The basic sequence of events taking place at the neuromuscular junction. Introduction: The nervous system controls the skeletal muscle fiber contraction. It controls the muscle fiber at the neuromuscular junction (NMJ), which is a specialized intracellular connection situated midway along the length of the muscle fiber.

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Answer 1

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Chapter 6, Problem 1CRQ

Summary Introduction

To describe: The basic sequence of events taking place at the neuromuscular junction.

Introduction: The nervous system controls the skeletal muscle fiber contraction. It controls the muscle fiber at the neuromuscular junction (NMJ), which is a specialized intracellular connection situated midway along the length of the muscle fiber.

Expert Solution & Answer

Explanation of Solution

The sequence of events taking place at a neuromuscular junction:

The motor neuron presents at the neuromuscular junction’s release acetylcholine (ACh) that alters the permeability of the plasma membrane.
This change permits the entry of positive charges. This in turn generates an action potential or electrical impulse in the sarcolemma.
The action potential or electrical impulse spreads across the muscle fiber’s surface and also into the interior along the transverse or T tubules.
The calcium ion (which are released from the sarcoplasmic reticulum) concentration in the cytoplasm increases, which in turns triggers the muscle fiber contraction.
The acetylcholinesterase (AChE) removes the ACh from motor end plate and synaptic cleft and as a result, the contraction ends.

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Question #3: In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming there was just one gene conferring gametophytic obligate apomixis, and that the two parents are inbreds, what would be the consequences of such a cross if: a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the parental cross. b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non- apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female first (left side) in the…

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Answer 2

Question

Chapter 6, Problem 1CRQ

Summary Introduction

To describe: The basic sequence of events taking place at the neuromuscular junction.

Introduction: The nervous system controls the skeletal muscle fiber contraction. It controls the muscle fiber at the neuromuscular junction (NMJ), which is a specialized intracellular connection situated midway along the length of the muscle fiber.

Expert Solution & Answer

Explanation of Solution

The sequence of events taking place at a neuromuscular junction:

The motor neuron presents at the neuromuscular junction’s release acetylcholine (ACh) that alters the permeability of the plasma membrane.
This change permits the entry of positive charges. This in turn generates an action potential or electrical impulse in the sarcolemma.
The action potential or electrical impulse spreads across the muscle fiber’s surface and also into the interior along the transverse or T tubules.
The calcium ion (which are released from the sarcoplasmic reticulum) concentration in the cytoplasm increases, which in turns triggers the muscle fiber contraction.
The acetylcholinesterase (AChE) removes the ACh from motor end plate and synaptic cleft and as a result, the contraction ends.

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Answer 3

Question

Chapter 6, Problem 1CRQ

Summary Introduction

To describe: The basic sequence of events taking place at the neuromuscular junction.

Introduction: The nervous system controls the skeletal muscle fiber contraction. It controls the muscle fiber at the neuromuscular junction (NMJ), which is a specialized intracellular connection situated midway along the length of the muscle fiber.

Expert Solution & Answer

Explanation of Solution

The sequence of events taking place at a neuromuscular junction:

The motor neuron presents at the neuromuscular junction’s release acetylcholine (ACh) that alters the permeability of the plasma membrane.
This change permits the entry of positive charges. This in turn generates an action potential or electrical impulse in the sarcolemma.
The action potential or electrical impulse spreads across the muscle fiber’s surface and also into the interior along the transverse or T tubules.
The calcium ion (which are released from the sarcoplasmic reticulum) concentration in the cytoplasm increases, which in turns triggers the muscle fiber contraction.
The acetylcholinesterase (AChE) removes the ACh from motor end plate and synaptic cleft and as a result, the contraction ends.

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Answer 4

Question

Chapter 6, Problem 1CRQ

Summary Introduction

To describe: The basic sequence of events taking place at the neuromuscular junction.

Introduction: The nervous system controls the skeletal muscle fiber contraction. It controls the muscle fiber at the neuromuscular junction (NMJ), which is a specialized intracellular connection situated midway along the length of the muscle fiber.

