1. Sensory Mechanism
Marie Černá

2. Five categories Mechanoreceptors - muscle spindle - hair cell in ear
Pain receptors (nociceptors)
Thermoreceptors
Chemoreceptors - gustatory (taste)
- olfactory (smell)
Electromagnetic receptors
- photoreceptors

3. Structure of the eye

4. Retina
Photoreceptors
Neurons

5. Cells of Retina

6. The effect of light on retinal

7. Focusing in the eye

9. Structure of the ear

10. Structure of the ear

11. A cross-sectional view of the cochlea with three canals

12. Mechanoreceptors

13. Mechanism of hearing
Vibrations, caused by sound waves, in the tympanic membrane are conducted via 3 small bones to the oval window and create pressure waves in the cochlear fluid perilymph.
The waves pass through the vestibular canal to the apex of the cochlea, then back toward the base of the cochlea via the tympanic canal and end on the round window.
Semicircular
canals
Cochlea

14. As the basilar membrane vibrates,
hair cells repeatedly brush against
the tectorial membrane.
This stimulus causes
hair cells to depolarize.
Perilymph

15. Organs of balance

16. A vestibule contains two chambers: the utricle and saccule

18. Gustatory chemoreceptors

19. Olfactory chemoreceptors

20. Nociceptors + Thermoreceptors

21. Literature Biology, eighth edition, Campbell, Reece
Unit seven: Animal Form and Function
Chapter 50: Sensory and Motor Mechanisms
Concept 50.1, 50.2, 50.3, 50.4
Pages 1087 – 1105