When the motor neuron of a skeletal muscle motor unit is stimulated repetitively, it is called a if the muscle does not relax completely between stimuli. If the motor unit relaxes partially, but not completely between stimuli, it is called . If the motor unit force does not decline between stimuli, it is called .

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth