Without exercise, her muscles might atrophy.
The correct answers are:
• How soluble the hormone is in water. Depending on is it hydrophilic or hydrophobic. For example steroid hormones (derived from lipids) are hydrophobic, meaning that are insoluble in water so they must have transport protein for the blood transport.
• whether the hormone will be able to move through the cell membrane. Hormones derived from lipids are able to pass through the membrane because are able to diffuse through the lipid bilayer. Hydrophilic hormones (from amino acids) are unable to diffuse through the lipid bilayer
• whether the hormone interacts with receptors on the cell membrane.
• whether the hormone interacts with receptors inside the cell
Hormones that diffuse freely through the membrane have internal receptors. Others have cell membrane receptors.
<h2>
Nucleus - control center</h2>
The nucleus is called the control center of the cell because:
- The genetic material which is the essence of life is hosted in the nucleus – the DNA-which presents the code of life or information or instructions regarding:
- The structure and function of each cell and the organ it is present,
- Numerous activities of life like reproduction, metabolism, growth, development, etc.
- The nucleus replicates the genetic information and passes to the new daughter cells, generation after generation to continue the life processes.
- The nucleus DNA transcribes the code or information for protein synthesis to the RNA to synthesize proteins in the body which carry out many essential functions in the form of structural proteins, antibodies, hormones, pigments, etc.
- The nucleus DNA synthesizes enzymes which carry out functions like metabolism.
The dual action of capillary "sucking" within its xylem, and the loss of water at leaves surface, both of which pulls water upwards
