What is the major determinant of the permeability of a membrane to a specific ion? Concentration of the ion outside the cell O Concentration of the ion inside the cell Number of open ion channels specific for that ion O Electrical charge of the ion

Q: Voltage-gated sodium channels are open and allowing sodium to flow when: O The membrane is at the…

A: When the membrane potential of a particular cell site rapidly increases and decreases, an action…

Q: Which of these molecules is most likely to interact with an intracellular receptor? О HO НО H₂N ОН…

A: The cellular receptors are involved in signal transduction processes.Cell surface or membrane…

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: A single type of ion may pass through several different typesof channels. Explain the term with an…

A: Pore forming transmembrane proteins associated with transport of specific ions in or out of the…

Q: How can the resistance (Rm) of a membrane be increased? Increase conductance by opening ion channels…

A: A membrane resistance (Rm) is a measurement of how challenging it is for ions to cross the membrane.…

Q: DHP-Ryanodine receptors are: O Mechanically-gated O Voltage-gated O Always open O Ligand-gated…

A: Receptors-these are proteins present on the surface of cells that bind to ligands to cause responses…

Q: key roles in establishing and maintaining the resting membrane potential

A: Simulation of sensory nerve endings creates an impulse. Due to the movement of ions across the nerve…

Q: What membrane process releases neurotransmitters into the synapse during an action potential O…

A: During an action potential, the vesicles containing neurotransmitters migrate toward the presynaptic…

Q: (II) OI O II O III (IV) On the figure ABOVE, which panel (I, II, III or IV) represents a ligand…

A: Picture a tiny gatekeeper regulating the passage of charged particles such as calcium, potassium,…

Q: Potassium flows the cell through leak channels, its gradient. into, down out of , up into , up out…

A: Generation of nerve impulse in nerve  fibre depends on distribution of sodium and potassium in and…

Q: Which ions are important in transmitting information along the axon of a neuron?     Ca2+ and Zn2+…

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

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: The abundant intercellular connections gab junction can be found in * O diaphragm O Heart muscle O…

A: Introduction: Cardiac muscle (also known as heart muscle or myocardial) is one of three types of…

Q: When protein membrane receptors are activated, what usually happens? The receptors open and close in…

A: Question - When protein membrane receptors are activated, what usually happens?  The receptors open…

Q: Which of the following is a characteristic feature of a ion channel protein in a plasma membrane?…

A: The cell membrane is a structure which protects the cell and acts as a barrier and transports the…

Q: Choose high or low When the ion binding sites pumps are open to the inside of the cell the pump has…

A: The sodium potassium pump transports three sodium ions out of the cell when it opens inside the…

Q: What determines the direction of ion movement through an ion channel? O The electrochemical gradient…

A: ION CHANNEL - ion channels are pore - forming membrane proteins that allow ions to pass through the…

Q: To what part of a receptor molecule does a chemicalsignal attach? Explain how a chemical signal can…

A: A receptor protein has receptor sites on the surface that touches the extracellular area. These…

Q: In contrast to transporters and carriers, channels: O Are selective for the specific solutes (e.g.,…

A: Cell is separated from the external enviroment with the help of cell membrane. This cell membrane is…

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: Cell swelling will most directly affect which type of channel protein? Group of answer choices…

A: Cell swelling is an change that occurs in acute cell injury and It may be a simply disappear as the…

Q: Enzyme linked receptors: Function directly as enzymes or they are linked to enzymes O Are surface…

A: Enzymes are the biocatalyst that are responsible for enhancing the activation energy. These are…

Q: According to the general permeability equation, the net flux of solute across a cellmembrane, J net…

A: To determine the units of the permeability coefficient PPP, we can analyze the equation given:…

Q: After a neuron fires an action potential, the lon concentration gradients are disrupted, What…

A: The neurons are the nerve impulse generating and transmitting cells in the nervous system. It is…

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…

Q: What would the membrane potential be if the cell membrane suddenly became 10X more permeable to just…

A: Membrane potential is defined as the difference in electric charge across a cell membrane, making…

Q: How would you define the term "membrane potential." The ability of a cell to perform its specialized…

A: The plasma membrane is the membrane that separates the cytoplasm or interior of the cell from the…

Q: Which of the following can be correctly applied to gap junctions? Select all that apply O Allows…

A: * Gap junctions are small channels that  connect two adjacent cells and  mediates exchange of small…

Q: How is the cell membrane like a battery?

A: Cell membrane forms the outer most part of animal cells. It also limits the entry and exit of…

Q: what would the membrane potential be if the membrane became 10X more permeable to both sodium and…

A: When the membrane becomes 10 times more permeable to sodium (Na⁺) and chloride (Cl⁻) ions:Sodium…

Q: Which statement about active ion transporters is true? O They move certain ions against the…

A: An essential part of cellular physiology, active ion transporters are responsible for maintaining…

Q: What is a common feature of the voltage sensitive Ca++, Na+ and K+ ion channels? A single…

A: The structure of Na+, K+, and Ca2+ channels is made up of four transmembrane domains arranged around…

Q: Which image represents depolarizing graded potential?

A: The depolarizing graded potential is most commonly seen due to the influx of Na+ and Ca+ ions into…

Q: Positively charged ions are called and migrate toward the in an electrical field. are negatively…

A: The term migration is defined as the movement of ions in the influence of an externally applied…

Q: Difference in K* concentration across the PM pressure potential Both Difference in K+ concentration…

A: Resting membrane potential is the normal potential of the membrane it is negative inside and…

Q: Our patient cannot remove potassium from their extracellular fluid. This is known as hyperkalemia.…

A: Hyperkalemia is a medical term given to a person having a potassium level in his or her blood that's…

Q: Which of the following statements about ion channels are true? all ion channels are selective for…

A: All ion channels are selective for only one species of ion:  False. While ion channels are…

Q: Ions like K+ cannot diffuse directly across the membrane. They need open ion channels to cross the…

A: Ion channels are a class of transmembrane proteins that allow a high rate of ion flow powered by the…

Q: Which of the following statements is false? ○ Voltage, stretch, and temperature are all factors that…

A: Here's a more detailed explanation:Voltage, stretch, and temperature as factors regulating ion…

Q: Fill in the diagram, your illustration should demonstrate for each phase of the AP: 1. The relative…

A: Action potential (AP) occurs when membrane potential on a specific location of a cell rapidly rises…

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.