What must happen before a motor unit will fire (discharge)? What occurs immediately after discharge of the motor unit?
What will be an ideal response?
ANS: In order for a motor unit to discharge, there must be sufficient facilitation (buildup of charges) at
the anterior horn cell (AHC). Once threshold is reached, an impulse is conducted down the axon
and all innervated fibers contract. Immediately after firing and fiber contraction, the motor unit
goes through latency, or a refractory period, during which depolarization cannot occur.
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Which type of command structure is used for large-scale incidents or disasters that are complex and require the concerted response of multiple agencies?
A) Incident command B) Singular command C) Unified command D) Operations command
Special proteins that are made by lymphocytes that fight invaders are known as:
A) glycoproteins B) amino acids C) antigens D) antibodies