Intro to Senses 5m25s (if time)

Intro to Senses 5m25s(if time) • Vision • Touch • Smell • Hearing • Taste

12.1 Sensory Receptors 2.1 Atoms, Ions, and Molecules Sponge: Set up Cornell Notes on pg. 41 Topic: 12.1Sensory Receptors Essential Question: • What do all types of receptors have in common? • What do all types of receptors have in common?

Sensory Receptors • Sensory Receptors arespecialized cells or multicellular structures that collect information from the environment • Link our nervous system to the outside world • Help our bodies maintain homeostasis

White Boards!!! Get Your Whiteboards!!!! When you hear the word, please draw a picture AND/OR write words of what comes to your mind.

Chemoreceptors • Thermoreceptors • Mechanoreceptors • Photoreceptors • Nociceptors

P. 40 5 Receptor Types Chemoreceptors NociceptorsThermoreceptorsMechanoreceptors Photoreceptors

P. 40 5 Receptor Types ChemoreceptorsNociceptorsThermoreceptorsMechanoreceptors Photoreceptors • Using your computer research each of the types of receptors: • Description • Function • Sense associated with that receptor • Read the provided informational sheet • Highlight • Add any NEW information to tree map • Add at LEAST one illustration to each branch of the tree map

Pg. 40 Using Your Senses (4m5s) • Add to tree map • (if missing): • Which sensory receptors go with which senses? • Vision • Touch • Smell • Hearing • Taste

Name those Receptors!!!!!!! • Be prepared for Mrs. Mc to randomly call on you to NAME and DESCRIBE those receptors • Table Talk • What does each receptor RESPOND to? • ________responds to changes in _______... • What sense is associated with each type of receptor?

Receptor Types • Chemoreceptors (Ke-mo-receptors) • Respond to changes in chemical concentrations • Taste/Smell • Nociceptors or pain receptors • Respond to tissue damage • Excess mechanical, electrical, thermal, or chemical energy • Touch • Thermoreceptors • Respond to changes in temperature • Touch

Receptor Types • Mechanoreceptors • Respond to changes in mechanical forces (detect deformed receptors) • Touch/Hearing • Proprioceptors: sense changes in the tensions of muscles and tendons • Baroreceptors: sense changes in blood pressure • Stretch receptors: in lungs; sense degree of inflation • Photoreceptors • Respond to changes in light intensity • Vision

Pg. 41 What are some commonalities between the 5 types of receptors? • RESPOND TO CHANGES!!!!!!

Sensory Receptors Each receptors is sensitive to a distinct kind of environmental change and is much less sensitive to other forms of stimulation: • Thermoreceptors- temperature changes • Chemoreceptor- chemical changes....etc BUT, they may respond to other stimuli if it is strong enough Ex: Pain receptors can be stimulated by heat, cold, or pressure

Sensory Receptors Similarly, factors other than light, such as a sharp blow to the head, may trigger nerve impulses in visual receptors Ex: May “see stars” even though no light is entering the eye ANY impulses reaching the visual cortex are interpreted as light

Pg. 40 Sensory Receptors (3m) • Add to your tree map: • Add a word that helps you remember the function of the receptor • Any additional information

The 5 Types of Sensory Receptors Directions • Each table is assigned a type of receptor • Read your informational sheet • Highlight the MOST important information (FUNCTIONS/Job/description/etc..) • Create a (Quick!) informational poster as a group Time: 20 minutes

The 5 Types of Sensory Receptors Directions • Each person is assigned a # 1-5 • Get in your “new” groups • Each “expert” describes their receptor • As a group, create a (quick) tree-map of the 5-receptor types, using your informational sheet as evidence • Include illustrations Time: 20 minutes

Intro to Senses 5m25s (if time)