Biology Biology Practice Problems Solutions Library

Neurons and Action Potentials Solutions Library

Access 32 Neurons and Action Potentials video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Neurons and Action Potentials learn videos.

Browse Solutions

32 solutions

Neurons and Action Potentials

Q. The Na+/K+ ATPase  (Na+/K+ pump) maintains the concentration gradients for sodium and potassium ions by moving two sodium ions out of the cell and ...

Solved • Sep 13, 2018

Neurons and Action Potentials

Q. The neurotransmitter acetylcholine:A. enters muscle cells through acetylcholine receptorB. released from nerve cells through the acetylcholine rece...

Solved • Aug 2, 2018

Neurons and Action Potentials

Q. The absolute refractory period is the timeA. between injury to an axon and recovery of function.B. it takes a neurotransmitter to diffuse across a ...

Solved • Jul 19, 2018

Neurons and Action Potentials

Q. The plasma membrane of a neuron is more permeable to potassium ions than to sodium ions because the membrane has:A. more ligand-gated potassium ion...

Solved • Jul 19, 2018

Neurons and Action Potentials

Q. The effects of acetylcholine can be either excitatory or inhibitory. The effect depends on A. The type of calcium channels in the presynaptic neuro...

Solved • Jul 18, 2018

Neurons and Action Potentials

Q. What does it mean that a part of the membrane is refractory? Select all that apply.A. It is insensitive to another depolarizing stimulus.B. It mean...

Solved • Jul 17, 2018

Neurons and Action Potentials

Q. What factors contribute to the -70mV resting membrane potential? (select all that apply)A. Na+ leak channels allow Na+ to leak in.B. Cl- enters the...

Solved • Jul 17, 2018

Neurons and Action Potentials

Q. Astrocytes often serve as support cells that provide fuel for the neurons. Describe briefly the processes carried out by astrocytes to feed the neu...

Solved • Jul 13, 2018

Neurons and Action Potentials

Q. List and explain all things that contribute the resting membrane potential of excitable cells (e.g., neurons, muscle).

Solved • Jul 12, 2018

Neurons and Action Potentials

Q. Describe the sequence of events at a typical fast chemical sysnapse.

Solved • Jul 1, 2018

Neurons and Action Potentials

Q. What are the three different possible electrical currents in the post synaptic membrane?

Solved • Jul 1, 2018

Neurons and Action Potentials

Q. Describe the properties of a voltage gated potassium channel. What is its' role in an ? Is there any effect of the inactivating particle?

Solved • Jun 30, 2018

Neurons and Action Potentials

Q. If Ca+2 concentrations inside and outside a cell are 10-7 and 10-3 M, respectively, then ECa+2 will be: a. +61.5 mVb. +246 mVc. +123mVd. -61.5mV

Solved • Jun 28, 2018

Neurons and Action Potentials

Q. Explain the sequence of events that allows a pre-synaptic cell to communicate with a post-synaptic cell.

Solved • Jun 28, 2018

Neurons and Action Potentials

Q. Why does the width of the action potential affect synaptic release?

Solved • Jun 26, 2018

Neurons and Action Potentials

Q. Which of the following describes a B fiber?a. large diameter, lightly myelinatedb. medium diameter, lightly myelinatedc. small diameter, lightly my...

Solved • Jun 25, 2018

Neurons and Action Potentials

Q. Why is a neuron unable to fire an action potential during the absolute refractory period?

Solved • Jun 14, 2018

Neurons and Action Potentials

Q. Why are neurons long and branched? Why are neutrophils so small?

Solved • Jun 13, 2018

Neurons and Action Potentials

Q. What is the most abundant intracellular cation?a. Na+b. K+c. HPO42-d. Cl-

Solved • Jun 11, 2018

Neurons and Action Potentials

Q. If Ca+2 concentrations inside and outside a cell are 10-7 M and 10-3 M, respectively, then ECa+2 will be:a. +61.5 mVb. +246 mVc. +123 mVd. -61.5mV

Solved • Jun 11, 2018

Neurons and Action Potentials

Q. An enzyme known as acetylcholinesterase is present in the synaptic cleft. What is its role?a. to pump Ca2+ back out of the axon terminalb. to facil...

Solved • Jun 6, 2018

Neurons and Action Potentials

Q. The rate with which an action potential travels along an axon _______.a. is called the conduction velocityb. is measured in meters/secc. is measure...

Solved • Jun 5, 2018

Neurons and Action Potentials

Q. What causes a neuron to "fire?" How does this happen? In your own words, do your best to explain this process.

Solved • May 24, 2018

Neurons and Action Potentials

Q. How does signal conduction in myelinated axons differ from signal conduction in unmyelinated axons?

Solved • May 15, 2018

Neurons and Action Potentials

Q. Where are neurotransmitter receptors located? a. the nuclear membrane b. the nodes of Ranvier c. the postsynaptic membrane d. synaptic vesicle ...

Solved • Nov 22, 2017

Neurons and Action Potentials

Q. A common feature of action potentials is that theya. cause the membrane to hyperpolarize and then depolarize.b. can undergo temporal and spatial su...

Solved • Nov 22, 2017

Neurons and Action Potentials

Q. Neurotransmitters can affect postsynaptic cells by ________. I) initiating signal transduction pathways in the cells II) causing molecular changes...

Solved • Nov 22, 2017

Neurons and Action Potentials

Q. An example of ligand-gated ion channels is ________. a. the spreading of action potentials in the heart b. acetylcholine receptors at the neuromu...

Solved • Nov 22, 2017

Neurons and Action Potentials

Q. Neurotransmitters are released from axon terminals via ________. a. osmosis b. active transport c. diffusion d. exocytosis

Solved • Nov 22, 2017

Neurons and Action Potentials

Q. Why do Na+ ions enter the cell when voltage-gated Na + channels are opened in neurons? a. because the Na+ concentration is much lower outside the ...

Solved • Nov 22, 2017

Neurons and Action Potentials

Q. The concentrations of ions are very different inside and outside a nerve cell due to ________. a. osmosis b. diffusion c. sodium-potassium pumps...

Solved • Nov 22, 2017

Neurons and Action Potentials

Q. The point of connection between two communicating neurons is called the ________.a. axon hillockb. dendritec. synapsed. cell body

Solved • Nov 22, 2017