Leak channels - Study guides, Class notes & Summaries

NUR968: Membrane Potentials & Action Potentials; Cell Signaling & Second Messenger Systems Practice Questions and Answers What is the membrane potential? - Ans:-Defined as the electrical potential difference across a cell's plasma How are ions classified? (2) - Ans:-1. Cations (positively charged) 2. Anions (negatively charged) Although all positive & negative charges establish membrane potential, what are the 2 key players (ions)? - Ans:-1. Sodium 2. Potassium True or false: The n...

Endoscope Reprocessing Manual Chapters 1 – 15 Verified Solutions 1. True or False: Manual cleaning should start right after pre-cleaning. - Answer: False 2. What term describes reprocessing that occurs more than one hour after the endoscope has been utilized? - Answer: Delayed processing. 3. When manually cleaning endoscopes, when should the cleaning solution be changed? - Answer: For each individual endoscope. 4. True or False: Using detergents that generate excessive foam can hinde...

BIOL 235 Midterm 2 Exam Questions and Answers Latest Updated | Graded A+. What is a mechanical advantage using the example of a lever? - if the load is closer to the fulcrum and the effort is farther from the fulcrum only a small about of effort is needed to move the load Bones serve as levers and joints serve as ________ for the lever - fulcrum Agonist (Prime Movers) _________ muscles while antagonist ____________ muscles - contract, relax What are muscles that contract and stabilize the i...

ASE A5 Brakes Exam Questions Brake pedal reserve that gradually fades under light pressure indicates: a. A brake line restriction b. Spring tension on the brake pedal is weak c. Internal leaks d. The system is operating properly - c Which of the following statements is NOT true? a. Some imports use HSMO, a green colored oil, as brake fluid b. Silicone, or DOT 5 brake fluids, contain a purple dye c. Polyglycol brake fluids are amber to clear in color d. All DOT approv...

TECHGRADES Biol 252 Test 1 questions and answers 100% verified.   3 characteristics of Neurons - correct answer. 1) excitability- respond to stimuli (environmental changes) 2) conductivity- respond to stimuli by producing electrical signals 3) secretion- end of nerve fiber- neurons secretes a neurotransmitter and stimulates next cell Soma - correct answer. cell body axon hillock - correct answer. -beginning of axon -trigger zone -where neuro...

CNS brain and spinal cord PNS Cranial nerves and spinal nerves (nerves and sensory receptors) Somatic nervous system division of PNS Skeletal muscles (muscles attached to our bones). Diaphragm is somatic because it is skeletal but it is inside the body. Autonomic nervous system division of PNS Smooth (intestines, blood vessels) and cardiac (heart muscles) muscles, glands (cells or many cells that can synthesize and secrete molecules to the body) Sympathetic nervous system division of ANS Fig...

The following is a list of several levels of organization that make up the human body: 1. organelle 2. system 3. tissue 4. organism 5. cell 6. organ - Answer-1, 5, 3, 6, 2, 4 The dorsal body cavity contains: - Answer-The cranial and vertebral cavities. A cut through the body that passes parallel to the horizontal axis of the body and divides the body into superior and inferior sections is known as a: - Answer-Transverse section. Which sectional plane could divide the body into an anterior a...

The following is a list of several levels of organization that make up the human body: 1. organelle 2. system 3. tissue 4. organism 5. cell 6. organ correct answers 1, 5, 3, 6, 2, 4 The dorsal body cavity contains: correct answers The cranial and vertebral cavities. A cut through the body that passes parallel to the horizontal axis of the body and divides the body into superior and inferior sections is known as a: correct answers Transverse section. Which sectional plane could divide t...

A natural ligand (neurotransmitter) causes sodium leak channels to open, allowing more sodium to pass through than the small amount that occurs without neurotransmitter binding. A drug causes these sodium channels too close entirely. What could the drug be classified as Inverse agonist - this case represents an antagonist-like activity, but more severe than an antagonist A natural ligand (neurotransmitter) causes sodium leak channels to open, allowing more sodium to pass through than the small ...

Most prokaryotes require water availability (aw) to be greater then? ~ aw>0.91 Aquaporins ~ channel proteins that facilitate the passage of water (protect against osmotic stress) Halophiles ~ salt loving mechanosensitive channels ~ pressure sensitive channels that leak solutes from the cell, lowering cytoplasmic osmolarity Acidophiles ~ grow best in acidic habitats pH homeostasis ~ K+/H+ (acid) or Na+/