OProtein channels can embed in the cell membrane because they have: a. A hydrophobic central region b. Several charged amino acids in the middle C. An opening in the middle d. Charisma 4)Protein in they

Q: How much time would it take ATP to diffuse the following distances? (Use the equation for mean…

A: The diffusion coefficient D for ATP (at 25 o C) =3.54 cm2/s. The mean square displacement equation…

Q: The negatively charged intracellular environment and resulting resting membrane potential of neurons…

A: When a cell is not stimulated, its resting membrane potential is defined as the electrical potential…

Q: The cells lining the small intestine rapidly move large quantities of glucose from the glucose-rich…

A: The energy of the cell, usually in the form of adenosine triphosphate, is required for active…

Q: Proteoglycans in the extracellular matrix of animal tissues ... a) are proteins that are heavily…

A:

Q: Cell membranes can maintain a difference in electrical charge between the inte- rior of the cell and…

A: Cell membrane is negatively charged from inside in comparison to outside. But at the time of impulse…

Q: Membrane carriers resemble enzymes except for the fact that carriersa. are not proteins.b. do not…

A: A membrane carrier is a molecule that is involved in the movement of ions, small molecules, and…

Q: Which of the following proteins would not be produced in the Rough Endoplasmic Reticulum? A)…

A: The rough endoplasmic reticulum is composed of membranes attached with ribosomes. This gives it a…

Q: What do contractile vacuoles do? A. pump water out B. overfill the cell with water C. make acidic…

A: This question is about contractile vacuoles.

Q: Which of the following statements is generally true regarding the chemical messengers for…

A: The cell is covered by the cell membrane which is made up of lipids and proteins. Molecules which…

Q: Facilitated transport differs from diffusion in that facilitated diffusiona. involves the passive…

A: Answer is b.)  involves active use of a carrier protein.

Q: G protein–linked receptors (a) inactivate G proteins (b) activate first messengers (c) consist of 18…

A: The cell is the basic structural and functional unit of life of all living organisms capable of…

Q: You apply a drug to neurons that blocks the KCC transporter. As a result, you have a rise in…

A: These are integral membrane proteins,  typically formed as assemblies of several individual…

Q: choose one:   a. Steroids are hormones processed by their target cells at the plasma membrane b.…

A: The chemical messengers that are synthesized in one tissue and passed to one or other tissues…

Q: ABC transporters are:   a. An example of active transport with activity in multi-drug resistance.…

A: ABC transporters are a transport system that is one of the largest and possibly one of the oldest…

Q: Which of these statements about carrier-mediated facilitated diffusion is true? a. It uses cellular…

A: There is a need for the movement of substances in and out of the cell for cellular exchange. It is…

Q: Which of the following is incorrect regarding facilitated diffusion?a. It is a passive process.b. It…

A: Molecules can move via biological membranes via 2 main methods : active and passive transport.…

Q: Blood-borne bacteria BURST with the activity of C3a protein C3b protein C5a protein O C9 protein O…

A:

Q: Hyperkalemia is associated with the inability of the kidneys to properly filter potassium out of the…

A: Kidneys are  bean shaped organs , situated just below the rib cage  on each side of the spine. They…

Q: All are protiens of cell membrane that are involved in flow of nerve impulse except 1-channel…

A: The plasma membrane or cell membrane is formed of proteins, carbohydrates and lipids. The lipid…

Q: The image illustrates passive and active transport across the cell membrane.  (Use the diagram to…

A: Water, gas and nutrient are essential component of cell for both plants and animals. Water water…

Q: Which of the following statements about "leak channels" in the plasma mem- brane is correct? A.…

A: Introduction - The sodium ions concentration inside the cell is low, while the sodium ions…

Q: the extracellular matrix is not composed of  a)Actin b)Fibronectin c)collagen d)proctoglyean

A: Extracellular matrix is a network of extracellular macromolecules and minerals such as collagen,…

Q: Active transport must function continuously because. a. plasma membranes wear out b. not all…

A: While passive transport keeps moving the solutes along the concentration gradient to maintain…

Q: When you jump in the bath, water does not run around all your cells and directly into your body.…

A: These are water channels,  are channel proteins from a larger family of major intrinsic proteins…

Q: 1. When all the protein carriers are used up, the carriers are said to be A. Adapted B. Unsaturated…

A: Hi! As you have posted multiple questions and have not mentioned which one is to be answered, we are…

Q: What would protein channels be in a city ?

