0
What else can I help you with?
How does nitric oxide cross the plasma membrane?
Nitric oxide can diffuse freely across the plasma membrane due to its small size and lipophilic nature. It does not require a specific transporter or receptor for entry into cells.
What is cell membrane permeability?
It is the ability of the membrane to allow ions and/or particles to cross.
What molecule must bind to to the cross bridge in order for it to disconnect with actin?
The cross-bridge must bind to ATP in order to disconnect from actin. When ATP binds to the cross-bridge, it allows for the power stroke to occur, leading to the dissociation of the cross-bridge from actin.
What causes cross bridge detachment?
Cross bridge detachment occurs when ATP binds to the myosin head, causing it to release from the actin filament. This process is necessary for the muscle to relax and reset for another contraction.
How can oxygen cross the membrane?
By the process of simple diffusion.
How does a receptor in the membrane transmit a message to the cell?
Receptors detect a signal molecule and perform an action in response.
What water-soluble hormone would most likely bind to what membrane proteins?
Channel linked receptors bind to neurotransmitters. (also called ion channels and ligand gated ion channels) A ligand is the signal molecule i.e the neurotransmitter. Hormones bind to intracellular receptors because hormones are non polar and can cross the cell's plasma membrane. (also called cytoplasmic receptors)
Why must some hormones bind to membrane receptor on a target cell's surface in order to activate it?
Some hormones are unable to cross the cell membrane due to their size or chemical properties, so they must bind to a membrane receptor on the cell's surface to propagate their signal into the cell. This binding triggers a cascade of intracellular events that ultimately lead to the cell's response to the hormone.
How does nitric oxide cross the plasma membrane?
Nitric oxide can diffuse freely across the plasma membrane due to its small size and lipophilic nature. It does not require a specific transporter or receptor for entry into cells.
Which substances are able to cross the membrane, and what determines their ability to do so?
Certain substances, such as small molecules and ions, are able to cross the cell membrane. The ability of a substance to cross the membrane is determined by its size, charge, and solubility in the lipid bilayer of the membrane.
What is the definition of impermeable?
A membrane that lets all materials cross is permeable. A membrane that lets nothing cross is impermeable.
Can pyruvate cross the mitochondrial membrane?
Yes, pyruvate can cross the mitochondrial membrane through specific transport proteins.
Can small hydrophobic molecules cross the cell membrane?
Yes, small hydrophobic molecules can cross the cell membrane.
Can nonpolar molecules cross the cell membrane?
Yes, nonpolar molecules can cross the cell membrane through simple diffusion.
Which molecule of a membrane describes whether molecules can cross the membrane?
permeability
Which feature of a membrane describes molecules whether can cross the membrane?
permeability
What feature of membrane describes whether molecules can cross the membrane?
permeabiity
