Gradients - Study guides, Class notes & Summaries

Why Does the Brain Need Blood? Consumes 15-20% of the body’s total energy needs, (and receives 15% of Cardiac Output), despite being only 2% of total body mass. Neurons require high ATP to:  Maintain Ion Gradients across Plasma Membrane  Regulate Neurotransmitter synthesis/re-uptake. Neurons have NO ANAEROBIC CAPACITY → Therefore the brain absolutely depends on Oxygenated Blood.  Hence, any deficit in blood supply is detrimental (≈30+sec lack of blood/O2 to brain → u...

Pathology exam 1 2024 questions & answers The most important role for the mitochondria in the cell: SUMMER '15 SPRING '15 SPRING '14 a. Production of ATP b. Protect labile proteins c. Remove defective cell parts d. Identify paternity - ANSWERSProduction of ATP Loss of ATP generating capacity by mitochondria results in a. Increased glycolysis b. Decreased protein synthesis c. Loss of ionic and osmotic gradients d. All of the above - ANSWERSAll of the above Reperf...

This is defined as the tendency for people to choose relationships with other people who have similar attributes: correct answers Homophily Homophily in social networks also implies that individuals with similar traits are more likely to form social ties with one another, which also often impacts their actions. What is this an example of: Individuals that share similar health risks such as high BP are more likely to form stronger social ties with one another, or put another way are less...

ABCP Practice Test Questions With Complete Solutions Which of the following is not true regarding peak aortic blood flow acceleration? a) it is significant primarily in patients with aortic stenosis b) it is a sensitive indicator of changing contractility state and secondary to hypoxia c) it is highly sensitive to inotropic changes d) it is minimally affected by preload changes e) 2 of the above - ANSWER it is significant primarily in patients with aortic stenosis In doppler a...

IB Biology: Chapter 1 Latest 2024 Graded A+ cell theory - all living things are composed of cells - the cell is the smallest unit of life - cells only arise from pre-existing cells challenges to the cell theory - *striated muscle* challenges the idea that a cell has one nucleus - *giant algae* challenges the idea that cells must be simple in structure & small in size - *aseptate fungal hyphae* challenges the idea that a cell is a single unit functions of life - metabolism - r...

AQA A LEVEL BIOLOGY Paper 1 2024 What is the function of the cell membrane? - Correct Answer To control what enters and leaves the cell, acts as a barrier between the cell and its environment. What structural feature of the cell membrane allows substances to enter/leave? - Correct Answer Partially permeable What is the fluid mosaic model? - Correct Answer States that a membrane is a fluid structure (because phospholipids are constantly moving) with a "mosaic" of various proteins embedde...

sodium potassium pump - ️️enzyme that transports 3 sodium to the outside, and it transports 2 potassium to the inside using the hydrolysis of ATP - creates more sodium outside and more potassium inside and creates a concentration gradient Midline, ipsilateral and contrelateral - ️️line separating left and right of the entire nervous system - ipsilateral means the same side of something and contralateral means the opposite side of something Nissl stain showed (Nissl) - ️️Nissl u...

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...

AP Biology - The Chemistry of Life; Questions & Answers 100% Solved elements Correct answer-substances that cannot be broken down into simpler substances by chemical means CHNOPS Correct answer-an acronym representing the 6 key elements of life carbon Correct answer-key element of life; major component of ALL organic compounds, including all 4 types of macromolecules (sugars, fats, proteins, and nucleic acids); rarely found unbound to other elements hydrogen Correct answer-key eleme...

MR screening should be ~~> -verbal and interactive -performed by Level 2 MR Personnel MR screening should not be ~~> simplified Who defines terms for marking medical devices in MR environment? ~~> ASTM According to ASTM, MR Safe is applied to items that: ~~> Items that pose no known hazard in ANY MR environment Ex: wood, glass, plastic According to ASTM, MR Unsafe is applied to items that: ~~> Item that poses unacceptable risk in MR environment 2 | P a g e | © c...