Answer:
When studying the human body, student may experience the following difficulties:
- Learning while keeping up (This is a hard topic to learn at school)
- Maturity (Some words and phrases may innapropriate and reactions would be immature)
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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: a. periodontal ligaments
Explanation:
The periodontal ligament is a bundle of tiny fibers which facilitates the attachment of the cementum of the tooth to the jaw bone. This aids in holding the tooth firmly in it's place that is the socket. Thus it can be said that the periodontal ligament provides the supportive function to the tooth.
High-fructose corn syrup, sorbitol and sucrose are the nutritive sweeteners.
Nutritive sweeteners, conjointly referred to as caloric sweeteners or sugars, give energy within the style of carbohydrates. Non-nutritive sweeteners, conjointly known as sugar substitutes or artificial sweeteners, are alternatives that contain zero or terribly low amounts of carbohydrates or energy.
Sorbitol is a form of carbohydrate known as a sugar alcohol, or polyol. Sorbitol contains regarding third fewer calories than sugar and is sixty % as sweet. Sorbitol occurs naturally in a very sort of berries and fruits (e.g., apples and blackberries).
Ingestion an excessive amount of high-fructose corn syrup may promote weight gain, and neither sweetener has any wholesome worth on the far side the calories.
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