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Which of the following describe active transport or is an example of transport of a substance across a membrane? Choose all correct answ Glucose transport into intestinal epithelial cells. Glucose transport into muscle cells Nation pumping out and K+ ion pumping into the cell Transport requires a mediator Requires input of energy for transport Movement of ligand against the concentration gradient

Which of the following describe active transport or is an example of transport of a substance across a membrane? Choose all correct answ Glucose transport into intestinal epithelial cells. Glucose transport into muscle cells Nation pumping out and K+ ion pumping into the cell Transport requires a mediator Requires input of energy for transport Movement of ligand against the concentration gradient

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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**Active Transport in Cellular Biology** Active transport is a fundamental biological process through which cells move substances across their membranes against a concentration gradient, utilizing energy usually derived from ATP. Below are some statements related to active transport. Select all that apply as correct examples or descriptions of active transport. 1. ☑ **Glucose transport into intestinal epithelial cells** 2. ☑ **Glucose transport into muscle cells** 3. ☐ **Na⁺ ion pumping out and K⁺ ion pumping into the cell** 4. ☑ **Transport requires a mediator** 5. ☑ **Requires input of energy for transport** 6. ☑ **Movement of ligand against the concentration gradient** **Key Descriptions:** - **Glucose transport into intestinal epithelial cells**: This involves the active uptake of glucose from the gut into the cells lining the intestine, a process that is crucial for nutrient absorption. - **Glucose transport into muscle cells**: Glucose is actively transported into muscle cells to be used for energy, especially during periods of high energy demand such as exercise. - **Na⁺/K⁺ ion pumps**: Although not indicated as correct in this particular instance, active transport includes mechanisms like the sodium-potassium pump, which maintains cellular ion balance by moving sodium ions out and potassium ions into cells against their respective concentration gradients. - **Transport requiring a mediator**: Active transport processes often involve specific carrier proteins or enzymes that facilitate the movement of substances. - **Energy input**: Unlike passive transport, active transport requires energy input, usually in the form of ATP, to move substances against their natural flow. - **Movement against the concentration gradient**: Active transport is characterized by the movement of molecules or ions from a region of lower concentration to a region of higher concentration, opposing the natural diffusion direction. Understanding active transport is crucial for appreciating how cells maintain homeostasis and regulate various physiological processes.
Transcribed Image Text:**Active Transport in Cellular Biology** Active transport is a fundamental biological process through which cells move substances across their membranes against a concentration gradient, utilizing energy usually derived from ATP. Below are some statements related to active transport. Select all that apply as correct examples or descriptions of active transport. 1. ☑ **Glucose transport into intestinal epithelial cells** 2. ☑ **Glucose transport into muscle cells** 3. ☐ **Na⁺ ion pumping out and K⁺ ion pumping into the cell** 4. ☑ **Transport requires a mediator** 5. ☑ **Requires input of energy for transport** 6. ☑ **Movement of ligand against the concentration gradient** **Key Descriptions:** - **Glucose transport into intestinal epithelial cells**: This involves the active uptake of glucose from the gut into the cells lining the intestine, a process that is crucial for nutrient absorption. - **Glucose transport into muscle cells**: Glucose is actively transported into muscle cells to be used for energy, especially during periods of high energy demand such as exercise. - **Na⁺/K⁺ ion pumps**: Although not indicated as correct in this particular instance, active transport includes mechanisms like the sodium-potassium pump, which maintains cellular ion balance by moving sodium ions out and potassium ions into cells against their respective concentration gradients. - **Transport requiring a mediator**: Active transport processes often involve specific carrier proteins or enzymes that facilitate the movement of substances. - **Energy input**: Unlike passive transport, active transport requires energy input, usually in the form of ATP, to move substances against their natural flow. - **Movement against the concentration gradient**: Active transport is characterized by the movement of molecules or ions from a region of lower concentration to a region of higher concentration, opposing the natural diffusion direction. Understanding active transport is crucial for appreciating how cells maintain homeostasis and regulate various physiological processes.
**Educational Content: Lipids in Human Biology** --- **Match the definition with the term. Use each term only once and some may not be used at all.** 1. **The _______ are the major lipid components of the cell membrane.** Options: - Triacylglycerols - Glycerophospholipids - Sphingomyelin - Vitamin D - Phosphatidylserine **Answer: Glycerophospholipids** 2. **_______ are the fats and oils that constitute the lipids of the human diet.** Options: - Triacylglycerols - Glycerophospholipids - Sphingomyelin - Vitamin D - Phosphatidylserine **Answer: Triacylglycerols** 3. **A glycerophospholipid in which the C1 substituent is linked as an ether rather than an ester is called a _______.** Options: - Triacylglycerols - Glycerophospholipids - Sphingomyelin - Vitamin D - Phosphatidylserine **Answer: Sphingomyelin** 4. **A steroid-derived hormone, _______, regulates Ca2+ metabolism.** Options: - Triacylglycerols - Glycerophospholipids - Sphingomyelin - Vitamin D - Phosphatidylserine **Answer: Vitamin D** --- This educational exercise helps reinforce the understanding of various lipids and their roles in human biology. Each term has a specific function or characteristic that is crucial for maintaining the normal physiological processes of the body.
Transcribed Image Text:**Educational Content: Lipids in Human Biology** --- **Match the definition with the term. Use each term only once and some may not be used at all.** 1. **The _______ are the major lipid components of the cell membrane.** Options: - Triacylglycerols - Glycerophospholipids - Sphingomyelin - Vitamin D - Phosphatidylserine **Answer: Glycerophospholipids** 2. **_______ are the fats and oils that constitute the lipids of the human diet.** Options: - Triacylglycerols - Glycerophospholipids - Sphingomyelin - Vitamin D - Phosphatidylserine **Answer: Triacylglycerols** 3. **A glycerophospholipid in which the C1 substituent is linked as an ether rather than an ester is called a _______.** Options: - Triacylglycerols - Glycerophospholipids - Sphingomyelin - Vitamin D - Phosphatidylserine **Answer: Sphingomyelin** 4. **A steroid-derived hormone, _______, regulates Ca2+ metabolism.** Options: - Triacylglycerols - Glycerophospholipids - Sphingomyelin - Vitamin D - Phosphatidylserine **Answer: Vitamin D** --- This educational exercise helps reinforce the understanding of various lipids and their roles in human biology. Each term has a specific function or characteristic that is crucial for maintaining the normal physiological processes of the body.
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