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steroid hormones because both diffuse into target cell easily

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Do trees have the ability to excrete waste in a manner similar to defecation, or in other words, can trees poop?

No, trees do not have the ability to excrete waste in a manner similar to defecation. They release waste products through processes like transpiration and leaf fall, but they do not "poop" in the way animals do.


How does the hypothalamus send TRH to the pituitary gland?

The hypothalamus sends the TRH hormone via some capillaries. Now, these are very special capillaries, yes they connect to the circulation, as capillaries do. However, these capillaries are different in that they act as a portal. In fact, they have a name for them too, called the hypothalamo-pituitary portal vessels. Basically how they work is, blood coming from the heart first integrates into the hypothalamus, and upon the exocytosis type of release from the nuclei within the hypothalamus that contain the hormones (talking about in this way the nuclui that produce the homones release those hormones directly into capillaries via a similar manner as how neurotransmitters are released into a synapse). Once the hormones are released into the capillaries of the hypothalamus-pituitary vessels, they travel down and into the anterior pituitary. Where they are actively transported into the cells of the anterior pituitary (notice nothing about the posterior pituitary, because that functions in a different manner).


What secretes and produces GnRH?

GnRH (gonadotropin-releasing hormone) is secreted and produced by a specific group of neurons located in the hypothalamus of the brain. These neurons release GnRH in a pulsatile manner, regulating the production and release of hormones involved in the control of the reproductive system.


How does food travel through the esophagus?

Food is pushed down the esophagus by a series of rhythmic muscle contractions called peristalsis. As food enters the esophagus, the muscles in the walls of the esophagus contract and relax in a coordinated manner to propel the food towards the stomach. The esophagus also has a sphincter at its lower end that opens to allow food to enter the stomach.


Cells with similar functions aggregate to form organelles?

Yes, organelles are specialized structures within a cell that perform specific functions. They are made up of aggregates of cells with similar functions, working together to carry out processes such as energy production, protein synthesis, and waste removal in a coordinated manner. This division of labor is crucial for the overall functioning of the cell and the organism.