BIO 182 Chapter Notes - Chapter 35.1,36.1,37.1,&38.1: Thermoreceptor, Respiratory System, Eukaryote
Document Summary
Nervous system network of connected nerve cells (neurons: allows organisms to sense and respond to the environment, muscle action, maintain homeostasis. Neurons sense : light, temperature, chemicals, physical forces. Nervous systems became more complex over time as organisms became more complex. Types of neurons: sensory neurons receive and transmit information from environment, interneurons process info from sensory neurons and send signals to other parts of the body, motor neurons produce responses to signals. All animals have nervous systems except sponges. Cnidarians have the simplest nervous systems of any eukaryote. Sensory organs group of sensory neurons that send signals to the brain after detecting stimuli. Sensory transduction convert stimuli into nerve pulses. Electromagnetic receptors respond to electrical, magnetic, or light stimuli: photoreceptors light, electroreceptors, thermoreceptors temperature, nociceptors pain. 37. 1 muscles: biological motors that generate force and produce movement. Striated muscles filament are arranged in a regular pattern: skeletal muscles connect to skeleton, cardiac muscle makes up the heart.
