0
What else can I help you with?
Does oxygen diffuse through a semipermable membrane?
yes
What is called when a molecule moves across a semipermable membrane into a region of a higher concentration?
When a molecule moves to a higher concentration it needs help of a pump. We call this facilitated diffusion. Osmosis only deals with the movement of water.
What is osmosis?
osmosis is a movement of a fluid that passes through a semipermable membrane
What is a osmosis?
Osmosis is the movement of a solvent (usually water) through a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration. This process helps maintain balance in cells and tissues by regulating the flow of water and dissolved substances.
Why diffusion of gases occurs in the alveolar region only?
Diffusion of gases occurs in the alveolar region only because this is where the thin walls of the alveoli allow for efficient exchange of oxygen and carbon dioxide between the air in the lungs and the blood in the capillaries. The high surface area and close proximity of the alveoli to the capillaries facilitate rapid diffusion of gases.
Will a semipermable membrane allow only water through and not any sugar disovled in water?
Yes, a semipermeable membrane will allow only water molecules to pass through, while blocking larger molecules like sugars dissolved in water. This process is known as osmosis, where water moves from an area of lower solute concentration to an area of higher solute concentration to achieve balance.
What typebof molecular movement consists of one-way diffusion across a semipermable membrane?
The type of molecular movement that involves one-way diffusion across a semipermeable membrane is called osmosis. Osmosis specifically refers to the diffusion of water molecules from an area of lower solute concentration to an area of higher solute concentration through the membrane. This process helps to balance solute concentrations on both sides of the membrane and is crucial for maintaining cellular homeostasis.
How does a red blood cell know its function since it does not have a nucleus?
RBC are more like a machine then a cell with a nucleus. Their actions are dependant on hormones, receptors, blood composition, etc. They have a semipermable membrane like most cells that let things like carbon dioxide, hydrogen, oxygen, and bicarbonate ions in and out. They are sort of like a bus that carries substances where they need to go in the body. Their actions are controlled by the nervous systems. When blood composition moves away from homeostaisis receptors (chemoreceptors, barorecptors, etc) are stimulated sending action potential to the brain (usually through the vagus, cranial, and glossopharygenal nerves). The specific part of the brain stimulated then releases hormones to move the blood back to homeostaisis (for example the adrendal medulla might release epnipherine).
