1. Action potentials are generated in a region called the _______ which includes the axon hillock and the initial segment of the axon. 2.According to the all-or-nothing principle a.once the electrical impulse reaches a certain level of intensity (its threshold), it fires and moves all the way down the axon without losing any intensity. b.the amount of time a neuron must “rest” in between firing episodes is stable. c.as a person ages, his or her neurological system slows down and the intensity of neural impulses decreases significantly. d.if all the neurons in a network are not integrated, the “message” carried by the neurons will be lost.

Q: 1. When a neuron is not generating an action potential, its membrane (the neurolemma) has a resting…

A: Hi ! Thanks for posting the question. Since we are entitled to answer fist question, we’ll answer…

Q: Most human axons have a myelin sheath that, a. prevents action potentials from moving backward b.…

A: The neuron is the specialised cell in our nervous system that is responsible for the generation and…

Q: 4. a) In the diagram below, decide which side represents the inside of the axon and which represents…

A: Neurons are the key units of the nervous system in an organism. It is responsible for conducting…

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: Which of the following statements best explains why a neuron's membrane potential rapidly drops…

A: The neurons are the impulse conducting cells in the nervous system. The membrane potential of…

Q: 6. You are interested in how the density of NMDA receptors in the postsynaptic membrane prior to…

A: NMDA is the N-Methyl-D-aspartic acid or it is also called N-Methyl-D-aspartate. It is an amino acid…

Q: The _________________ of action potentials states that once an action potential begins, it will…

A: Action potential is a phenomena in which nerve impulse conduction takes place by the process of…

Q: increases the probability of producing an action potential, where a ________ decreases the…

A: Depolarization increases the probability of producing an action potential, where a hyperpolarization…

Q: . synaptic vesicles are synthesized in the nerve cell body - TRUE OR FALSE 2.in an electrical…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: system is affected? Select one: Oa. Type of Neuron Division of the Nervous System Interneuron PNS b.…

A: The nervous system is the portion of an animal's body that controls and transmits signals between…

Q: Action potentials propagate directionally, down the ____ from the _____ to the____of the neuron.…

A: a. length of a neuron b. axon hillock (base of the axon)  c. tip of the axon

Q: Which of the following is NOT an example of communication that happens from one neuron to another…

A: Answer: - Option a - Endocrine signalling (ex. hormones secreted into the bloodstream travel and…

Q: 8. Explain what is happening within the neuron at each step each step of the action potential…

A: Neuron is one of vital component of muscular system which actually helps in transmission of signal…

Q: 4. What are the problems with a repaired PNS axon?

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Define an excitatory and inhibitory postsynaptic potential. Describe their significance and what…

A: The postsynaptic potential (PSP) is defined as a change in the electric potential of the nerve cell…

Q: The neuroglia in the CNS comprise all these cells, EXCEPT Schwan cells Microglia Astrocytes…

A: Note: Question 2 is graded and so can't be answered!!  Introduction Glial cells, also known as…

Q: Select one: a. increased amount of ATP b. movement of chlorine down its concentration gradient c.…

A: Introduction  Information is transmitted via neurons. They communicate between various brain regions…

Q: Neurotransmitters are released from neurons due to the opening of ____________. Select one: a.…

A: Neuron is the sub unit of nervous system. It helps in coordinating the different body parts via…

Q: Summing incoming neural signals is part of (a) reception (b) transmission (c) integration (d) action…

A: Ans: Neural signal: These are mainly responsible for sending the electrical signals in response to…

Q: An action potential begins when______ . a. a neuron reaches threshold potential b. voltage-gated…

A: Answer is a.) a neuron reaches threshold potential.

Q: At a given synapse, the _____ neuron has neurotransmitter receptors.

A: Neurotransmitter receptors:                       The receptors present in the plasma membrane of…

Q: 18. How is a nerve impulse transmitted across a synapse from a presynaptic to a postsynaptic cell?…

A: The correct answer to the question is: c. via a neurotransmitter

Q: .What are the 3 types of chemical channels and where on the neuron would they be found? b.What…

A: Nerve cells or neurons are the basic structural and functional unit of the nervous system. They are…

Q: 6. 7. Identify the following structures on an image of a synapse: Postsynaptic neuron Presynaptic…

A: Transmission of nerve impulse from one neuron to the next neuron occurs at the synapses. There are…

Q: During an action potential _______    A. Na+ flows out of cell and causes depolarization  B. K+…

A: A characteristic pattern of rapid rise and subsequent fall in voltage or membrane potential across a…

Q: The strength of a stimulus is communicated to the Axon terminal button by_ of action potentials a.…

A: DISCLAIMER: Since you have asked multiple questions, we have solved the first question for you. If…

Q: Most human axons have a myelin sheath that a. prevents action potentials from moving backward b.…

A: We know that The complex body of human being functions in a systemic and coordinated way and this…

Q: 1. Why does the action potential not go back to where it came from? (Multiple answers possibly) the…

A: An EMG is a type of electrical recording device. Muscles are constantly sending electrical impulses.…

Q: Suppose you depolarize an axon midway between its initial segment and its terminus. А. In which…

A: Depolarisation of axon:  This occurs when the Sodium ions rapidly rush inside the neuron via…

Q: 1.) In an experiment you artificially cut in half (~50% reduction) the number of voltage gated…

A: Axon hillock is the terminal region in the soma which is the site of summation of synaptic inputs.…

Q: 28. The insulating structures of the neuron are collectively called the the cells which form this…

A: Answer: The insulating structure of the neuron are collectively called the - B. Myelin sheath. The…

Q: Question 2: Action potentials 1. Aneuron is isolated and placed in a bath of normal ECF solution.…

A: Introduction An action potential is a characteristic pattern of sudden rise and subsequent decline…

Q: 75. Nodes of Ranvier are ________ -Knots on the dendrites of neurons . -nodes where two cells…

A: 75. Neurons are the fundamental unit of the function and structure of the nervous system. They are…

Q: Changes in ion permeability or ion concentration can alter the resting membrane potential of a…

A: A. Increase in [K+]out: H (Hyperpolarization)Higher external potassium concentration will increase…

Q: 23. During depolarization a. potassium ions (K*) flow into the neuron. potassium ions (K*) flow out…

A: Note: Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: What is action potential? Please describe the ionic mechanisms of depolarization and repolarization…

A: The resting membrane potential, or simply the resting potential, is a voltage across the membrane of…

Q: 1. The graph above represent time in milliseconds.  At what time (in milliseconds) is the inside of…

A: The nervous system is the most important system in an organism. It helps to see ,taste, smell etc.…

Q: Summationa. is caused by combining two or more graded potentials.b. occurs at the trigger zone of…

A: The action potential is the temporary shifts in the potential of the neuronal membrane which results…

Q: Cell A is a glutamatergic neuron with a single synapse onto Cell B. Which of the following events…

A: Introduction A Temporary Change In The Electric Polarisation Of A Nerve Cell's Membrane Is Referred…

Q: An excitatory postsynaptic potential   a. is only one of several types of graded potential.   b.…

A: Preynaptic cell is the cell or a neuron from where the signal is passed on to the synapse to the…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.