- A 35 Year Old Woman Presents With Fatigue And Weakness Affecting Mainly Her Upper Limbs As Well As Double Vision She Wa 1 (135.18 KiB) Viewed 157 times
A 35 year old woman presents with fatigue and weakness affecting mainly her upper limbs as well as double vision and difficulty swallowing. She was diagnosed with myasthenia gravis (MG). Myasthenia Gravis (MG) is a neurological condition involving dysfunction at the neuromuscular junction. MG is caused when the body inappropriately produces antibodies against our own self, and they block or destroy the receptors that would normally be responsible for muscle activation. What would be a consequence of the receptors being blocked or destroyed? Select 4 correct answer(s) The threshold is not reached and action potential on postsynaptic membrane does not fire Excitation- contraction coupling does not occur, and skeletal muscle contraction is missing Lack of contraction causes more acetylcholine to be released in order to reach threshold. Acetylcholine is not removed from neuromuscular junction Calcium is released from sarcoplasmic reticulum in response to increased acetylcholine and myosin and actin will overlap and cause contraction The calcium is not released from sarcoplasmic reticulum
A 35 year old woman presents with fatigue and weakness affecting mainly her upper limbs as well as double vision. She was diagnosed with myasthenia gravis (MG). Myasthenia Gravis (MG) is a neurological condition involving dysfunction at the neuromuscular junction. MG is caused when the body inappropriately produces antibodies against our own self, and they block or destroy the receptors that would normally be responsible for muscle activation. Identify which of the following muscles can be affected by MG? (2 answers) Select 2 correct answer(s) heart muscle blood vessel smooth muscle intestine motility adductor oculi biceps brachi
A 35 year old woman presents with fatigue and weakness affecting mainly her upper limbs as well as double vision and difficulty swallowing. She was diagnosed with myasthenia gravis (MG). Myasthenia Gravis (MG) is a neurological condition involving dysfunction at the neuromuscular junction. MG is caused when the body inappropriately produces antibodies against our own self, and they block or destroy the receptors that would normally be responsible for muscle activation. Which of the following receptors are involved in the neuromuscular junction? beta presynaptic membrane receptors alpha postsynaptic membrane receptors muscarinic presynaptic membrane receptors nicotinic postsynaptic membrane receptors