which or the tonowing organisms has an open circutatory system AND a neart? O Sp
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which or the tonowing organisms has an open circutatory system AND a neart? O Sponges ? Cnidarians Insects O Vertebrates Question 6 10 pts As other endotherms, mammals have a great demand for axygen to sustain their higher metabolic rate. Mammalian lungs are packed with millions of tiny sacs clustered like grapes called alveoli. Which aspect of Fick's law did mammals optimize by having multiple alveoli? O How many cells make up the respiratory organ O The location of the respiratory tissue in the organism The distance between the two sides of gas exchange The difference in concentration gradient of the gas The area along which diffusion can occurExplanation / Answer
Answers:-
5:- Insects.
Because insects has heart and open circulatory system in which hemolymph is not restricted to flow through vessels. It flow freely within the body cavities and make direct contact with all internal tissues and organs.
6:- The difference in concentration gradient of the gas.
Fick's law state that the net diffusion rate of a gas accros a permeable membrane is directly proportional to the surface area of the membrane, partial pressure gradient of the gas accros the membrane and inversely proportional to the thickness of the membrane. Partial pressure gradient of the gas is the difference between concentration gradient of the gas. So 4th option is correct option.
7:- Fish - single-loop circulation, blood passes through heart ones before going to tissues.
Amphibians - double-loop circulation, blood passes through the heart twice but mixes with deoxygenated blood returning from the tissues. Beacuse they have 3 chambered heart.
Mammals - double-loop circulation, complete separation of oxygenated and deoxygenated blood.
8:- Complement
Complement is humoral immunity because it is found in extra cellular body fluids as complement protein and enhance the ability of antibodies and phagocytotic cells to remove microbes and pathogens. It is also a part of innate immune system which activate the complement cascade to identify bacteria or microbes to remove them.
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