LAB 7: Sensory Reception

Lab Goals:• Know major terminology associated

with sensory reception and the nervous system

• Identify structures and their functions in the vertebrate eye

• Practice science process skills: generating hypotheses and predictions, statistical analysis of data, graphs, and drawing conclusions

TWO PARTS OF THE NERVOUS SYSTEM

1. Central Nervous System (CNS)• Brain• Spinal Cord

2. Peripheral Nervous System (PNS)• Sensory receptors• Supporting neurons

Neurons1) Signal travels from

cell body down axon

2) Neurotransmitter is released from synaptic terminal

3) Received by dendrites of an adjacent neuron

4) Repeat

Sensory receptors

1. Mechanoreceptors-Hearing

2. Photoreceptors-Seeing

3. Pain receptors

4. Chemoreceptors

5. Thermoreceptors

PHOTORECEPTORS• Rods

• Vision in dark• Single type

1. Rhodopsin (Black/white/grey)

• Cones• Vision in light• Three types (based

on type of opsin)1. Red2. Green3. Blue

VISION PHYSIOLOGY

Humans Octopus

TODAY’S LAB1. T-test2. Sheep Eye Dissection (Procedure 1)3. Reaction Timer (Procedure 2)4. Which is faster seeing or hearing?

5. Fern spores (pg. 133, 139; camera or draw)

6. Fungi (procedure on handout)

vs. We will derive methods together!

NEXT WEEK• Sensory Reception Lab DUE• 20 pt quiz on Exercise Physiology

and Sensory Reception• New TA! Email:

Michael.Rodriguez@colorado.edu