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The receptors for smell are activated when?
dissolved odorants bind to the receptors in the cilium membranes.
How can signal molecules remain outside of cells but still create changes in activity inside cells?
Signal molecules can bind to specific receptors on the cell surface, which triggers a series of signaling events inside the cell. This can lead to changes in enzyme activity, gene expression, or cellular processes. The signal molecules do not need to enter the cell to create these changes as the signaling events are often propagated through complex cascades of cellular machinery.
Hydrophobic signal molecules can interact with what intracellular receptors?
Hydrophobic signal molecules can interact with intracellular receptors, such as nuclear receptors and cytoplasmic receptors. These receptors are typically located inside the cell and can directly bind the hydrophobic signal molecules, leading to changes in gene expression and cellular function.
How many oxygen molecules bind to myoglobin?
1 Each myoglobin molecule has one heme group and can bind one oxygen molecule. Hemoglobin on the other hand can bind up to 4 molecules of oxygen.
What binds to receptor molecules on the host cell membrane?
Ligands bind to receptor molecules on the host cell membrane. These ligands can be hormones, neurotransmitters, or other signaling molecules that trigger a cellular response when they bind to their specific receptors.
What do signal molecules bind to in cells?
Receptor Proteins
The receptors for smell are activated when?
dissolved odorants bind to the receptors in the cilium membranes.
Why do simple covalent molecules have a smell?
Simple covalent molecules have a smell because they can bind to receptors in our nose, triggering a signal to the brain that we interpret as a smell. Different molecules bind to different receptors, leading to a variety of smells. The specific shape and chemical properties of the molecule determine which receptors it can bind to, creating the perception of smell.
How can signal molecules remain outside of cells but still create changes in activity inside cells?
Signal molecules can bind to specific receptors on the cell surface, which triggers a series of signaling events inside the cell. This can lead to changes in enzyme activity, gene expression, or cellular processes. The signal molecules do not need to enter the cell to create these changes as the signaling events are often propagated through complex cascades of cellular machinery.
Which of these extracellular signal molecules could diffuse through a plasma membrane and bind to an intracellular receptor?
Small hydrophobic molecules like steroid hormones can diffuse through the plasma membrane and bind to intracellular receptors, which then translocate into the nucleus to regulate gene expression.
Hydrophobic signal molecules can interact with what intracellular receptors?
Hydrophobic signal molecules can interact with intracellular receptors, such as nuclear receptors and cytoplasmic receptors. These receptors are typically located inside the cell and can directly bind the hydrophobic signal molecules, leading to changes in gene expression and cellular function.
How do smell and taste receptors respond to stimuli in the environment?
Smell and taste receptors respond to stimuli in the environment by detecting specific molecules. In the case of smell, odor molecules bind to receptors in the nose, triggering a signal to the brain. For taste, molecules in food or drink bind to taste receptors on the tongue, sending signals to the brain to interpret different tastes.
What small molecules bind to hemoglobin?
Carbon dioxide and BPG bind to amino acids located on hemoglobin. Oxygen molecules bind to the iron molecules located in the heme. Each hemoglobin molecule can carry up to four oxygen molecules, one on each of the four iron molecules. Nitric oxide can also bind to hemoglobin when either oxygen or carbon dioxide are bound to the hemoglobin.
What membrane surface molecules bind to proteins and serve as molecules identification tags?
Carbohydrates
How many oxygen molecules bind to myoglobin?
1 Each myoglobin molecule has one heme group and can bind one oxygen molecule. Hemoglobin on the other hand can bind up to 4 molecules of oxygen.
What is the method used to detect an odor?
The method used to detect an odor is through olfactory receptors in the nose that detect airborne odorant molecules. These molecules bind to the receptors, triggering a signal to the brain that is interpreted as a specific smell.
What transmits information into a cell by binding to signal molecules?
One of the most common molecules of the cell that transmit information from outside to inside are transmembrane receptors. Typically, a ligand will bind to to exterior portion and trigger receptor activation, leading to downstream signaling within the cell.
