Answer: 1. Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
2. Plasma is the main component of blood and consists mostly of water, with proteins, ions, nutrients, and wastes mixed in. Red blood cells are responsible for carrying oxygen and carbon dioxide. Platelets are responsible for blood clotting. White blood cells are part of the immune system and function in immune response.
3.Within the bone marrow, all blood cells originate from a single type of unspecialized cell called a stem cell. When a stem cell divides, it first becomes an immature red blood cell, white blood cell, or platelet-producing cell.
4. Epinephrine and norepinephrine, hormones secreted by the adrenal medulla, raise blood pressure by increasing heart rate and the contractility of the heart muscles and by causing vasoconstriction of arteries and veins. These hormones are secreted as part of the fight‐or‐flight response.
Answer:
Modern people are using the Earth for many things like farming, technology, art, and more.
Explanation:
Farming is a form of agriculture, people who farm can make money off of selling their crops, and they can also feed themselves.
Technology is a mix of mathematics, science, and the arts. Without technology, phones, laptops, cars, and other electronics would not exist right now. We need cars for transportation to get from Point A to Point B, and we use our phones and laptops for communication and entertainment.
Art is the form of human activities in creating visual, auditory or performing artifacts. Without art, life wouldn't be very pleasurable. People want to express themselves, and people want to see beauty. Art also helps historians tell about the past.
Hope this helped!
Answer:
hydroxylation of phenylalanine to tyrosine
Explanation:
Phenylketonuria is an inherited disease that results from the lack of the enzyme phenylalanine hydroxylase (PAH), which catalyzes the hydroxylation of phenylalanine go tyrosine. A build up of phenylalanine could result to mental instability , intellectual problems and seizures. This is because of the body’s inability to convert phenylalanine to tyrosine.
Tyrosine is an important amino acid which helps in the production of neurotransmitters which ensures proper functioning of the brain cells.
Purpose. A clear liquid diet is often used before tests, procedures or surgeries that require no food in his stomach or intestines, such as before colonoscopy. It may also be recommended as a short-term diet if he has certain digestive problems, such as nausea, vomiting or diarrhea, or after certain types of surgery ...
Answer:
Everyone, everyday uses geometry in one form or another. In the field of medicine, geometry helps doctors figure out how to solve certain medical conditions.
Explanation:
