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Ameena McCoullum

Physiology Week 1-6

QuestionAnswer
What is the primary goal of all physiological control systems? To maintain internal stability (Homeostasis) despite external change.
Why are negative feedback loops considered stabilizing in physiology? Because they counteract deviations and push conditions back toward the normal set point.
Give one physiological process governed by positive feedback Oxytocin-mediated uterine contractions during labor amplification
Why is water physiologically essential for reactions? it dissolves solutes, allows chemical reactions to occur in solution, and stabilizes temperature.
What makes enzymes crucial to physiology even though they are not reactants? They lower activation energy, allowing reactions to proceed at body temperature and rate.
Why does pH influence physiological function? Most enzymes and proteins lose function outside narrow pH ranges.
ATP is constantly regenerated -explain why physiologically. ATP use is continuous for transport, syntheses, and motion, so cells must replenish it to stay alive.
What defines a membrane transport process as "passive" in physiology? It does not consume metabolic energy (ATP).
What would happen physiologically if all sodium-potassium pumps suddenly stopped? Gradients would collapse, impairing nerve signaling and cell volume control.
Why is osmosis a physiological phenomenon rather than an anatomical one? It regulates water balance as a functional response to solute differences, not structure.
Why is transcription required before translation in cell physiology? DNA cannot leave the nucleus; m carries usable instructions for protein synthesis.
How do ribosomes express physiological function rather than anatomy? They perform the functional act of building proteins, not merely existing as structures.
Cellular respiration is physiologically central-explain why. it extracts energy from nutrients to generate ATP that powers all cellular work.
Why do cells divide (mitosis) from a physiological perspective, not anatomical? To maintain tissue function through repair, replacement, and regulated growth.
What is apoptosis in physiological terms? A programmed self-destruction pathway that removes cells without inflammation.
What makes stem cells physiologically valuable? They can self-renew and differentiate to restore functional cell populations.
Hormone signaling is a physiological, not anatomical, concept -explain. IT governs functional responses through chemical messengers acting on target cells
Why are buffers required in physiology? They resist sudden pH changes that would disrupt enzyme function and metabolism.
What makes facilitated diffusion physiologically distinct from simple diffusion? It uses membrane proteins to move specific solutes without ATP.
Why is temperature regulation classified under physiology? It involves functional responses (Sweating/shivering) that change internal state, not structure.
Created by: amccoullum
 

 



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