For a neuron to fire an action potential, its membranemust reach ________.a. hyperpolarizationb. the threshold of excitationc. the refractory periodd. inhibitory postsynaptic potential
Q: 20. are found primarily in the white matter A. myelinated axons B. neuron cell bodies C.…
A: The central nervous system includes the brain and the spinal cord. White matter is located in the…
Q: When a neuron is at rest,_____ . a. it is at threshold potential b. voltage-gated sodium channels…
A: Introduction Chloride is the most abundant anion in the extracellular fluid. Along with Chloride…
Q: What ion enters a neuron causing depolarization of thecell membrane?a. sodiumb. chloridec.…
A: A neuron is also called as nerve cell. It is an electrically excitable cell that communicated with…
Q: Which of the following would you predict would happen if you limited the amount of ATP to a neuron…
A: We have Na+/K+ ATPase channel that uses ATP to translocate 3 Na+ outside and 2 K+ outside which…
Q: The following figure is showing; Node Node Myelin sheath Node of Ranvier (a) Na+ ONa* Depolarization…
A: Axons are slender fibres that stretch from a neuron, or nerve cell, and are accountable for…
Q: A common feature of action potentials is that they(A) cause the membrane to hyperpolarize and then…
A: Plasma membrane always try to maintain potential difference between the sides of the extracellular…
Q: refers to the ability of neurons to produce action potentials that travel from axon hillock up…
A: Hi, Thanks For Your Question. Answer : Correct Option Is Excitability. Excitability Is Ability Of A…
Q: f) Parts of a Neuron A C E D F Axon (initial B segment) G I Output signal Synaptic cleft J H…
A: Neurons are the essential components of the central nervous system, the cells involved in receiving…
Q: A(n) ________ neuron has one axon and one dendrite extending directly from the cell body. a.…
A: Neurons are the basic structural and functional unit of the nervous system that consists of cell…
Q: Suppose axon A enters a ganglion (cluster of neurons) and axon B leaves on the other side. Shortly…
A: A ganglion is a group of neuron cell bodies in the peripheral nervous system of the Human Nervous…
Q: Most sensory neurons are: Select one: a. Multipolar and unipo neurons b. Unipolar neurons c.…
A: Neurons display great diversity in size and shape. Structurally, neurons are classified according to…
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: Which statement(s) regarding ions is true when a neuron is at rest? Positively charged cations are…
A: Neurons are also known by the name nerve cells. These cells are referred to as the fundamental units…
Q: When the neuron’s membrane is at rest, where are the sodium ions and potassium ions most…
A: Answer is b.) Sodium is mostly inside and potassium is mainly outside.
Q: Can you identify the structures of a neuron in Figure 14Aa, b?
A: Neurons are the basic functional unit of the nervous system. These are designed to transfer signals…
Q: Which of the following best describes the electrical state of a neuron at rest? a. The inside of a…
A: In a neuron, the information which is conducted occurs through electrical signals. When a neuron is…
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: Transmission of the nerve impulse across a synapse isaccomplished bya. the release of Na+ at the…
A: Introduction Neuron/Nerve: A neuron is a single nerve cell which consists of central cell body,…
Q: The myelin sheath is produced around axons in the PNS by (a) ganglia (b) neuron cell bodies (c)…
A: MYELIN SHEATH It is an insulating layer that forms around nerves, including those in the brain and…
Q: A neuron receives a series of stimuli that increases the membrane permeability of Na ', but not…
A: The nervous system is one of the vital systems of a body. It is a system of nerves which carry…
Q: Within a neuron an impulse travels: a. in all directions O b from cell body to axon from axon to…
A: A nerve impulse is the action potential that travels from cell body to axon.
Q: Regeneration of a severed axon has a better chance forsuccess in the PNS than in the CNS. Why is…
A: The nervous system involved in the transmission of impulses from all parts of the body to the brain…
Q: The integrative functions of the nervous system are performed mainly bya. afferent neurons.b.…
A: The neuron’s functional classification is based on the direction the action potential travel to the…
Q: If the plasma membrane of an electrically excitable cellwere depolarized to threshold in the center…
A: An action potential is defined as a swift increase that is followed by a drop in the voltage or…
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: A/An _____ synapse is formed when a presynaptic neuron synapses with the cell body of a postsynaptic…
A: Chemical synapse
Q: Neurons come in which different type(s)? A. Sensory B. Motor C. Skeletal D. A and B
A: The specialized cells that are involved in conducting nerve impulses are termed as nerve cells or…
Q: are found primarily in the white matter A. myelinated axons B. neuron cell bodies C. unmyelinated…
A: White matter and grey matter are the structural components of brain and spinal cord. White matter is…
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: 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: function of a neuron is
A: The nervous system of human beings is composed of nerves and neurons.
Q: At a given synapse, the _____ neuron has neurotransmitter receptors.
