A. Very Short Answers Type Questions
1. In which part of alimentary canal is food completely digested ?
2. State the product of respiration in human muscles.
3. What is the function of stomach ?
4. What is the consequence of conversion of pyruvate into lactic acid in muscle cells?
5. Name the process which leads to fermentation in yeast. What are its end products ?
6. How is backflow of blood inside the heart prevented ?
7. Give two features of arteries,
8. Which chamber of heart receives oxygenated blood from pulmonary vein ?
9. In which part of alimentary canal is bile secreted by liver ?
10. Mention the site of gaseous exchange in lungs.
11. Write the sequence of anaerobic reactions in muscles.
Answers
Answer:
1) Small intestine.
2) Carbondioxide and Water.
3) The core function of the human stomach is as an aidto digestion. This is an adaptive process that has had to modify itself many times in human history to adapt to changes in diet, lifestyle and microbiome.
4) Excess pyruvate is converted to lactic acid whichcauses muscle fatigue. Cellular respiration produces further molecules of ATP from pyruvate in the mitochondria. It is also required to resynthesize glycogen from lactic acid and restore stores of phosphocreatine and ATP in the muscle.
5) Alcohol fermentation, also known as ethanol fermentation, is the anaerobic pathway carried out by yeasts in which simple sugars are converted to ethanol and carbon dioxide. The process of alcohol fermentation allows yeasts to break down sugar in the absence of oxygen and results in byproducts that humans benefit from.
6) As the heart pumps blood, a series of valves open and close tightly. These valves ensure that blood flows in only one direction, preventing backflow. The tricuspid valve is situated between the right atrium and right ventricle. The pulmonary valve is between the right ventricle and the pulmonary artery.
7) ● Have thick elastic muscular walls.
● Carry blood to all parts of body.
8) Blood enters the right atrium and passes through the right ventricle. The right ventricle pumps the blood to the lungs where it becomes oxygenated. The oxygenated blood is brought back to the heart by the pulmonary veins which enter the left atrium.
9) The bile is collected from the liver cells by the ducts and either carried to the gallbladder for temporary storage or poured directly into the duodenum through the common bile duct.
10) During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
11) Organisms take glucose, and through the electron transport chain, produce ethanol or lactic acid and CO2, and ATP. ... During this short time, anaerobic respiration is used to make ATP to fuel your muscles as they run.
Explanation:
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