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What part of the lung do oxygen molecules diffuse across into the bloodstream?
Oxygen molecules diffuse across the alveolar membrane in the lungs into the bloodstream. This is where gas exchange occurs, with oxygen moving from the alveoli into capillaries surrounding the alveoli.
Which substances readily diffuse through the membrane?
Small and non-polar molecules can readily pass through the cell membrane. They follow the concentration gradient, moving from the higher concentration area to the region of lower concentration.
Are red or pink tones in skin due to hemoglobin in blood moving through capillaries?
yes as it moves through the capillaries in the dermis it can give off a reddish pinkish hue
How do molecules of a gaseous substance diffuse through the air?
gas diffuses through the air faster when their is more energy (heat) causing air particles to move and mix faster than normal when a gas is cooled the particles are forced to squeeze together there for stopping diffusion. D.Smith age 11
The larger the cell the more trouble it has moving water and nutrients through the what?
The larger the cell, the more trouble it has moving water and nutrients through the cell membrane. This is because as the cell size increases, the surface area to volume ratio decreases, making it harder for molecules to diffuse across the membrane efficiently.
How does the size of molecules affect diffusion?
The smaller the molecule, the faster it can diffuse through a medium. Larger molecules have more difficulty moving through the medium due to their size and shape, which slows down the rate of diffusion.
What is the last heart chamber that blood leaves through before moving toward capillaries in the arm?
left ventricle
What three things can molecules moving with kenetic energy do?
Molecules moving with kinetic energy can collide with other molecules or surfaces, transfer energy to other molecules through collisions, and change direction due to interactions with other molecules in their environment.
What term describes the process of water molecules moving through a cell membrane from an area of higher concentration to an area of lower concentration?
This process is known as osmosis. It is a type of passive transport where water molecules diffuse across a semi-permeable membrane to equalize the concentration of solute inside and outside of the cell.
How many valves capillaries?
Well the capillaries produce the more the body moves. If someone is running a marathon for example, the capillaries will start to reproduce to help get the blood moving. And capillaries dont have valves.
Why would rising temperature speed up diffusion in a liquid?
Rising temperature increases the kinetic energy of molecules in a liquid, causing them to move more quickly and collide more frequently. This increased motion leads to faster diffusion as molecules spread out more rapidly.
What the molecules are doing in heat Conduction?
In heat conduction, molecules transfer kinetic energy to neighboring molecules through collisions. As a result, the faster-moving molecules transfer energy to slower-moving molecules, leading to an overall transfer of heat energy through the material. The molecules vibrate and move more rapidly as they gain energy, increasing the temperature of the material.
