Cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. Cells are the basic unit of structure in all organisms and also the basic unit of reproduction. With continual improvements made to microscopes over time, magnification technology advanced enough to discover cells in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, also known as cell biology. Over a century later, many debates about cells began amongst scientists. Most of these debates involved the nature of cellular regeneration, and the idea of cells as a fundamental unit of life. Cell theory was eventually formulated in 1839. This is usually credited to Matthias Schleiden and Theodor Schwann. However, many other scientists like Rudolf Virchow contributed to the theory. It was an important step in the movement away from spontaneous generation.
The three tenets to the cell theory are as described below:
All living organisms are composed of one or more cells.
The cell is the basic unit of structure and organization in organisms.
Cells arise from pre-existing cells.
The first of these tenets is disputed, as non-cellular entities such as viruses are sometimes considered life-forms.
Microscopes
Discovery of cells
The answer would be respiratory. Because asthma affects your breathing which is what the respiratory system is used for. (Lungs)
The limbic system is a set of brain structures, not a separate system which is located on both sides of the thalamus and it includes structures from the telencephalon, diencephalon, and mesencephalon. This system is involved in feeling the emotions such as joy and happiness. For example, nucleus accumbens is part of the limbic system and it is involved in reward and pleasure that can make happiness.
Besides that, the precuneus (located in front of the upper portion of the occipital lobe) is involved in feeling happiness. Scientists have shown that there is a positive correlation between the volume of grey matter in the right precuneus and the subject's subjective happiness score.
Answer:Yess they are both involved in the process of proteins synthesis.
Answer:
The characteristic that is not a function of the receptors is to receive glucose molecules.
Explanation:
The receptors are structures made up of proteins or glycoproteins whose function is to <u>receive specific signals</u>, which determine intracellular changes and promote an effect or action.
Most of the receptors are located on the surface of the cells, serve for cell recognition and are capable of receiving stimuli from neurotransmitters and hormones.
Glucose is a biomolecule that does not constitute a stimulus or possess a specific receptor and enters the cell with the use of a specific transporter.
