Question

In: Biology

1. The main function of the small intestine is nutrient absorption. Which of the following structural...

1. The main function of the small intestine is nutrient absorption. Which of the following structural qualities of the intestine increase absorption? Select all that apply.

a. Very long tube of almost 6 meters in length when relaxed.

b. Internal wall covered with fingerlike projections.

c. Cell membrane of epithelial cells with multiple foldings.

d. Higher pH than in the stomach in part by secretion of bicarbonate.

-------------------------

1. What are the advantages of an open circulatory system? Select all that apply.

a. Blood moves at high pressure to the tissues.

b. It can circulate large amounts of oxygen rapidly.

c. It is energy efficient.

d. It can be used for other purposes, such as movement.

e. Oxygenated and deoxygenated blood never mix.

Solutions

Expert Solution

Small intestines are about 20 foot long which is approximately 6 metres. The internal walls of small intestine have finger lije projections known as vili. The vili also contains microvili which helps in increasing the area of adsorption. The epithelial cells of small intestine contains foldings which slows down the movement of food so that maximum absorption can be attained. The pH of food is higher than the stomach because of bicarbonate ions. The lower pH inside the stomach could damage the inner lining if intestines resulting in poor absorption.

So all options are correct.

2. An open circulatory system is present in lower invertebrates where the size of body is smaller and the metabolism rate is low. The open circulatory system pumps the blood directly into the bidy cavity. This type of pumping is very liw in pressure and carries oxygen in very less amount. So we can say that it is energy efficient.

The oxygenated and deoxygenated blood never mix in a clised circulatory system with four chambered heart.

So the only option correct is c.


Related Solutions

1)How the absorption of nutrients is affected if food moved through the small intestine at a...
1)How the absorption of nutrients is affected if food moved through the small intestine at a faster rate? 2)Cholecystectomy is the surgical removal of the gallbladder. It is a common treatment of gallstones that cause obstruction of bile flow from the gallbladder into the duodenum. a) Explain why taking vitamin supplements would be required in such case. b) List the affected vitamins. c) What adjustments to their daily routine might they have to perform in order to accommodate their loss?...
Describe the structure and function of the layers of the small intestine.
Describe the structure and function of the layers of the small intestine.
Compare the DIGESTION of carbohydrates, fats and proteins in the small intestine, and the ABSORPTION  of carbohydrates,...
Compare the DIGESTION of carbohydrates, fats and proteins in the small intestine, and the ABSORPTION  of carbohydrates, fats and proteins in the small intestine.
Describe absorption of nutrients in the small intestine. What is the nature of the absorbed compounds...
Describe absorption of nutrients in the small intestine. What is the nature of the absorbed compounds (how do they differ from the starting materials), how are they absorbed and what is their destination?
4.) Describe the functional structure of the small intestine for absorption? Draw and label the parts.
4.) Describe the functional structure of the small intestine for absorption? Draw and label the parts.
A patient has a disruption of bile function. What nutrient absorption will be affected the most?...
A patient has a disruption of bile function. What nutrient absorption will be affected the most? A) Electrolytes such as sodium and potassium B) Vitamins A, D, E, and K C) Vitamins B and C D) Calcium
Please Answer all 4 Questions: 1) Compare the functions of the small intestine and large intestine...
Please Answer all 4 Questions: 1) Compare the functions of the small intestine and large intestine and suggest a reason the small intestine is so much longer than the large intestine? 2) Review the location of the parotid gland and explain why a person who has mumps will probably experience pain while eating? 3) If the gallbladder is surgically removed, what functions(s) will no longer be possible? How will this surgery affect the transport bile ? 4) Why do you...
Which of the following is not a main function of the entrepreneur? to assume the risk...
Which of the following is not a main function of the entrepreneur? to assume the risk of economic losses to make strategic business decisions to innovate to make routine pricing decisions
Virus structure and function a.What are the main structural components of a virus? b.What does it...
Virus structure and function a.What are the main structural components of a virus? b.What does it mean to say that a virus shows host specificity (host range)? c.What structural feature(s) help with host specificity?
QUESTION 1 Most of the water and inorganic ions are absorbed by the: large intestine. small...
QUESTION 1 Most of the water and inorganic ions are absorbed by the: large intestine. small intestine. stomach. large and small intestines. large intestine, small intestine, and stomach. QUESTION 2 In order to transport __________ into the bloodstream from the small intestine, a ________ is established in the epithelial cells lining the small intestine. ions; glucose acetyl-coA; calcium glucose; sodium sodium; glucose
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT