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Biology Questions & Answers - BIOL 0501

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Thompson Rivers University

   

General Biology (BIOL 0501)

   

Added on  2020-03-02

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BIOL 0501 - The following document is based on biology subject question answer. The assignment is surrounded with human body question answers. Some questions are like : digestive system parts, there are some mcq questions too on the topics like salivary gland, oseophagus, large intestine etc.

Biology Questions & Answers - BIOL 0501

   

Thompson Rivers University

   

General Biology (BIOL 0501)

   Added on 2020-03-02

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BIOLOGY QUESTIONS AND ANSWERS1Biology QuestionsNameName of the ClassInstructorInstitutionCity and StateDate
Biology Questions & Answers - BIOL 0501_1
BIOLOGY QUESTIONS AND ANSWERS2SECTION 1The digestive systemLabelName of part of the digestive systema)Mouthb)Liver c)Duodenumd)Appendixe)Parotid glandf)Pharynxg)Esophagush)Stomach i)Descending colonj)Small intestinek)Rectuml)Anusm)Transverse colonn)Ascending colono)Tonguep)Gallbladderq)PancreasQ1.The salivary glands secrete saliva which contains mucus, amylase, water and lysozymes.Q2.The esophagus is adapted to its function because it is a muscular tube help open with rings of cartilage.Q3.The stomach is adapted to its function because it has 3 layers of muscle. Food is contained in the stomach by circular muscle rings such as pyloric and the esophageal sphincter. The latter keeps both acid and food from sloshing into the esophagus whereas the lower part of the stomach from the upper ileum (pyloric sphincter) regulates the passage of food into the ileum or small intestine.
Biology Questions & Answers - BIOL 0501_2
BIOLOGY QUESTIONS AND ANSWERS3Q4. Almost all digestion takes place in the duodenum since it is a muscular tube which is the site of action for pancreatic enzymes.Q5. The ileum is the site for final digestion because it is a muscular tube with lots of villi andmembrane bound enzymes. The small intestine has three section ileum, jejunum and duodenum. The mucous membrane of the inner part of jejunum contains villi which help in absorption of nutrients. Another key reason why ileum is the final stage of digestion is that it contains digestive enzymes that break down the undigested food materials into liquid form.Q6. The internal S.A of the ileum is greatly increased because of the presence of the folds in the mucosa, villi, and microvilli.Q7. The large intestine is adapted to its function because it is big. The rationale behind this isthat large intestine is where water is absorbed from the indigestible matter and transmitted outside the body as faeces.Q8. The molar teeth are adapted to their function of grinding food because they are ridged with 4 to 5 cusps SECTION 21. Peristalsis is the pattern of muscle contractions that push food distally along the tract.Themovement involves relaxation and contraction of smooth muscles behind the chewed food toprevent it from going backwards and longitudinal contraction to force it move forward.2. The precise role circular and longitudinal muscles during peristalsis.Food materials are moved through the digestive system through peristalsis movement. During the process, a set of muscles in the gut wall are used. They include longitudinal and circular muscles. Circular muscles help to decrease the gut’s diameter the moment they contract while longitudinal muscles help to reduce the size of the gut the moment they contract (Bosman et al., 2010). Most importantly, the muscles work hand in hand to produce a wave like contraction. This creates a squeezed action that forces the bolus via the gut. Peristalsis then continues to move food materials through the small intestine as well as the large intestine.
Biology Questions & Answers - BIOL 0501_3

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