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Which of the following specifically explains why glucose uptake into intestinal cells happens in only one direction. The Na+/Glucose transporter has a binding affinity for both Na+ and Glucose. The Na+/Glucose transporter will only undergo a conformational change when both Na+ and glucose are bound. O Na+ ions are always present at higher concentrations OUTSIDE of the intestinal cells. Na+ ions are always present at higher concentrations INSIDE of the intestinal cells.

Which of the following specifically explains why glucose uptake into intestinal cells happens in only one direction. The Na+/Glucose transporter has a binding affinity for both Na+ and Glucose. The Na+/Glucose transporter will only undergo a conformational change when both Na+ and glucose are bound. O Na+ ions are always present at higher concentrations OUTSIDE of the intestinal cells. Na+ ions are always present at higher concentrations INSIDE of the intestinal cells.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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**Question:** Which of the following specifically explains why glucose uptake into intestinal cells happens in only one direction? **Options:** - ○ The Na+/Glucose transporter has a binding affinity for both Na+ and Glucose. - ● The Na+/Glucose transporter will only undergo a conformational change when both Na+ and glucose are bound. - ○ Na+ ions are always present at higher concentrations OUTSIDE of the intestinal cells. - ○ Na+ ions are always present at higher concentrations INSIDE of the intestinal cells. **Explanation:** The correct answer is indicated by a filled circle (●) next to the option explaining that the Na+/Glucose transporter undergoes a conformational change only when both Na+ and glucose are bound, allowing for the unidirectional uptake of glucose into the intestinal cells.
Transcribed Image Text:**Question:** Which of the following specifically explains why glucose uptake into intestinal cells happens in only one direction? **Options:** - ○ The Na+/Glucose transporter has a binding affinity for both Na+ and Glucose. - ● The Na+/Glucose transporter will only undergo a conformational change when both Na+ and glucose are bound. - ○ Na+ ions are always present at higher concentrations OUTSIDE of the intestinal cells. - ○ Na+ ions are always present at higher concentrations INSIDE of the intestinal cells. **Explanation:** The correct answer is indicated by a filled circle (●) next to the option explaining that the Na+/Glucose transporter undergoes a conformational change only when both Na+ and glucose are bound, allowing for the unidirectional uptake of glucose into the intestinal cells.
Acetylcholine is a neurotransmitter that, when bound to its receptor, causes the receptor to open a channel that allows the flow of Na⁺ ions into neurons. When the Na⁺ ions begin to flow into the neuron, this change in the net charge across the neuronal cell membrane often triggers Ca²⁺ ion channels to open. In this scenario, the acetylcholine receptor would be acting as a _______________ ion channel, and the Ca²⁺ channels would be classified as _______________. - ○ voltage-gated; leaky - ● ligand gated; voltage-gated - ○ symporter; antiporter - ○ None of the above.
Transcribed Image Text:Acetylcholine is a neurotransmitter that, when bound to its receptor, causes the receptor to open a channel that allows the flow of Na⁺ ions into neurons. When the Na⁺ ions begin to flow into the neuron, this change in the net charge across the neuronal cell membrane often triggers Ca²⁺ ion channels to open. In this scenario, the acetylcholine receptor would be acting as a _______________ ion channel, and the Ca²⁺ channels would be classified as _______________. - ○ voltage-gated; leaky - ● ligand gated; voltage-gated - ○ symporter; antiporter - ○ None of the above.
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