A: A channel protein is a special arrangement of amino acids which embeds in the cell membrane,…

Q: Which of these is NOT a second messenger molecule? a. inositol triphosphate b. cyclic guanine…

A: Ans : K+ ions are not second messenger. option d is the right answer.

Q: Comparison of the ion concentrations of cell cytoplasm with the extracellular fluid would show that'…

A: The differences in the ion concentration inside and outside of the cell give rise to membrane…

Q: Why are ion channels necessary to transport ions into or out of a cell? a. Ions are too large to…

A: The answer to the above question is option (b) (b) Ions are charged particles and cannot diffuse…

Q: Glucose enters muscle cells by the process of facilitated diffusion. Which curve below, A or B,…

A: Glucose; a monosaccharide carbohydrate composed of Carbon, hydrogen, and oxygen in the ratio of…

Q: ________ is the process of a cell taking in needed molecules from the extracellular fluid.   a.…

A: Phagocytosis (cell eating) is a process by which cells ingest large particles, including other…

Q: A hypertonic glucose solution A. Causes cell hemolysis…

A: The solution is a fluid combination of two different components in which the minor segment is solute…

Q: When testing tonicity of red blood cells, if the solution became transparent after adding blood…

A: Tonicity It is a measurement of effective osmotic pressure when the two solutions are separated by a…

Q: part 1 Reaching osmotic balance across a semipermeable membrane for non-charged molecules depends…

A: Osmotic balance is also called osmoregulation. It is the process of maintaining salt and water…

Q: When a human white blood cell “consumes” a red blood cell (erythrocyte), this process is called:…

A: Endocytosis is a process of taking particles or substance into the cell by pinching the membranes of…

Q: The sodium–potassium pumpa. helps establish an electrochemical gradient across the membrane.b.…

A: The electrochemical gradient can be defined as the gradient of electrochemical potential, usually…

Q: Conotoxin is produced by marine cone snails. Among its effects is to block voltage-gated Ca2+…

A: A conotoxin is defined as one of a group or set of neurotoxic peptides isolated from the venom of a…

Q: Which of the following statements about the sodium-potassium pump is correct?   A) Both sodium and…

A: Sodium-potassium pump is also known as Na+/K+ pump. It is a protein pump found in the cell membrane…

Q: 3 ANE .MOO城が

A: The plasma membrane, also called the cell membrane, is the membrane found in all cells that…

Q: What is the name of the mechanism that ensures that there is a higher concen- tration of sodium ions…

A: The ions sodium, potassium, and chloride have the largest concentrations and so play the most…

Q: In some circumstances, as during a nerve impulse, sodium ions must enter the cell. How are they able…

A: A plasma membrane is made up of a lipid bilayer which helps in the separation of cell interior from…

Q: Tetrodotoxin is a neurotoxin found in puffer fish. This large molecule blocks the sodium channels in…

A: Introduction :- Neurotoxins are manmade or naturally occurring compounds that harm, destroy, or…

Q: Which of the following distinguishes osmosis from simple diffusion?  a) a concentration gradient…

A: A cell membrane is made of various biological molecules such as phospholipids, cholesterol, and…

Q: Which answer is correct (a or b) for the question about why your hands and feet get wrinkled after…

A: In a water molecule, two hydrogen atoms form single polar covalent bonds with an oxygen…

Q: Facilitated diffusion moves objects from... A. a LOWER concentration area to a HIGHER concentration…

A: Water water soluble substances and gaseous components are transported across the cells by various…

Q: Plasma membranes are selectively permeable. This means: A. cholesterol cannot enter B. anything can…

A: Plasma membrane is also referred to as cell membrane. It is a thin membrane that surround each and…

Q: GABA receptors play an essential role in neurotransmission in the central nervous system. In…

A: Gamma-aminobutyric acid (GABA) is a neurotransmitter amino acid used by the brain to decrease brain…

Learning and memory

Learning is defined as a relatively permanent and irreversible adaptive change in behavior. It always results from experience. The ability of an organism to store and recall the effects, sensations, and knowledge gained through learning and experience is called memory.