THE CELL
TRANSPORT INTO AND OUT OF THE CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Water enters the root hair cells from the soil
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Root hair cells absorb mineral ions from the soil
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Glucose is absorbed into the bloodstream from the gut
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Oxygen enters the red blood cells from the alveoli
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Detailed explanation-1: -Monosaccharide sugars such as galactose, glucose, and fructose are absorbed by active transport across the microvillus membrane of the small intestine into the portal blood system for transport to the liver. Rates of absorption differ between sugars and they mutually interfere with each other’s absorption.
Detailed explanation-2: -There are two types of active transport: primary active transport that uses adenosine triphosphate (ATP), and secondary active transport that uses an electrochemical gradient. Some examples of active transport include: Phagocytosis of bacteria by macrophages. Movement of calcium ions out of cardiac muscle cells.
Detailed explanation-3: -Glucose is transported from the small intestine into the bloodstream via active transport, this requires energy. Glucose moves by diffusion from the small intestine into the bloodstream. Food is digested in the small intestine. There is a higher concentration of glucose in the small intestine than in the bloodstream.
Detailed explanation-4: -Glucose transporter (GLUT) is a facilitative transport protein involved in glucose translocation across the cell membrane.