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diffusion, through moist thin, epithelial cells
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∙ 13y ago
Dajonaye Rickard
diffusion through moist thin epithelial cells
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The compounds in biological membranes that form a barrier to the movement of hydrophilic materials across the membranes are?
lipids
What does it mean to say most biological membranes are selectively permeable?
Selectively permeability is a property of biological membranes that allows them to regulate the passage of substances across them. In spite of heavy traffic through them, cell membranes are selectively permeable, and substances do not cross the barrier indiscriminately.
How charged particles like Na and K move across membranes?
ion pumps
What are Transports that requires energy from ATP to move substances across membranes?
active transport
When some substances can pass across them but others cannot?
membrane
Which transport mechanism causes the respiratory gases to move across the alveolar pulmonary capillary membranes?
Diffusion
Explain how changes in the alveolar structure cause a decrease in the blood oxygen levels in emphysema?
Decrease in alveolar surface area results in less boundary across which oxygen can be absorbed into the blood.
What is the process called in which oxygen enters the body and carbon dioxide exits the body?
Oxygen and carbon dioxide travel into and out of the bloodstream via diffusion across alveolar and capillary membranes.
Explain how the changes in alveolar structure cause a decrease in blood oxygen levels in emphysema?
Pneumonia fills the lung's alveoli with fluid, keeping oxygen from reaching the bloodstream.
Generation of proton gradients across membranes occur during?
Generation of proton gradients across membranes occurs?
Is alveolar ventilation the same as alveolar respiration?
If we think of the lungs as trees branching out, the alveoli are at the end. They are made of up clusters of small delicate sacs. This is where the oxygen you breathe in seeps across into the blood and the carbon dioxide (a "waste product" of all the things the body makes and does) comes out of the blood (and is then breathed out). It is the delicate structure and nearness to the blood vessels that allow this passage of oxygen in and carbon dioxide out. Pretty cool!
What moves across the membranes by osmosis?
Solvent
The compounds in biological membranes that form a barrier to the movement of hydrophilic materials across the membranes are?
lipids
What causes alveolar sacs to fuse together?
Alveolar sacs is the structural unit of lungs.Tiny blood capillaries fuse together to make up an alveolar sac.This structure of the sac is very important for the easy diffusion of respiratory gases across the membrane.
How do molecules diffuse across membranes?
the reach equilibrium
How fluids move across capillary membranes?
Osmosis.
What is required to transport glucose molecules across the cell membranes of the intestine?
To start the process ATP is required to transport glucose milecules across the cell membranes of the intestine.
