Pancreas
It releases insulin to lower blood sugar and glucagon to raise blood sugar
Answer:
Mitochondria - Turning on the Powerhouse
Explanation:
Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell. The biochemical processes of the cell are known as cellular respiration.
Highly reactive atoms or molecules that can cause damage to cells are called free radicals.
<span>Free radical is an atom, molecule, or ion that has an unpaired valence electron (electron in outermost shell). Because of that, free radicals are very unstable and they react quickly with other substances in order to make up the number of electrons in their outer shell. Free radicals may be generated in many different ways such as redox reactions, ionizing radiation, heat, electrical discharges..</span>
<span>Oxidative stress is a process which happens within the body and it is caused by oxygen free radicals or reactive oxygen species (ROS). Oxidative stress can damage cells, leading to a range of diseases and cause aging.</span>
When did frogs evolve? Frogs developed out of lungfish about 375 million years ago, in the Devonian period. They used their lungs to leave the water and live on land
Answer:
Mutations in the active site induce a continue 'switch-on state' of the Ras proteins
Explanation:
Ras is a family of GDP/GTP-binding proteins expressed in all animal cells. Ras proteins play roles in signal transduction pathways, where they are activated to subsequently 'switched on' other proteins involved in diverse cellular processes including cell growth, cell differentiation and survival. In consequence, the Ras genes are considered to be oncogenes because when they are overexpressed in cells their encoded proteins produce uncontrolled cell proliferation, thereby leading to cancer progression.