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

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

Sensory Receptors Sensory Receptors are specialized 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 Nociceptors Thermoreceptors Mechanoreceptors Photoreceptors

P. 40 5 Receptor Types Chemoreceptors Nociceptors Thermoreceptors Mechanoreceptors 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

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

Name those Receptors!!!!!!! Table Talk 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

Receptor Types Mechanoreceptors Photoreceptors 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

What are some commonalities between the 5 types of receptors? 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

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

Each table is assigned a type of receptor 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

Each person is assigned a # 1-5 Get in your “new” groups 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