Hormones are chemical messengers secreted into blood or extracellular fluid by one cell that affect the functioning of other cells. In very basic terms, binding of hormone to receptor triggers a cascade of reactions within the cell that affects function.
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Hormones in the bloodstream are able to affect target cells/organs and not other cells/organs because of selective permeability. This means that hormones are only able to pass through the cell membrane of certain cells and organs, and not through the cell membrane of other cells and organs. The cell membrane of the target cells and organs are specialized to allow the hormones to pass through, while the cell membrane of other cells and organs are not specialized and are therefore impermeable to the hormones. This is due to the presence of receptor proteins on the cell membrane of the target cells and organs. These receptor proteins can bind to the hormones and facilitate their entry into the cell. Since these receptor proteins are not present on the cell membrane of other cells and organs, the hormones are unable to bind to them and therefore unable to cross the cell membrane. In addition, hormones can be broken down by enzymes in the bloodstream, which means they can’t reach their target cells and organs if they are exposed to the enzymes. This further ensures that hormones only affect the target cells and organs, and not other cells and organs. In summary, hormones in the bloodstream are able to affect target cells and organs and not other cells and organs because of selective permeability and the presence of receptor proteins on the cell membrane of the target cells and organs. Other cells and organs do not have these specialized receptor proteins and therefore cannot be affected by the hormones.
hormones
The nucleus is the part of a plant cell that controls the activities of other cells. It contains the cell's genetic material, including DNA, which regulates various cellular processes and functions.
The pituitary gland, often referred to as the "master gland," secretes hormones that regulate the functions of other endocrine glands in the body. These hormones control growth, metabolism, reproduction, and various other physiological processes by signaling and coordinating the activities of other glands.
Because they only activate target cells that have special receptors that only work when that specific hormone attaches to it.
Hormones
I suppose that you think to oxygen.Oxygen is indispensable for life.
Hormones are not cells but chemicals released by cells to affect changes in other cells.
It could change your behavior and other physical things.
Hormones in the bloodstream are able to affect target cells/organs and not other cells/organs because of selective permeability. This means that hormones are only able to pass through the cell membrane of certain cells and organs, and not through the cell membrane of other cells and organs. The cell membrane of the target cells and organs are specialized to allow the hormones to pass through, while the cell membrane of other cells and organs are not specialized and are therefore impermeable to the hormones. This is due to the presence of receptor proteins on the cell membrane of the target cells and organs. These receptor proteins can bind to the hormones and facilitate their entry into the cell. Since these receptor proteins are not present on the cell membrane of other cells and organs, the hormones are unable to bind to them and therefore unable to cross the cell membrane. In addition, hormones can be broken down by enzymes in the bloodstream, which means they can’t reach their target cells and organs if they are exposed to the enzymes. This further ensures that hormones only affect the target cells and organs, and not other cells and organs. In summary, hormones in the bloodstream are able to affect target cells and organs and not other cells and organs because of selective permeability and the presence of receptor proteins on the cell membrane of the target cells and organs. Other cells and organs do not have these specialized receptor proteins and therefore cannot be affected by the hormones.
Because they only activate target cells that have special receptors that only work when that specific hormone attaches to it.
hormones
The nucleus is the part of a plant cell that controls the activities of other cells. It contains the cell's genetic material, including DNA, which regulates various cellular processes and functions.
Hormones i forgot the other ones
The pituitary gland, often referred to as the "master gland," secretes hormones that regulate the functions of other endocrine glands in the body. These hormones control growth, metabolism, reproduction, and various other physiological processes by signaling and coordinating the activities of other glands.
Because they only activate target cells that have special receptors that only work when that specific hormone attaches to it.
Tropic hormones act by stimulating the release of other hormones from target glands, which in turn produce a physiological response. Nontropic hormones directly bind to receptors on their target cells to initiate a cellular response without involving other hormones.