Does the hormone enter the target cell or only bind to the surface receptor?

(1) The internal environment, also known as extracellular fluid, is composed of plasma, tissue fluid and lymph The internal environment of capillary wall cells is plasma and tissue fluid; The internal environment of capillary lymphatic wall cells is lymph and interstitial fluid; The internal environment of hepatocytes is interstitial fluid; The inner environment of blood cells is plasma

2) The characteristics of hormone regulation are: trace and efficient, through the transport of body fluids, acting on target organs and target cells, hormones will be inactivated after they play a role

3) The action characteristics of auxin are twofold, which can both promote and inhibit growth; It can both promote and inhibit germination; It can not only prevent flower and fruit fall, but also thin flowers and fruits

4) The key to sampling is random sampling, which is representative and not affected by subjective factors

So the answer is: 1) plasma and interstitial fluid, lymphatic and interstitial fluid, interstitial fluid, plasma.

2) Trace and efficient, through the transport of body fluids, acting on target organs, target cells for inactivation.

3) duality, such as both promoting and inhibiting growth; It can both promote and inhibit germination; It can not only prevent flower and fruit fall, but also thin flowers and fruits

4) Random sampling is representative and not affected by subjective factors.

Target cell - in layman's terms, it is the target daughter cell.

Receptors... Well... Think of it as a specific protein.

The target cells of different plant hormones may be the same, and the target organs of different species and generic plant hormones may be the same, and the effect may be opposite; Plant growth regulators refer to synthetic chemicals that have a regulatory effect on the growth and development of plants. Auxin analogue is a plant growth regulator, which has been widely used in production, but the scope and category of different hormone target cells are different.

Summary. Hormones are specific. Hormones act on specific target cells or organs.

The target cells or organs that hormones act on are specific.

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Hormones are specific. Hormones act on specific target cells or organs.

It's wrong.

The range spreads and is specific.

Can that give an example.

For example. Chinese will farm, the scope is large, it should be Chinese farmers can farm.

No, I mean, as an example of biology, for example, specific hormones target organs.

Dear, wait a minute. Thyrotropin-releasing hormone only controls the thyroid gland.

So. Please give me an example that doesn't match the "specificity", thank you.

Dear, wait a minute. Thyroid hormones act throughout the body.

1) Hormones are transported to the whole body through body fluids (or blood), and each hormone can only act on specific target cells because only on the target cells can have specific receptors that can bind to the corresponding hormones, which reflects the function of the cell membrane to transmit information Hormones are inactivated once they act on the target cells, so the body needs to produce hormones continuously

2) If the endocrine gland X is the thyroid gland, then hormone A is thyrotropin-releasing hormone 3) Hormone C is a thyroid hormone, and the target cells in the human body are almost all over the body To demonstrate the regulatory relationship between thyroid-stimulating hormone and thyroid hormone, thyroid hormone can be injected into isolated pituitary tissue, and then the changes in the concentration of thyroid-stimulating hormone in its culture environment before and after injection can be measured to determine the regulatory relationship between them

So the answer is: 1) Inactivation of humoral (or blood) specific receptors.

2) Thyrotropin-releasing hormone (or TRH).

3) Almost whole body cellular C b

Whether the hormone can act on the target organ and the target cell.

a. Most hormones are specific and only act on a specific target organ or cell, but insulin.

and the target cells of thyroid hormones are almost all body tissue cells, a mistake;

b. The increase in blood glucose content will cause an increase in the secretion of insulin by pancreatic B cells, B error;

c. Increased osmotic pressure of extracellular fluid will cause antidiuretic hormone released by the pituitary gland.

Increase, promote the reabsorption of water by the renal tubules and collecting ducts, reduce urine output, c error;

d. When thyroid hormone is secreted excessively, it will inhibit hypothalamic thyroid-stimulating hormone.

Release hormone and secretion of pituitary thyroid-stimulating hormone, d correct Therefore, d

Whether the hormone can act on the target organ and the target cell.

Some hormones act on receptors on the surface of cell membranes (protein-like hormones);

Some hormones enter cells and act on receptors (lipid hormones) inside the cells.

So, some hormones can enter target cells.