**Acetylcholine and Ion Channels**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 _______________________.**Options:**- O voltage-gated; leaky- O ligand-gated; voltage-gated- O symporter; antiporter- O None of the above. **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.

Answered: Acetylcholine is a neurotransmitter…

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

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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**Acetylcholine and Ion Channels**

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 _______________________.

**Options:**

- O voltage-gated; leaky
- O ligand-gated; voltage-gated
- O symporter; antiporter
- O None of the above.

Expert Solution

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Introduction:- Neurotransmitters are the chemical signalling molecules which helps in the communication between the two nerve cells or between a nerve cell and a muscle cell. Neurotransmitters are released by nerve cells and are of various types like acetylcholine, dopamine, serotonin and GABA. These chemical molecules acts as ligand and bind to their specific receptors on the target cells to trigger the specific response.

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