Chapter 49 Main Concepts

1
Chapter 49 - Main Concepts

• Sensory receptors transduce stimulus energy and
  transmit signals to the nervous system.
• Sensory receptors are categorized by the type of
  energy they transduce.
• The light-absorbing pigment rhodopsin operates
  via signal transduction.

2
Main Concepts

• The mammalian hearing organ is within the inner
  ear.
• Most invertebrates have gravity sensors and are
  sound sensitive.
• Perceptions of taste and smell are usually
  interrelated.
• Muscles move skeletal parts by contracting.

3
Main Concepts

• Calcium ions and regulatory proteins control
  muscle contraction.
• Interactions between myosin and actin underlie
  muscle contractions.

4
Points to Know

• What are the main sense receptors in humans and
  how do they work?
• How do muscles contract?
• What are the various muscle types and where are
  they found in the body?