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Nerve Impulse Transmission Animation

By: Administrator, Views: 10001

How nerves transmit impulses. Stimulation of a nerve occurs at a receptor. Sensory receptors Specialized to specific types of stimulation such as heat, cold, light, pressure, or pain. React by initiating a chemical change or impulse. All-or-none principle Means that no transmission occ...

Types of Burns

By: Administrator, Views: 9568

Burns are one of the most common household injuries, especially among children. The term "burn" means more than the burning sensation associated with this injury. Burns are characterized by severe skin damage that causes the affected skin cells to die. Most people can recover from burns withou...

Types of Shock (Part 2 of 2)

By: Administrator, Views: 9303

Shock is a life-threatening condition in which delivery of oxygen to the organs is low, causing organ damage and sometimes death. Blood pressure is usually low.

Dendrite Animation

By: Administrator, Views: 10047

Dendrites (from Greek δένδρον déndron, "tree"), also dendrons, are branched protoplasmic extensions of a nerve cell that propagate the electrochemical stimulation received from other neural cells to the cell body, or soma, of the neuron from which the dendrites project. Electrical stimula...

Coronary Heart Disease

By: Administrator, Views: 9811

Coronary heart disease accounted for 23.5 percent of all deaths in the U.S. in 2008. According to the Centers for Disease Control and Prevention (CDC), about 735,000 Americans have a heart attack each year. Warning signs and symptoms include chest pain or discomfort and shortness of breath. Ex...

Introduction to Insulin

By: Administrator, Views: 10272

The islets of Langerhans are composed of three major types of cells: Alpha cells secrete glucagon, elevating blood sugar. Beta cells secrete insulin, maintaining normal blood sugar. Delta cells secrete somatostatin, which suppresses release of glucagon and insulin. Hyposecretion or inadequa...

Nerve Type Animation (Part 1)

By: Administrator, Views: 291

Used to describe neuronal processes conducting impulses from one location to another. Nerve fibers: - Nerve fibers of the PNS are wrapped by protective membranes called sheaths. - Myelinated fibers have an inner sheath of myelin, a thick fatty substance, and an outer sheath or neurilemma compo...

Deafness Culture

By: Administrator, Views: 9820

Deaf culture is the set of social beliefs, behaviors, art, literary traditions, history, values, and shared institutions of communities that are influenced by deafness and which use sign languages as the main means of communication. When used as a cultural label especially within the culture, the...

Hyperglycemia Animation

By: Administrator, Views: 10733

Hyperglycemia means high (hyper) glucose (gly) in the blood (emia). Your body needs glucose to properly function. Your cells rely on glucose for energy. Hyperglycemia is a defining characteristic of diabetes—when the blood glucose level is too high because the body isn't properly using or doesn...