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If hormones travel in the bloodstream why don't all tissues respond to all hormones?
Wiki User
∙ 8y ago
The tissue/cells need a receptor that can interact with that hormone in order to respond to it. This receptor may be on a cell membrane, inside the cell, or even inside the nucleus (in the case of steroid hormones, for example.)
Like many organic chemicals in the body, they have structures which result in certain parts of the molecule being presented to cells (active sites). Because cells and tissue have different structures as well, only certain cells will react to the presence of a particular hormone.
Many hormones have antagonist hormones that cause an opposite effect. This helps control negative feedback when the target organ's hormone levels are too high.
Wiki User
∙ 8y ago
Wiki User
∙ 10y agoNo organs are targets for hormones, target cells and target tissues are the only things that can be influenced by hormones. The classical idea is that the hormones are like keys that fit into locks in the target cells and tissues.
Wiki User
∙ 13y agoThe answer is simple: Only those tissues that require hormone interaction have "target" cells that recognize the hormone and are called to action.
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How do your hormones travel?
The endocrine glands secrete hormones directly into the bloodstream. The hormones then travel to target tissues via the circulatory system.
What organs do hormones travel from endocrine glands through bloodstream?
Hormones travel from endocrine glands through bloodstream to target organs.
What are hormones and what are they used for?
Hormones are chemical messengers. They travel in your bloodstream to tissues and organs. They affect many different processes, including growth, development, metabolism, and reproduction. They are secreted directly into your bloodstream by endocrine glands, such as the pituitary, adrenal glands, pancreas, ovaries, and testes.
What is a chemicals travel through the bloodstream and affect the activities of other cells?
I suppose that you think to oxygen.Oxygen is indispensable for life.
Chemicals that travel through the bloodstream and affect the activities of other cells?
Hormones
What are hormonal and physical changes?
Hormones are the chemical messengers in the body that travel the bloodstream to the organs and tissues. They work slowly and affect many of the body's processes over time. Endocrine glands, which are special groups of cells, make hormones. Where physical changes such as growth etc. are the ultimate results of these hormones.
What hormones are able to travel through the bloodstream and affect cells throughout distant parts of the body?
Hormones of the endocrine glands.
Do all hormones need to enter bloodstream to be able to effect a cell?
Yes when they are from distant glands, for example when ADH (synthsised in the posterior pituitary gland) must travel to the kidney. However, some hormones are made on-site, so do not use the bloodstream to travel to their target organ(s)/cell(s).
What are specialized cells in the brain that are able to travel through the bloodstream and affect cells throughout distant parts of the body?
Hormones
How do hormones move around the body?
There is more than one type of hormone: autocrine hormones act on the cells that produce them. Paracrine hormones act on the cells nearby and get to them by diffusing through the fluid that bathes the cells. The most common hormone class is the endocrine hormones- these are secreted from cells and move into the nearby capillaries which carry blood. Once they are in the blood they can reach almost every tissue in the body just by flowing through the blood vessels.
How do hormones reach the cells they affect?
The traditional approach is that human and animal hormones are produced in endocrine glands, which release them directly into blood, and the bloodstream carries them to their target cells. However, it doesn't necessarily have to be blood, it can be tissue fluid as well. (And not all organisms that have hormones have blood either. In plants for example, hormones can migrate to other cells from the site of production through the plasmodesmata that connect neighboring cells.)
What are the endocrine system's messengers and how are they carried through the body?
The endocrine system produces hormones which usually travel by way of the blood. Some don't have to travel very far and just diffuse through the tissues.
