Welcome to your OCR AS Biology 5 The body structure which protects the lungs from physical harm. Diaphragm Bronchus Rib cage CartilageWhat is the respiratory organ of a mosquito? Book lungs Spiracles and trachea Body surface LungsWhich of the following is not a function of bile salts? Providing colour to faeces. Acting as a buffer. Helping in the absorption of fatty acids and glycerol. Neutralizes the acidity of chyme.What is the first step of expiration? Contraction of abdominal muscles. Relaxation of external intercostal muscles. Relaxation of diaphragm muscles. Air flowing out of the lungs.How does the oxygen move from the lungs into the blood stream? Veins A large artery Small blood vessels Nerve fibresLungs are encased in thin membranes called ________. Rib cage Alveolar duct Pleura DiaphragmAdaptation of some insects to reduce water loss. Exoskeleton Presence of antennae Large surface area to volume ratio Less number of legsSelect the correct statement/s from the following. a) Human heart is a hollow muscular organ. b) It is a major component of human circulatory system. c) It is about the size of it's owner's fist. d) It consists of 2 layers. a, b & c a, c & d a & b only AllWhich of the following statement is correct regarding the location of human heart? It is situated right in front of the sternum. It is situated right beneath the thoracic cavity. It is situated more towards the right side from the midline. It is situated more towards the left side from the midline.Which of the following is not a reason for the evolvement of respiratory surfaces with high AV ratios? Animals became more active. Animals grew big in size. Animals became nocturnal. Animals became complex in structure.What are the 3 layers of a heart? a) Endocardium b) Epicardium c) Pericardium d) Myocardium a, d & b a, d & c c, b & d a, b & cWhat happens when carbon monoxide concentration increases in the blood? Heart rate increases. Blood pressure is increased significanty. Decrease in blood supply to the extremeties of the body. The quantity of oxygen transported in the blood reduces.Select the incorrect statement regarding the system of trachea in insects. It opens to the exterior through spiracles. It is a highly branched tubular system. The air is taken directly upto the cells. Gaseous exchange is not very efficient.Which is not a function performed by the stomach? Release of bile. Secretion of gastric juice. Storage of food temporarily. Secretion of hormone gastrine.Select the correct sequence of steps which shows the movement of oxygen through an insect. a) Spiracle closes. b) Oxygen is delivered directly to respiring tissues. c) Oxygen diffuses through the trachea into the tracheoles. d) Oxygen enters the insect through spiracles and into the trachea. d, a, c, b b, a, c, d d, b, a, c a, d, c, bWhich animal phylum was the first to evolve with special respiratory organs? Phylum annelida Phylum Arthropoda Phylum Mollusca Phylum EchinodermataWindpipe is also known as the _________. Lungs Oesophagus Trachea LarynxHow is Vitamin B12 absorbed into the body? The stomach secretes an intrinsic factor. It is digested by gastric juices. By micelles Vitamin B12 is absorbed into the veins by diffusion.Select the incorrect statement regarding COPD. Over 60 million people worldwide have COPD. COPD occurs when the lungs become inflamed, damaged and narrowed. The WHO predicts that COPD will become the No 1 leading cause of death worldwide by 2030. In older people, recovery from COPD is not possible.What happens to the gases inhaled apart from oxygen? They get absorbed by the digestive system. They are converted to oxygen by the lungs. They are exhaled. They circulate throughout the body and are disposed of later.Time is Up!