The meningeal branch of a spinal nerve actually renters the
vertebral canal to innervate the meninges and blood vessels. Hiccups
could happen if there was irritation or damage to the motor branches of ventral
rami together with the C3-C5 region of the spinal cord and Irritation<span> of the phrenic nerve may cause diaphragm spasms called hiccups.</span>
Answer:
a. every muscle has a varying number of motor units so they can generate different frequencies.
e. each motor unit can innervate a different number of muscle fibers.
Explanation:
Electromyography (EMG) is a diagnostic procedure used to measure the response of muscles and nerves to electrical activity. A motor unit is composed of one motor neuron and muscle fibers it innervates. The number of muscle fibers in each motor unit can vary among different muscles and even among motor units within the same muscle. Each motor unit is known to innervate a variable number of muscle fibers, but each single muscle fiber is innervated by only one motor.
Separation of sister chromatids (D)
Neurotransmitters that have narcotic-like effects are called endorphins. These neurotransmitters are responsible for our feelings of excitement or satisfaction.
