Physiology module 2 sync session A

These flashcards cover key concepts from the lecture notes on cell biology, focusing on transport mechanisms, membrane potentials, and the sodium-potassium pump.

What is the focus of the course in terms of detail on science experiments?

The focus is more on concepts and their application rather than detailed science experiments.

What kind of mathematical concepts should students expect in this course?

Zero math, zero equations; focus is on comparisons rather than calculations.

What happens to a cell placed in a hypertonic solution?

The cell will shrink because water moves out of the cell to balance the higher concentration outside.

How does active transport differ from passive transport?

Active transport requires energy (ATP) to move substances against their concentration gradient.

What is the resting membrane potential range for cells?

The resting membrane potential typically ranges from negative 70 to negative 90 millivolts.

What is the equilibrium potential for potassium?

The equilibrium potential for potassium is approximately negative 94 millivolts.

What is the purpose of the sodium-potassium pump?

The sodium-potassium pump maintains concentration gradients of sodium and potassium across the cell membrane.

What initiates an action potential?

An action potential is initiated when a membrane potential reaches a threshold, typically around negative 55 millivolts.

What occurs during depolarization in a neuron?

During depolarization, sodium channels open, allowing sodium ions to enter the cell, making the inside more positive.

What is the role of potassium during repolarization?

During repolarization, potassium channels open, allowing potassium to exit the cell, making the inside more negative.