A: Neurotransmitter receptors: The receptors present in the plasma membrane of…
Q: When a neuron is at rest, the inside of the cell A has a slight negative charge relative to the…
A: Neurons Neurons also known as nerve cells, is the main functional unit of brain. It is a specialised…
Q: What structure is highlighted? A. Schwann cell B. Cytoplasm of Schwann cell C. Myelin sheath D.…
A: Schwann cells refer to the chief neuroglia of the PNS (peripheral nervous system). Neuroglia or…
Q: Which part of a neuron contains the nucleus?a. dendriteb. somac. axond. synaptic end bulb
A: The nervous system can be divided into central nervous system (CNS) and the peripheral nervous…
Q: On what part of the neuron are NT receptors typically located? If the activated NT receptors cause…
A: The correct option is C (action potential).Neurotransmitter receptors are located on the surface of…
Q: At an electrical synapse, presynaptic and postsynaptic membranes interface through a. neurofibril…
A: The brain is the main part of the body that controls every action in our body. It is located in the…
Q: To which part or parts of a neuron does the all-or-none law apply? a. Axons b. Dendrites c. Both…
A: Neurons are the basic unit of the nervous system. They are involved in the generation and…
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: Using a stimulus intensity of 65 µA, produce an action potential in the simulated neuron on…
A: Introduction Action potential is a shift in electrical potential caused by an impulse passing across…
Q: - The velocity of action potential is high in: a- Myelinated-small diameter neuron b-…
A: Introduction:- Neurons, which are brain cells, transmit information and instructions throughout the…
Q: Heidi’s physician prescribed a medication that is known to block the reuptake of serotonin…
A: A neurotransmitter is a chemical messenger that transmits signals from one neuron to other or to the…
Q: The two-neuron chain allows increased communication and control of the effector organ. A. True B.…
A: Autonomic nervous system – the efferent division of PNS is the communication link by which the…
Q: During saltatory conduction, action potentials are generated: a. along the entire length of the…
A: A neuron is the functional unit of the nervous system. Neurons are excitable cells that transmit…
Q: If a biologist wished to cause a depolarization event in a neuron, what action would achieve this…
A: An action potential (AP) appears when the membrane potential of a particular cell location rapidly…
For a neuron to fire an action potential, its membrane
must reach ________.
a. hyperpolarization
b. the threshold of excitation
c. the refractory period
d. inhibitory postsynaptic potential
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- A change in the voltage across a neuron’s plasma membranethat makes the neuron less likely to fire an action potential isa. a change that makes the resting potential less negative.b. an excitatory postsynaptic potential.c. an inhibitory postsynaptic potential.d. a change that lowers the threshold.The difference in charges across the plasma membrane of anunstimulated neuron is calleda. an EPSP.b. the resting membrane potential.c. an IPSP.d. the graded potential.e. the action potential.Saltatory conduction is a term applied to the "jumping" movement of action potentials Multiple Choice a) along the postsynaptic membrane from dendrite to axon hillock. b) along myelinated axons. c) from one neuron to another. d) in two directions at the same time. e) across electrical synapses.
- Transmission of the nerve impulse across a synapse isaccomplished bya. the release of Na+ at the presynaptic membrane.b. the release of neurotransmitters at the postsynaptic membrane.c. the reception of neurotransmitters at the postsynapticmembrane.d. Both a and c are correct.Which one of these is an example of an excitatory postynaptic potential in a typical neuron? a) A voltage change from -70mV to -70.5mV b) A voltage change from +35mV to 0MV c) A voltage change from 0mV to +0.35mV d) A voltage change from -69.5mV to -70mVWhat happens when a resting neuron’s membranedepolarizes?(A) There is a net diffusion of Na+out of the cell.(B) The equilibrium potential for K+(EK) becomesmore positive.(C) The neuron’s membrane voltage becomesmore positive.(D) The cell’s inside is more negative than the outside
- Neurons typically receive information at structures called Question 1 options: A) Myelin B) Dendrites C) Neuroglia D) Axons E) Axon hillocksA(n) ________ neuron has one axon and one dendrite extending directly from the cell body. a. unipolar b. bipolar c. multipolar d. pseudounipolarWhen a neuron is at rest, the inside of the cell A has a slight negative charge relative to the outside B has no charge C has a slight positive charge relative to the outside D has a charge identical to the outside
- During the refractory period a) if a neuron reaches threshold the action potential goes to completion b) No stimulus of any strength will trigger a new action potential c) It is possible to trigger a new action potential but only with an unusually strong stimulus d) The signal grows weaker with distance e) The neuron fires at its maximum voltage if a stimulus depolarizes the neuron to thresholdDuring saltatory conduction, action potentials are generated: a. along the entire length of the unmyelinated axon. b. regardless if threshold is reached. c. when the entire axolemma is depolarized. d. only at nodes of Ranvier of myelinated axons.The integrative functions of the nervous system are performed mainly bya. afferent neurons.b. efferent neurons.c. neuroglia.d. sensory neurons.e. interneurons.