Choose the item in column 2 that best matches each item in column 1                                                                                              nodes of Ranvier                                                                                              resting membrane potential                                                                                              axon                                                                                              dendrite                                                                                              myelin sheath                                                                                              synapse                                                                                              nerve A. neuronal cell extension that propagates action potentials away from the cell body B. discontinuous insulation of an axon C. bundle of axons D. signaling junction between adjacent nerve cells E. gaps in the myelin sheath where electrical activity is concentrated F. excess of negative charge within the cell and excess of positive charge outside the cell G. neuronal cell extension that passively passes electrical signals toward the cell body

Q: neuron

A: An action potential is triggered by a graded potential that causes the membrane to depolarize until…

Q: Action potentials ____. Select one: A.can occur only once B.can move up or down an axon, away from…

A: Nervous system is the interconnection of neurons. They carry the message from one place and send to…

Q: Action potentials are normally initiated at the axon hillock because a. there is a particularly high…

A: When the membrane potential of a given cell location rapidly rises and falls, an action potential…

Q: The Na+/K+ ATPase pump is a. not required for action potential firing. b. important for…

A: Introduction  Chloride is the most abundant anion in the extracellular fluid. Along with Chloride…

Q: What guarantees that there are unidirectional action potentials? Choice A threshold  B.…

A: Action potential generates when the neurons want to pass the information along the body from its…

Q: 1.2 Reducing extracellular [Na+] in the solution surrounding a squid giant axon would be expected to…

A: Squid giant axon - It is very large, it's function is, in squids it control part of water jet…

Q: Which of the following would increase the speed of a nerve impulse along an axon?A. Decreasing the…

A: The Speed of conduction of nerve impulses is increase by the presence of a myelin sheath . The…

Q: Like many neurotransmitters, serotonin (5-HT) can have different postsynaptic effects on different…

A: 1 ) Answer is option A.  There are several types of postsynaptic receptors for serotonin.

Q: Synaptic vesicles are most commonly located: Select one: a. within presynaptic axon terminals b.…

A: The control and coordination of the body in humans occur by two systems- the nervous system and the…

Q: There are several neurons forming synapses on a single post-synaptic neuron that has a resting…

A: Resting membrane potential is the potential difference across the membrane of a neuron, i.e., the…

Q: An axon has a membrane capacitance of 4 x 10 F and the membrane resistance of 2 KQ. If the speed of…

A: Introduction The part of a nerve cell (neuron) that transports nerve impulses away from the cell…

Q: I. These forms the specialized junctions called synapse. A. Cell body B. Glial cells C. Synaptic…

A: Introduction :- The point of transmission of electric nerve impulses between two nerve cells…

Q: At maximal stimulation, much above threshold, how long will it be until an axon fires the next AP?…

A: The action potential is defined as the quick variation in the membrane potential that occurs when a…

Q: Excitatory neurons A and B both synapse with neuron C. Neuron A releasesa neurotransmitter, and…

A: The junction between two neurons is known as a synapse and when a neuron reaches its action…

Q: At a chemical synapse, an action potential triggers an influx of Ca2+ which . Select one: O A.…

A: When the action potential reaches the presynaptic neuron terminal, it activates the voltage-gated…

Q: Which of the following statements regarding polarized membranes is incorrect? a. There is a…

A: At rest, the ionic composition of the interior and outside of a neuronal membrane varies. As a…

Q: True or False a. When they are at rest, neurons are more positively charged inside than outside the…

A:

Q: Compare the signal conduction speed in myelinated fibers versus unmyelinated ones. Why aren’t all…

A: Ans: Myelination: In this process the fatty sheath which surrounds neuronal process as well as…

Q: The two primary factors that influence the speed of an action potential propagation are axon…

A: The nervous system is an exceptionally complex piece of a creature that arranges its activities and…

Q: Ordinarily, a neuron’s trigger zone is activated before any other part ofan axon, so a wave of…

A: Nerve cells are electrically excitable cells that method and transmits information by electrical and…

Q: Which of the following statements is TRUE of the action potential?

