Muscle, Nervous System Flashcards
Type of muscle is involuntary, possesses striations, and demonstrates an intermediate twitch?
Cardiac
Which connective tissue membranes surrounds each fascicle?
Perimysium
Refers to The contractile unit of a muscle and extends from Z disc to Z disc
Sarcomere
Filament is made up of __?
Actin
Blocks the myosin binding sites on actin during periods of rest
Tropomyosin
Depolarization of the sarcolemma is the result of __ ions rushing into the muscle cell membrane
Na (sodium)
All muscles controlled by a single motor neuron
Motor unit
Contractions that permit the muscle to shorten
Concentric
During a typical myogram, the contraction period corresponds to ___.
Increasing calcium levels
Division of the nervous system often called the “rest and digest” division & is characterized by the three Ds: digestion, diuresis, and defecation
Parasympathetic
Neuroglial cells that regulate the environment around the cell body of a neuron in the CNS (blood brain barrier)
Astrocyte
The process of a neuron that typically receives impulses from adjacent neurons
Dendrite
The outer layer of a Schwann cell where all the cytoplasm and organelles are located
Axolemma
The period after an initial stimulus has been received and when the neuron is not sensitive to another stimulation
Refractory period
Ion that enters the axon terminal to stimulate the release of neurotransmitters by exocytosis
Ca (calcium)
