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Why does selective blocking of inhibitory synapses lead to muscle spasms?
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Binding of the neurotransmitters with muscle membrane to become permeable to sodium and sodium ions is?
synapses
How many synapses are crossed in a single reflex arc during a muscle stretch reflex?
one
Can a single motor neuron for synapses with just one muscle cell?
A single motor neuron will innervate many muscle cells
Why reflexes are brisk in UMN lesion?
The CNS has INHIBITORY effects on muscles. Loss of this inhibition from an UMN lesion leads to increased muscle activity (spastic paralysis and a + babinski).
What is the job of a leg muscle cell?
Receive stimulatory impulses to contract and inhibitory impulses to stop contraction from the neuromuscular junction. This contraction is carried out by Ca2+, ATP and the actin and myosin proteins in the cells, forming a sarcomere. By contracting and relaxing as a syncytium, the leg muscle can control the joint(s) it crosses and produce movement.
The venom of the black widow spider causes violent muscle contractions by flooding synapses with?
It floods the synapses with Acetycholine or ACh.
What sends messages to your brain and spinal cord and muscle cells?
Synapses let the "message" travel to muscle cells.
Binding of the neurotransmitters with muscle membrane to become permeable to sodium and sodium ions is?
synapses
How many synapses are crossed in a single reflex arc during a muscle stretch reflex?
one
Can a single motor neuron for synapses with just one muscle cell?
A single motor neuron will innervate many muscle cells
The Golgi tendon organ GTO muscle spindle and Pacinian corpuscles make up the three primary?
Inhibitory proprioceptors
Are beta blockers blood thinners?
No, they are drugs that counteract the effect of catecholamines between synapses and suppress inotropic effect of the heart muscle
Just what does pass from neuron to the muscle cells?
via chemicals called neurotransmitters, expressed at sites called synapses, which are tiny gaps between a neuron and another neuron or a muscle cell.
Is damage to the heart muscle caused by a thrombus blocking a coronary artery?
Coronary Thrombosis
Is the damage to the heart muscle caused by a thrombus blocking a coronary artery?
Coronary Thrombosis
What is the stimulus for the knee jerk reflex?
Striking the patellar tendon with a tendon hammer just below the patella stretches the muscle spindle in the quadriceps femoris muscle. This produces a signal which travels back to the spinal cord and synapses (without interneurons) at the level of L4 in the spinal cord, completely independent of higher centres. From there, an alpha-motor neuron conducts an efferent impulse back to the quadriceps femoris muscle, triggering contraction. This contraction, coordinated with the relaxation of the antagonistic flexor hamstring muscle causes the leg to kick. This reflex is a reflex of proprioception which helps maintain posture and balance, allowing to keep one's balance with little effort or conscious thought.The patellar reflex is a clinical and classic example of the monosynaptic reflex arc. There is no interneuron in the pathway leading to contraction of the quadriceps muscle. Instead the bipolar sensory neuron synapses directly on a motor neuron in the spinal cord. However, there is an inhibitory interneuron used to relax the antagonistic hamstring muscle.
What does the neuromuscular junction connect to?
The nervous system and the muscular system are connected by the neuromuscular junction. The connection is done with synapses between nerve and muscle fibers.
