While explaining cellular membrane potentials, the instructor states that during an action potential, the cell membrane becomes more permeable to which mineral/electrolyte?

during action potential the cell membrane becomes more permeable to sodium ions to depolarized the cell to pass the nerves

Explanation: During resting potential the cell membrane contain more potassium ions inside of the cell then outuside to keep the cell negatives internally and this job has been doing by sodium -potassium  pump which push two k+ ions inside of the cell & pulled 3 Na+ ions outside of the cell and thus maintain resting membrane potential but when neurotransmitter attached to the channels and tells it to open.So, they activate the m  sodium gate which usually  closed at resting membrane potential and start the movement of more sodium ions to inside of the cell to depolarize the it.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

the elements of art are the visual tools that the artist uses to create a composition. these are line, shape, color, value, form, texture, and space.

the principles of art and design are balance, contrast, emphasis, movement, pattern, rhythm, and unity/variety.