A: Sodium –potassium pump is one of the major biochemical pathways leading to critical physiological…

Q: You are a neuroscientist and have been provided a sample of a new snake venom. You test its effect…

A: Introduction A neurotransmitter is a chemical messenger that transports, enhances, and balances…

Q: 1) What is responsible for returning the cell to its normal resting membrane potential following the…

A: Neurons are the basic unit of the nervous system that carry electrical stimuli throughout the body.…

Q: In temporal summation. Select one: O A. IPSPS, but not EPSPS, are combined. O B. The postsynaptic…

A: Temporal Summation : It is a phenomenon in which repeated and equal intensity noxious stimuli at a…

Q: The absolute refractory period of an action potential A. only ensures one-way travel down an axon.…

A: In neurology, action potential is defined as the rapid rise and gradual of membrane potential across…

Q: When summation of multiple graded synaptic potentials occurs which of the following would…

A: Post synaptic potentials or PSPs are called excitatory (or EPSPs) in case they increase the…

Q: Action potentials (APs) are all-or-nothing, nondecremental, electrical potentials that allow an…

A: j) Action potentials (APs) are all-or-nothing, nondecremental, electrical potentials that allow an…

Q: Organophosphate pesticides inhibit the action of acetylcholinesterase. What effect does this have in…

A: Organophosphate pesticides (OP) are broad-spectrum chemical compounds comprised of a phosphate…

Q: You are recording from two neurons in order to characterize the synapse that connects them. When the…

A: Introduction  Neuron/Nerve: A neuron is a single nerve cell which consists of central cell body,…

Q: View an electron micrograph of a cross-section of a myelinated nerve fiber image below. The axon…

A: The structural and functional unit of the nervous system is called a neuron. A neuron is composed of…

Q: During a relative refractory period of an action potential   A. Another action potential can be…

A: Action potential (AP) is the mode through which a neuron transports electrical signals. It is…

Q: 1. Action potentials are generated in a region called the _______ which includes the axon hillock…

A: Action potentials are generated in a region called the initial segment  which includes the axon…

Q: ) Neurons cannot respond during the absolute refractory period because: a) the concentration…

A: The absolute refractory period starts immediately after the initiation of the action potential and…

Q: Subject: Neurophysiology  Batrachotoxin OPENS Na+ channels.  If this is added to a bath solution in…

A: The membrane potential is a minor differential in electrical charge that exists across the cell…

Q: The equilibrium potential for K* in neurons is ordinarily nearest- A. the equilibrium potential for…

A: The correct option is B - resting potential

Q: Refer to the graph showing the course of an action potential. Which of the numbered points along the…

A: As the membrane potential is increased, sodium ion channels open, allowing the entry of sodium ions…

Q: . Suppose a particular neurotransmitter causes an IPSP inpostsynaptic cell X and an EPSP in…

A: Neurons are cells within the nervous system. They transmit information to other nerve cells, muscle,…

Q: If your index finger had to be amputated as a result of a freak what would happen to your S1…

A: Introduction S1 somatotopic maps refers to spatial patterns within the functional organization of…

Q: Use Figure Q1(b) of an action potential to answer questions (1) until (iv) below. Choose the correct…

A: Nerve impulse refers to an electrical or chemical signal that is transmitted along  a fibre. The…

Q: If a postsynaptic cell has synapses from five different cells, and three cause EPSPs and two of them…

A: Postsynaptic potentials are membrane potential changes of a chemical synapse’s postsynaptic…

Q: During the refractory period a) if a neuron reaches threshold the action potential goes to…

A: Neurons are the cells of the nervous system.

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: Which of the following statements about hyperpolarization are correct? Pick all that apply to what…

A: Hyperpolarisation is an event that occurs in neurons during the action potential.

Q: GABA is an example of an inhibitory neurotransmitter. Drugs that increase the level of GABA are used…

A: Neurotransmitters are substances in our body that carry signals from one nerve cell to another.…

Q: Sequence the following list of events of a neuronal action potential by placing 1 next to the first…

A: Action potentials are those electrical impulses that send certain specific signals around your body…

Q: The axon hillock of a neuron reaches the threshold of excitation and the membrane potential becomes…

A: Potential for action is a fast reversal of membrane potential in which the membrane potential shifts…

Q: An on center bipolar cell ________  when light is on the center of its receptive feild, because it…

A: Humans have a pair of eyes located in sockets of the skull known as orbits. The human eyeball is…

Q: Which bulb shaped structures found at the end of neurons form connections with the dendrites and…

A: Introduction :- A neuron is a nerve cell that serves as the foundation of the nervous system. In…

Q: What happens when a resting neuron’s membranedepolarizes?(A) There is a net diffusion of Na+out of…

A: The membrane potential is the net voltage on the membrane of a neuron. The difference in the charge…

Dissection

Dissection is the process of cutting up the tissue of a dead or live animal or plant, to do anatomical studies and surgical treatments. The purpose of dissection is to learn more about the overall structure of organs and organ systems and thereby understand the physiology of the organism.