Target Cells
Because they only activate target cells that have special receptors that only work when that specific hormone attaches to it.
receptor
Receptor molecules are found on cell surfaces and respond to nerve and hormone signals.
effectors
target cells
Only target cells respond to hormones because they have a receptor for the hormone. They are the key that fits the lock.
Hormones can only be detected by cells that have the specific receptor which binds to the hormone. This means that the hormone only acts on the cells with its receptor and the other cells do not respond.
Because they only activate target cells that have special receptors that only work when that specific hormone attaches to it.
the t-cells release hormone-like substance called
receptor
Thyroid stimulating hormone, released from the anterior pituitary gland.
Your body's hormonal system (the endocrine system) is not programmed to respond to a lack of calcium in the diet. If it did have an opportunity to respond to low levels of calcium it might secrete more calcitonin, the hormone that helps build bone by decreasing blood calcium levels and encouraging the bone-building cells called osteoblasts to produce mature bone cells called osteocytes.
An osteoclast.
Receptor molecules are found on cell surfaces and respond to nerve and hormone signals.
The male gametes called sperm cells and the hormone is testosterone.
target cells
A hormone is a chemical, not a cell. They thyroid gland that secretes the thyroid hormone (which is called thyroxin) is composed of cells.