Electrochemical gradient - Samenvattingen, Aantekeningen en Examens

BIO 669 Quiz 2 Latest; (2024/2025) Questions and Answers 100% Correct.(33 Q & A) 1. When both Na+ and K+ are permeable at the same time (as in opening ion channels at the neuromuscular junction allowing both to cross), what will happen to the membrane potential? 1. Graded potentials are all of the following EXCEPT: 2. Movement of potassium down its electrochemical gradient will result in what effect on membrane potential? 3. The reticular formation is responsible for: 4. Damage to...

integral proteins - correct answer Penetrate the hydrophobic interior of the lipid bilayer. Commerce via facilitated or active. peripheral protein - correct answer A protein loosely bound to the surface of a membrane or to part of an integral protein and not embedded in the lipid bilayer. Carbohydrate group - correct answer Linked with protein or lipids and function as adhesion. Cholesterol - correct answer Steroid common in cell membranes, also in many hormones. Functions as suppor...

Bio 161 Exam 2- Penn State Questions and Answers Already Passed Question 1: What is the definition of current in the context of physiology? - a. movement of ions - b. flow of charged particles - c. chemical reaction - d. electrical discharge - Answer: b. flow of charged particles Explanation: Current refers to the flow of charged particles, such as ions, from one point to another, driven by an electrical potential or voltage. Question 2: What term is used to describe an el...

Reactions that add a phosphate to specific sites on proteins in an ATP dependent manner are important in cell signaling. The type of enzyme that catalyzes this reaction is: - ️️a protein kinase What secondary structure found in proteins is often used to enable it to cross a membrane? - ️️alpha helices An inhibitory acetylcholine receptor would - ️️be a K+ channel The nonpolar part of a phospholipids consists of - ️️fatty acid chains Which of the following is true concernin...

Afferent Division - ️️approaches CNS; carries sensory info; from PNS sensory receptors to CNS Neurons - ️️the basic functional units of the nervous system; cells that send and receive signals Peripheral Nervous System - ️️includes all neural tissue outside the CNS; delivers sensory info to the CNS and carry motor commands from the CNS to peripheral tissues and systems The Nervous System - ️️made of neurons and neuroglia cells; includes all neural tissue in the body Neuro...

The Light Harvesting Complex (LHC) molecules are arranged to facilitate correct answers Resonance energy transfer to the reaction center Which statement below best describes the glycoconjugate structure of bacterial cell walls? correct answers Peptidoglycans with multiple strands of hexosamine polysaccharide chains linked together. What is the energy source for sustaining the electrochemical proton gradient in chloroplasts; what is the biochemical function of this gradient? correct answer...

Which of the following transport mechanisms may be utilized to move glucose across cell membranes? - Secondary active transport and facilitated diffusion Which of the following statements about the Na-K pump is(are) true? - The location of the binding sites on the Na-K pump dictates the direction of solute movement. Examples of active transport may include __________. - the movement of Na+ ions out of cells and the movement of glucose molecules into intestinal epithelial cells Which of the...

protonema (protonemata) - ANSWER a mass of green, branched, one-cell-thick filaments produced by germinating moss spores protonephridium (protonephridia) - ANSWER an excretory system, such as the flame bulb system of flatworms, consisting of a network of tubules lacking internal openings proton-motive force - ANSWER the potential energy stored in the form of a proton electrochemical gradient, generated by the pumping of hydrogen ions (H+) across a biological membrane during chemiosmosis

Which of the following is true concerning passive transport and active transport: - passive transport transfers molecules down an electrochemical gradient while active transport transfers molecules against an electrochemical gradient In a polarized cell, a barrier is created by a specific type of intercellular junction that maintains the separation of membrane proteins and between the apical and the basal sides of the cell. This barrier is called a: - tight junction What secondary structur...

AP Biology Final Exam Review 2024 Questions and Answers emergent properties new properties that emerge with each step upward in the hierarchy of life, owing to the arrangement and interactions of parts as complexity increases negative feedback a mechanism of response in which a stimulus initiates reactions that reduce the stimulus positive feedback a physiological control mechanism in which a change in a variable triggers mechanisms that amplify the change inductive reasoning ...