When a cell membrane potential shifts from -70mV to -90mV we say the membrane has:

Q: a cell with the following ion concentrations had a resting membrane potential of -40mV which of the…

A: Cell membrane is selectively permeable to some specific ions.

Q: Receptor for epinephrine consists of seven transmembrane helices. T/F

A: Epinephrine is secreted by adrenal medulla. It is also known as emergency hormone or hormones of…

Q: a) A certain mammalian species (37 °C body temperature) has nerve cells with a resting potential of…

A: An action potential is initiated once the membrane potential goes above the excitation threshold of…

Q: What is the free energy change for the transport of calcium ions (Ca++) across a membrane from a…

A: Ions are distributed on either side of the cell membrane. The transport of ions across the membrane…

Q: The resting membrane potential of a neuron typically is  70 mV. What does this mean?

A: The nervous system is involved in the coordination and controlling of various activities in the…

Q: Consider a solute having a permeability coefficient of 10-6 m s-1 for the plasma membrane of a…

A: Diffusion is the process of movement of solutes from an area of high concentration to a low…

Q: a) Explain in detail what is occurring at stage A in the graph. (Be specific in terms of what's…

A:

Q: If an ion has the same concentration on both sides of the membrane, then Eion will be: O Positive O…

A: The equilibrium potential for an ion is the electrical potential at which the electrical gradient…

Q: Every cell in the body has organelles called mitochondria that can generate a voltage difference…

A: I) The total energy it stored is U = 2.9× 10^-13J II) Number of molecules produced are 3×10^6

Q: The sodium-potassium pump generates the following concentration gradients across the plasma…

A: Membrane potential also called transmembrane potential or membrane voltage is difference in electric…

Q: The action potential is a voltage pulse at one location on a cell membrane. How does it get…

A: Neurons are the basic structural and functional unit of the nervous system. Neurons have three…

Q: Chloride ions (Cl-) are in higher concentration outside of the cell compared to the intracellular…

A: Ion channels across the membrane allow the movement of specific ions in the cell and outside. This…

Q: Use the energy of ATP to maintain these K+ and Na+ gradients across the plasma membrane 000…

A: The movement of molecules from a region of lower concentration to a region of higher concentration…

Q: serotonin [µM] 0.025 transport rate A [dpm/min] 300.0 transport rate B [dpm/min] 10 0.08 920.0 30.0…

A: Serotonin refers to a chemical that gets produced by the neurons. It plays an important role in…

Q: If the plasma membrane becomes more permeable to Cl-, would there be Clinflux or Cl- efflux at an…

A: The resting membrane potential, often known as the resting potential, is a voltage across the…

Q: A synaptic vesicle has a diameter of 40 nm. The concentration of a neurotransmitter inside this…

A: The nerve cells of the nervous system are called neurons, Inside these nerve cells there lies a…

Q: V=62 log 10 (C0/Ci ) for a positive ion at 37 degrees Celsius. What is theoretical ratio of solution…

A: Biological membranes are made up of phospholipids. The phospholipids' heads groups face the cell's…

Q: channel gating is the process of opening and closing ion channels in a cell membrane  true or…

A: Introduction :- Ion channels are specialized proteins that span the cell membrane and selectively…

Q: What happens across the membrane of an electricallyactive cell is a dynamic process that is hard to…

A: Neurons are responsible for the electromagnetic conduction of the signals in the form of stimulus.…

Q: when calculating the Resting membrance potential using the goldman equation it is usally out, out…

A: The Goldman equation is often used to determine the resting membrane potential of a cell.  It…

Q: The membrane of most cells, including neurons, contains passive, open, K' leak channels. Given the…

A: The cell membrane is the biological membrane that separates the interior of the cell from the…

Q: This question uses the same experimental setup as in Question 1 and the same modification of the…

A: The objective of the question is to understand the movement of sodium ions (Na+) when the membrane…

Q: The above repolarization of a neuron will result in which of the following ionic currents? a…

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

Q: Some cells with very negative resting membrane potentials, like -80 mV, express an the inward…

A: The cell membrane separates the interior and the exterior of the cell. It is also called the Plasma…

Q: if you inject current into the middle of an axon by using an intracellular electrode you will get…

A: A neuron transfers information out of the cell's body through an axon, resulting in an action…

Q: The resting membrane potential of a cell is polarized, meaning that it has a _____ charge on the…

A: The action potential generates when depolarization of the membrane occurs by a stimulus. The change…

Q: Explain why the inside of the membrane changes form a jet negative charge to a positive charge at…

A: Whenever a nerve impulse is communicates from a cell body, the sodium directs the cell membrane open…

Q: Which of the following intracellular potentials would have the greatest electrical attraction for…

A: Cell Membrane potential is a potential slope that forces ion particles to move in one side. positive…

Q: Many cells in the human body maintain an electric potential difference across their cellular…

A: Introduction :- All cells have a cell membrane, also known as a plasma membrane, which separates the…

Q: After an action potential has been initiated, there are two processes that prevent the membrane from…

A: The generation of action potential is very much important characteristics in nerve cells that is…

Q: + + + +, 212 LOGY - BIt | + + + Given the information provided in this question, if 212 is an anion…

A: The cell's interior is usually negative at resting membrane potential. This membrane potential is…

Q: An experimental cell line expresses K+ inward rectifier channels, Na+ leak channels, K+ channels…

A: The α-1 adrenergic receptor is a type of receptor that is responsible for mediating the effects of…

Q: What is the emf of a cell consisting of a Pb2+/Pb half-cell and a Pt/ H / H₂ half-cell if…

A: Step 1: Standard reduction potential of Pb2+/Pb = - 0.13 V. Standard reduction potential of Pt/H+/H2…

Q: Why do cells that are not electricallyactive contain voltage-gated ionchannels?

A: The nervous framework is the piece of a creature's body that organizes its conduct and communicates…

Q: What is the most important thing, i.e. what has the biggest impact of determining the resting…

A: The amount of special potassium in the interval is usually important for resting resource control…

Q: It is typically sufficient to rupture cells when the solute concentration is reduced from 0.15M to…

A: Osmotic pressure is the pressure that develops when two solutions of different concentrations are…

Q: What transport rates for each condition would you expect if the experiment was repeated  using 12µM…

A: Serotonin is a neurotransmitter and it gets transported via a transporter protein found in the…

Q: Initial Extracellular fluid Solute Plasma membrane Cytoplasm В

A: Ans : The panel D represents the situation in which the concentration gradient of solute is…

Q: Let's say you have neurons in a petrie dish bath in a solution in which the extracellular K+…

A: Membrane potential(Vm) is defined as the potential created due to the difference in the electric…

Q: The Paramecium, is large enough to allow the insertion of a microelectrode, thus permitting the…

A: The cell membrane is selectively permeable to ions such as K+, Na+, and Cl-. This selective…

Q: An experimental cell line expresses K+ inward rectifier channels, Na+ leak channels, K+ channels…

A: Because alpha-1 adrenergic receptors are found in both vascular smooth muscle and cardiac tissue,…

Q: Na+1 is a charged ion that cannot easily cross the membrane. Is there any way for this ion to get…

A: the flow of Na+1 ion across a membrane depends on stimulus. whenever a cell membrane gets activated…

Q: For a typical cell that is 100 times more permeable to K* than to any other ion, use the Goldman…

A: Introduction  The smallest unit in biology that can sustain life on its own and makes up all living…

Q: What is the correct rank the following molecules in regards to membrane permeability from MOST (1)…

A: Permeability is a fundamental property of the cell membrane which is essential for the maintenance…

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.