Question

1. Order the steps of the knee jerk reflex, using Figure 6.16 as a reference. (20 pts)

An action potential travels down the somatic motor neuron

The muscle spindle mechanoreceptor stretches and fires

Tap to the patellar tendon of the knee

The action potential travels through the sensory neuron

The information is integrated in the spinal cord

Leg kicks

Quadriceps muscle contracts

2. Categorize these as either local control or systemic control. If the term belongs to both or neither, don’t move the term. (20 pts)

Positive and negative feedback loops

Cytokines

Hormones

Neurotransmitters

Long-distance communication

ParacrinesShort-distance communication

Chemical communication

Reflex control

Ions through gap junctions

Answer 1