Answer Key

Signal Squad Worksheet & Video Notes

TEACHER USE ONLY

Phase 1: Ruler Drop Lab

Expected Data Trends:

Students should observe their catch distance (cm) decreasing over the 5 trials. This represents an increase in reaction speed as the neural pathway becomes more efficient.

Reflection Answer:

"My reaction time got faster/smaller. This happened because my brain practiced the circuit, strengthening the connection between seeing the drop and moving my fingers."

Phase 2: Video Guided Notes

The brain functions on an: Input-Output basis.

What are neurons? Cells that process information. They form circuits to communicate.

Sensory Neurons

Interneurons

Motor Neurons

LOCATION:

Sense organs (skin, eyes, ears, etc.) and peripheral nervous system.

LOCATION:

Inside the Brain and Spinal Cord (The Central Nervous System).

LOCATION:

Spinal cord out to the muscles and glands of the body.

PRIMARY JOB:

Sends information TO the brain about what is happening in the environment.

PRIMARY JOB:

Decides how to respond; passes signals from sensory neurons to motor neurons.

PRIMARY JOB:

Carries out the actual response/action in the body (movement).

Signal Path Sequence

STEP 1

Stimulus

STEP 2

Sensory

STEP 3

Interneuron

STEP 4

Motor

STEP 5

Response

Signal Squad Answer Key

Signal Squad Answer Key