Channels that open due to a compound binding to receptor sites on the extracellular surface of the channels would be considered: non gated ion channels
voltage gated ion channels
ligand gated ion channels
g complex linked receptor proteins
carrier proteins
The Correct Answer is B
A. voltage gated ion channels: These open in response to changes in membrane potential, not chemical binding.
B. ligand gated ion channels: Ligands (like neurotransmitters) bind to the channel, causing it to open or close.
C. G-protein complex linked receptor proteins: These are receptors that activate intracellular signaling cascades, not ion channels directly.
D. carrier proteins: Carrier proteins transport substances across membranes but do not form open channels.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. from Side A to Side B: Osmosis is the movement of water from a region of lower solute concentration (10%) to one of higher solute concentration (20%) to equalize the concentration.
B. from Side B to Side A: This would occur only if Side A had a higher solute concentration, which it doesn't.
C. there will be no movement of water: There’s a concentration gradient, so water will move.
D. water will move from B to A and A to B at equilibrium: Equilibrium implies equal concentrations, which is not the case initially.
Correct Answer is D
Explanation
A. Urinary – Includes kidney & bladder; removes wastes: The urinary system includes the kidneys and bladder, which remove nitrogenous waste and regulate water and electrolyte balance.
B. Endocrine – Includes the hormone-producing glands: The endocrine system includes pituitary, thyroid, adrenal glands, etc., involved in metabolism, growth, and reproduction.
C. Respiratory – Includes lungs, involved in gas exchange & pH balance: The lungs are central to the exchange of O₂ and CO₂, which also helps regulate blood pH.
D. Digestive – Includes blood vessels, transports nutrients and gases to organs and wastes (CO2) from organs: Blood vessels are primarily part of the circulatory system, not the digestive system. The digestive system includes the mouth, esophagus, stomach, intestines, liver, pancreas, etc., which process food and absorb nutrients-not gas transport.
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