16 Questions
What type of signals are sent from the cerebral cortex to nerves associated with specific skeletal muscles?
Somatic signals
Where does muscle contraction begin?
In the brain
What is the name of the place where the motor neuron reaches a muscle cell?
Neuromuscular junction
Which neurotransmitter binds to receptors on the outside of the muscle fiber to initiate muscle contraction?
Acetylcholine
What happens within the muscle fiber when acetylcholine binds to receptors on its membrane?
Proteins reorganize to shorten and relax
What type of nerve cell carries the action potential from the nervous system to the muscle fiber?
Motor neuron
What is the name of the place where the motor neuron reaches a muscle cell?
Neuromuscular junction
What initiates muscle contraction in response to the nervous system signal?
Action potential
Which type of nerve cell is responsible for carrying signals from the cerebral cortex to nerves associated with specific skeletal muscles?
Motor neuron
Which neurotransmitter is released by the motor neuron at the neuromuscular junction?
Acetylcholine
What type of signal travels through spinal nerves to connect with nerves innervating skeletal muscles throughout the body?
Somatic signal
Which proteins inside muscle fibers interact with each other during muscle contraction?
Actin and myosin
What is the first step in the process that contracts a relaxed muscle fiber?
Binding of acetylcholine to receptors
Which part of the nerve cell sends electronic signals to a motor neuron?
Axon
What causes the reorganization of proteins inside muscle fibers during contraction?
Interaction of actin and myosin
What does a multistep molecular process within the muscle fiber initiate?
Contraction and relaxation
Learn about how skeletal muscles move with the collaboration of the muscular system and the nervous system. Discover how signals are sent from the cerebral cortex to specific skeletal muscles, leading to muscle contraction through action potentials.
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