1. You and your family are going to the beach because it is summer. However, minutes after swimming, your skin darkens. STIMULUS:RESPONSE :FEEDBACK MECHANISMS : 2. When a tissue or blood vessel is...

1. You and your family are going to the beach because it is summer. However, minutes after swimming, your skin darkens. STIMULUS: RESPONSE : FEEDBACK MECHANISMS : 2. When a tissue or blood vessel is torn or cut, the cells near the damaged part send out signals to activate platelets. As platelets begin to form a plug, more chemical signals are released to attract more platelets until the bleeding stops. STIMULUS: RESPONSE : FEEDBACK MECHANISMS :