Expert Solution & Answer

Explanation of Solution

The sequence of events taking place at a neuromuscular junction:

The motor neuron presents at the neuromuscular junction’s release acetylcholine (ACh) that alters the permeability of the plasma membrane.
This change permits the entry of positive charges. This in turn generates an action potential or electrical impulse in the sarcolemma.
The action potential or electrical impulse spreads across the muscle fiber’s surface and also into the interior along the transverse or T tubules.
The calcium ion (which are released from the sarcoplasmic reticulum) concentration in the cytoplasm increases, which in turns triggers the muscle fiber contraction.
The acetylcholinesterase (AChE) removes the ACh from motor end plate and synaptic cleft and as a result, the contraction ends.

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Answer 5

Chapter 6, Problem 1CRQ

Summary Introduction

To describe: The basic sequence of events taking place at the neuromuscular junction.

Introduction: The nervous system controls the skeletal muscle fiber contraction. It controls the muscle fiber at the neuromuscular junction (NMJ), which is a specialized intracellular connection situated midway along the length of the muscle fiber.

Expert Solution & Answer

Explanation of Solution

The sequence of events taking place at a neuromuscular junction:

The motor neuron presents at the neuromuscular junction’s release acetylcholine (ACh) that alters the permeability of the plasma membrane.
This change permits the entry of positive charges. This in turn generates an action potential or electrical impulse in the sarcolemma.
The action potential or electrical impulse spreads across the muscle fiber’s surface and also into the interior along the transverse or T tubules.
The calcium ion (which are released from the sarcoplasmic reticulum) concentration in the cytoplasm increases, which in turns triggers the muscle fiber contraction.
The acetylcholinesterase (AChE) removes the ACh from motor end plate and synaptic cleft and as a result, the contraction ends.

Answer 6

Chapter 6, Problem 1CRQ

Summary Introduction

To describe: The basic sequence of events taking place at the neuromuscular junction.

Introduction: The nervous system controls the skeletal muscle fiber contraction. It controls the muscle fiber at the neuromuscular junction (NMJ), which is a specialized intracellular connection situated midway along the length of the muscle fiber.

Expert Solution & Answer

Explanation of Solution

The sequence of events taking place at a neuromuscular junction:

The motor neuron presents at the neuromuscular junction’s release acetylcholine (ACh) that alters the permeability of the plasma membrane.
This change permits the entry of positive charges. This in turn generates an action potential or electrical impulse in the sarcolemma.
The action potential or electrical impulse spreads across the muscle fiber’s surface and also into the interior along the transverse or T tubules.
The calcium ion (which are released from the sarcoplasmic reticulum) concentration in the cytoplasm increases, which in turns triggers the muscle fiber contraction.
The acetylcholinesterase (AChE) removes the ACh from motor end plate and synaptic cleft and as a result, the contraction ends.

Answer 7

Chapter 6, Problem 1CRQ

Summary Introduction

To describe: The basic sequence of events taking place at the neuromuscular junction.

Introduction: The nervous system controls the skeletal muscle fiber contraction. It controls the muscle fiber at the neuromuscular junction (NMJ), which is a specialized intracellular connection situated midway along the length of the muscle fiber.

Answer 8

Expert Solution & Answer

Explanation of Solution

The sequence of events taking place at a neuromuscular junction:

The motor neuron presents at the neuromuscular junction’s release acetylcholine (ACh) that alters the permeability of the plasma membrane.
This change permits the entry of positive charges. This in turn generates an action potential or electrical impulse in the sarcolemma.
The action potential or electrical impulse spreads across the muscle fiber’s surface and also into the interior along the transverse or T tubules.
The calcium ion (which are released from the sarcoplasmic reticulum) concentration in the cytoplasm increases, which in turns triggers the muscle fiber contraction.
The acetylcholinesterase (AChE) removes the ACh from motor end plate and synaptic cleft and as a result, the contraction ends.