Answer:
Water soluble hormone binds to the membrane bound receptors whereas lipid soluble hormones bind to the internal/intracellular receptors.
Explanation:
Hormones are called regulators because they can either stimulate or inhibit the target cell's activity.
They perform their action by binding to specific protein on target tissue called hormone receptors. Each receptor is specific for a particular hormone. The hormone-receptor complex bring about the biochemical changes in the target cell.
Hydrophillic or water soluble hormones interact with the membrane bound receptors. They result in the generation of secondary messengers such as cyclic AMP. Secondary messengers bring about the cascading action amplifying the final effect. That is why even a very small quantity of hormone is sufficient for a powerful cascading effect.
Lipid soluble hormones can diffuse through the plasma membrane and thus they bind to the intracellular receptors. The hormone-internal receptor complex enters the mucleus and regulates gene expression. Example: steroid hormones and thyroid hormones.
<u>Answer:</u>
The process of reproducing offspring from female eggs without any male involvement.
<u>Advantages</u>
1- Rapid production of numerous offspring and there is need of male gametes.
2- Require less amount of time and energy
3- Offspring are the exact copies of the parents and are called clones as they are similar morphologically and genetically.
<u>Disadvantages</u>
1- There is no genetic variability.
2- No new genetic combinations which can be a threat for their survival during population selection.
The answer is A: 'The central vacuoles contain little water'. Wilting occurs due to a plant losing more water than it can absorb through its roots from the ground. Wilting results in a loss of turgor pressure<span> to almost zero.Typically, wilting occurs during very low soil moisture conditions. However, wilting can also occur under extreme cold conditions and in very saline soil.</span>
Homeostasis involves maintaining balance of several factors that make a cell healthy. The job of the cell membrane is to regulate the passage of materials into and out of the cell. In order for any materials to go in or out of the cell, they must cross through the cell's membrane.
Hope this helped
- Danielle xo
