Answer:
B) expression of inappropriate gene products
Explanation:
Most of the cancers are caused when a normal gene that code for one or other proteins involved in the regulation of the cell cycle is mutated. The mutated gene may cause the production of the faulty gene products. For example, the overproduction of products of the protooncogene that push cells through the cell cycle leads to tumor formation. Likewise, when the tumor suppressor genes are not able to produce enough product to prevent progression through the cell cycle, cancer may develop.
Proper nutrition promotes growth, leads to health and longevity, and promotes intellectual growth by affecting the brain and psyche.
Nature in general refers to the phenomenon of the physical world as well as life; It also extends from subatomic particles to the universe itself.
Answer:
Pulmonary circuit
Explanation:
Pulmonary circuit of blood circulation serves to carry the deoxygenated blood from the right ventricle of the heart to the lungs and then returns the oxygenated blood from the lungs to the left atrium of the heart. The pulmonary trunk carries the deoxygenated blood from the right ventricle to the lungs.
The right pulmonary artery and the left pulmonary artery of the pulmonary trunk carry the blood to the right and left lung respectively. After the gaseous exchange, the pulmonary capillaries unite to form venules and finally the pulmonary veins which in turn carry the oxygenated blood to the left atrium.
Cell membrane fluidity is determined by many things, including the presence of or absence of saturated and or unsaturated fatty acid tails, and because of that the ability of the phospholipids in a cell membrane to tightly pack together or not. I believe though in terms of an additional substance it would have to be cholesterol. These specific lipid molecules are inserted in between the phospholipids preventing phospholipids from tightly packing together thus allowing the cell membrane to have greater fluidity and flexibility.
Sensation
<h3>How does sensory transduction work?</h3>
Action potentials, or electrical impulses, are nearly entirely how the brain functions. (This is not the complete picture; there are more chemical components, but for the sake of this response, we will disregard them.) How to turn an universe of non-electrical inputs into a signal that the brain can understand is the issue at hand. Therefore, we have transducers—things or structures that can convert various forms of energy into electrical impulses that our brains and, incidentally, electronics can use.
On their cell membranes, sensory cells express a variety of chemicals. These structures serve a range of purposes, including supporting tissue integrity, acting as receptor sites, and carrying out signaling processes. The majority of these receptors react to chemical stimuli, such as those that adrenaline binds to in the heart, those that muscles express in the form of insulin and glucagon receptors, and so on. Some of these structures will, however, react to outside forces.
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