Answer:
The connection between cancer cells stimulates uncontrolled proliferation and tumor growth
Explanation:
In the tumor, cancer cells are interconnected by different types of proteins, which may act as receptors or amplify oncogenic signals. For example, in breast cancer, it has been shown that oncogenic cells are often connected through E-cadherin proteins that mediate their adhesion, thereby stimulating the cell movement and invasion (characteristic of tumor metastasis). In this case, E-cadherin membrane proteins function by enhancing effector response in cancer cells. The nucleus acts as the control center of the cell that modulates the expression of tumor suppressor genes in order to inhibit tumor metastasis.
The oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. This blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. From the left ventricle, the blood passes through the aortic valve to the aorta.
Answer and Explanation:
When talking about heart diseases, there are numerous factors that may aggraviate or increase the risk for heart disease, such as lifestyle choices including diet, drug consumption, smoking, etc.
- <u>High blood cholesterol levels</u> - consuming food high in cholesterol leads to the congregation of extra cholesterol in the the arteries.
<u>Solutions</u>: reduce the consumption of food that is high in cholesterol, such as eggs, cheese, and meat (especially red meat).
- <u>Low physical activity</u> - increases the probabilities of having obesity and high cholesterol, which could lead to heart disease.
<u>Solutions</u>: practice exercise often, e.g. a walk in the park every evening, going to the gym, running, swimming, etc.
- <u>Smoking</u> - this increases the probability of having a heart disease as it damages both the heart and blood vessels.
<u>Solutions</u>: avoid smoking at all costs.
When Earth passes directly between the Sun and the Moon, its shadow creates a lunar eclipse. Lunar and Solar eclipses happen with almost the same amount of frequency. Lunar eclipses are more visible because the Earth casts a bigger shadow on the Moon during a Lunar eclipes, but during a Solar eclipes the Moon casts a bigger shadow on Earth so its less visible.
