Chemical and Nervous Control in Humans PDF

Chemical and Nervous Control in Humans General Biology 2 1/2 Science, Technology, Engineering, and Mathematics Humans are constantly exposed to various internal and external changes, such as increase in blood sugar level, high temperatures, and thirst. They are also predisposed...

Chemical and Nervous Control in Humans General Biology 2 1/2 Science, Technology, Engineering, and Mathematics Humans are constantly exposed to various internal and external changes, such as increase in blood sugar level, high temperatures, and thirst. They are also predisposed to a certain sleep-wake cycle. 2  Learning Objectives At the end of the lesson, you should be able to do the following: 1. Determine the functions of the nervous system. 2. Compare and contrast the divisions of the nervous system. 3. Explain how an action potential is generated and propagated. 4. Determine the structures and functions of the brain. 3 Functions of the Nervous System 1. Receiving sensory input 2. Integrating information 3. Controlling muscles and glands 4. Maintaining homeostasis 5. Establishing and maintaining mental activity 4 Divisions of the Nervous System The nervous system coordinates body functions through both electrical impulses (action potentials) and chemical messengers (neurotransmitters). 5 Divisions of the Nervous System The autonomic division of the peripheral nervous system controls the involuntary functions of the body. 6 Divisions of the Nervous System Parasympathetic: Rest-and-digest functions Sympathetic: Fight-and-flight responses 7 Edpuzzle quiz The action potential Edpuzzle video quiz link: https://edpuzzle.com/assignments/678edc9aee11f8acfa12eacb/watch 8 To sum it all up! 9 Brain 10 Cerebrum 1. Frontal lobe is important in the control of voluntary motor functions, motivation, aggression, mood, and olfactory (smell) reception. 2. Parietal lobe is the principal center for receiving and consciously perceiving most sensory information, such as touch, pain, temperature, and balance. 3. Occipital lobe functions in receiving and perceiving visual input and is not distinctly separate from the other lobes. 4. Temporal lobe is involved in olfactory (smell) and auditory (hearing) sensations and plays an important role in memory. Its anterior and inferior portions, called the “psychic cortex,” are associated with functions such as abstract thought and judgment. 11