibrium potential is established. (a) Membrane potential (m), mV