1 List the physiological events that occur between delivery of the stimulus and the start of the recorded response?

Answer 1

The speed of nerve impulse transmission changes as the body ages. In infants, the transmission speed is only about half that seen in adults. By age five, most people have attained the adult velocity. A gradual decline in conduction velocity begins as people reach their 20s, and continues for the remainder of life.

Another factor that influences conduction velocity is the length of the nerve itself. An impulse that has to travel a longer distance will take longer. Some nerves are naturally longer than others. Measurement of nerve conduction takes into account the length of the target nerve.

Some other factors are:

· Initiation of action potential in nerve fibers;

· Conduction of impulse;

· Release of acetylcholine from the nerve terminals;

· Binding of acetylcholine to receptors of the motor end plate;

· Depolarization of the end plate;

· Initiation of action potential in muscle fibers;

· Muscle contraction.

Answer 2

After the stimulus is delivered, it travels through sensory neurons to the central nervous system, where it is processed in the brain. The brain then sends signals back through motor neurons to initiate the response. This process involves synaptic transmission, action potential generation, and muscle contraction.