|The three hormones that are produced by the thyroid gland are thyroxine (T4), triiodothronine (T3) and calcitonin.|…
The exam has been prepared in careful alignment with the core textbook for BC Grade 12…
1) The layer of the GI tract wall that is responsible for motility is the…
100-Name 4 different types of respiratory surfaces for organisms with examples Skin-frogs Gills-Fish (also skin) Tracheae-Insects (tracheal tubes directly feed body tissues across cell membranes, separate from circulatory system) Lungs-Humans (other mammals)-exchange of gases 200-1, Air rushes into the lungs of humans during inhalation because A) the rib muscles and diaphragm contract, increasing the lung volume. B) pressure in the alveoli increases. C) gas flows from a region of lower pressure to a region of higher pressure. D) pulmonary muscles contract and pull on the outer surface of the lungs. E) a positive respiratory pressure is created when the diaphragm relaxes.…
B7 (Biotin): Depression, lack of intestinal absorption, inflamed bowel syndrome, skin irritation, hair loss, poor muscle control, seizures, development delayed…
10. Once ATP is converted into ADP + P, it must be ____. b) recharged by chemiosmosis…
1) Produces the hormones that promote the development of the female secondary sexual characteristics at puberty.…
It adds complimentary ribonucleotides and a promoter is the base sequence in the DNA that signals the start of a gene.…
A cyclist rides her bike up a very steep hill. Which choice below properly describes this example in energetic terms? Both a) and d) are correct.…
The cardiovascular system consists of the heart, blood and blood vessels. The cardiovascular system is the major transport of materials to and from the cells. Blood is carried from the heart around the body via the arteries and the blood is then carried back to the heart via the veins. The capillaries connect the arteries to the veins; the function of the capillaries is too supply the cells with nutrients and oxygen. The cardiovascular system is responsible for the transport of oxygenated blood around the body. It will transport these to the cells and collect the deoxygenated blood which is ready for the excretion from the cells. The cardiovascular system will deliver the nutrients oxygen and glucose via the blood stream. Oxygen is need for aerobic respiration to occur.…
The myocardium, commonly referred to as the heart, acts as a pump for transporting blood around the body via a collective system, known as the cardiovascular system. This system has various components; blood vessels; mainly arteries, veins and capillaries. The cardiovascular system has four main functions within the body. Firstly to transport dissolved oxygen, hormones, nutrients, salts, enzymes and urea to cells located around various places within the body, whilst at the same time eliminating any waste products such as carbon dioxide and water. Secondly, to protect the body from infection and blood loss. Thirdly, to distribute heat around the body to enable a healthy temperature of 37oc and finally to aid the body to maintain fluid balance. This ‘human pump’ can be regarded as two pumps. The fist sized organ contains two muscular chambers; the upper chamber; the atrium and the lower; the ventricle. The right side of the heart pumps deoxygenated blood from the veins to the lungs for oxygenation, whilst the left side pumps oxygenated blood from the lungs to the body. It is important to note that the two sides are separated by a septum. The blood flows through the heart twice within one cycle, this is known as ‘double circulation’.…
2.1 identify the major stages in the evolution of living things, including the formation of:…
The maintenance of a stable equilibrium in a biological system that opposes external or internal disturbances.…
12. What causes different cells in the body to look and function differently from each other/?…
The cardiovascular system, also known as the circulatory system, is composed of the heart, blood vessels, and blood. The term cardiovascular refers to the heart (cardio-) and blood vessels (vascular). The term circulatory refers to the circulation of the blood. The heart is a muscular pump and its regular contractions send blood into tough, elastic tubes called arteries, which branch into smaller vessels and convey oxygen-rich blood through the body. The arteries eventually divide into tiny capillaries, which have such thin walls, that oxygen, nutrients, minerals, and other substances pass through to surrounding cells and tissues. Waste substances flow from the tissues and cells into the blood for disposal. The capillaries join and enlarge to create tubes that eventually become veins, which take blood back to the heart. Vessels carrying oxygenated blood (usually arteries) are shown in red and those carrying deoxygenated blood (usually veins) are blue.…