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Questions and Answers
What type of signals are sent from the cerebral cortex to nerves associated with specific skeletal muscles?
What type of signals are sent from the cerebral cortex to nerves associated with specific skeletal muscles?
- Optic signals
- Chemical signals
- Motor signals
- Somatic signals (correct)
Where does muscle contraction begin?
Where does muscle contraction begin?
- In the spinal nerves
- In the brain (correct)
- At the muscle fiber membrane
- At the neuromuscular junction
What is the name of the place where the motor neuron reaches a muscle cell?
What is the name of the place where the motor neuron reaches a muscle cell?
- Neuromuscular junction (correct)
- Synapse
- Axon terminal
- Myofibril
Which neurotransmitter binds to receptors on the outside of the muscle fiber to initiate muscle contraction?
Which neurotransmitter binds to receptors on the outside of the muscle fiber to initiate muscle contraction?
What happens within the muscle fiber when acetylcholine binds to receptors on its membrane?
What happens within the muscle fiber when acetylcholine binds to receptors on its membrane?
What type of nerve cell carries the action potential from the nervous system to the muscle fiber?
What type of nerve cell carries the action potential from the nervous system to the muscle fiber?
What is the name of the place where the motor neuron reaches a muscle cell?
What is the name of the place where the motor neuron reaches a muscle cell?
What initiates muscle contraction in response to the nervous system signal?
What initiates muscle contraction in response to the nervous system signal?
Which type of nerve cell is responsible for carrying signals from the cerebral cortex to nerves associated with specific skeletal muscles?
Which type of nerve cell is responsible for carrying signals from the cerebral cortex to nerves associated with specific skeletal muscles?
Which neurotransmitter is released by the motor neuron at the neuromuscular junction?
Which neurotransmitter is released by the motor neuron at the neuromuscular junction?
What type of signal travels through spinal nerves to connect with nerves innervating skeletal muscles throughout the body?
What type of signal travels through spinal nerves to connect with nerves innervating skeletal muscles throughout the body?
Which proteins inside muscle fibers interact with each other during muscle contraction?
Which proteins inside muscle fibers interact with each other during muscle contraction?
What is the first step in the process that contracts a relaxed muscle fiber?
What is the first step in the process that contracts a relaxed muscle fiber?
Which part of the nerve cell sends electronic signals to a motor neuron?
Which part of the nerve cell sends electronic signals to a motor neuron?
What causes the reorganization of proteins inside muscle fibers during contraction?
What causes the reorganization of proteins inside muscle fibers during contraction?
What does a multistep molecular process within the muscle fiber initiate?
What does a multistep molecular process within the muscle fiber initiate?
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