Lesson 1.1.3

1.1.3 page 3 Lab

Module 1: Lesson 3 Assignment—Lab Part 1

Retrieve your copy of Module 1: Lesson 3 Assignment that you saved to your computer earlier in this lesson. Complete Lab Part 1. Save your completed assignment in your course folder. You will receive instructions later in this lesson on when to submit your assignment to your teacher.

 

Try This

To complete your understanding of the structures and their functions, complete the following table by selecting your response and dropping it into the correct space on the chart.  Check your answers, and store your work in your course folder.

The Three Major Types of Neurons

Sensory Neuron

Interneuron

Motor Neuron

long dendrites

regular dendrite length

regular dendrite length

short axon

regular axon length

longer axon

found at the beginning of the reflex arc

found at the middle of the reflex arc

found at the end of the reflex arc

transmits impulses from sensory receptors to interneuron

transmits impulse from sensory neuron to motor neuron

transmits impulse from interneuron to effectors

image or sensory neuron

image of interneuron

image of motor neuron

 

Reflex Arcs
reflex: an inborn, unlearned behaviour that results from the stimulation of a special neural pathway called the reflex arc

In some sports, you need to be fast. In hockey, for example, the forward has to be faster than the defender to score. The goalie has to react quickly to stop the puck. Did the goalie think about it, or did the goalie just do it?  Remember when you withdrew your hand because the handshake hurt? After you thought about what happened, you were embarrassed.  Some neurons are organized into special neural pathways that allow you to react before you are consciously aware of what is happening. These unlearned, unconscious, and very rapid pathways are called reflex arcs. The resulting behaviour is called a reflex. Do the following lab to understand more about reflex arcs.

 

Module 1: Lesson 3 Assignment—Lab Part 2

Retrieve your copy of Module 1: Lesson 3 Assignment that you saved to your computer earlier in this lesson. Complete Lab Part 2. Save your completed assignment in your course folder. You will receive instructions later in this lesson on when to submit your assignment to your teacher.