Physiology Tour
Emergent properties of the cells within the body.
Physiology : neuromuscular junction - motor unit
Check out the high definition version of this video here : blip.tv 1- The body movements are controled by muscles. 2- while contracting, the muscle is reduced in length and join closer the 2 bones on which it is inserted. 3- However,it's the nervous system that controls the muscle contraction by the means of nerves. 4- Each nerve contains thousands of nerve fibers arranged in dendrites which carry out sensory information and axons that convey motor impulses. 5- Each motor neuron innervates several muscle fibers, 6- this association define what is called a motor unit. 7- In general, the fewer the muscle fibers are in a motor unit the more the movement is precise. 8- for example in the temporalis muscle there are 1000 muscle fibers per motor unit while in the external ocular muscles there are only 5, this reflects the accuracy of the eye movements. 9- The intensity of the muscle contraction is proportional to the number of motor units recruited. 10- A neuron gives several endings that sometimes scatter throughout the thickness of a muscle, 11- each terminal is intended to stimulate a single muscle fiber in a specific place: the neuromuscular junction. 12- Just before the axon terminal, the neuron loses its myelin sheath and forms a terminal button. 13- The terminal button contains many mitochondria that provides energy and several synaptic vesicles. 14- Each vesicle contains approximately 10000 of acetylcholine molecules, the unique neurotransmitter of the neuromuscular <b>...</b>
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The Science of Stress Physiology Emotions Fight Flight
www.hunterkane.com Till 1994 we believed —a wild animal, whatever it happens to be—came through to a relay station called the thalamus, the thalamus sends the information to the cortex, or the pre-frontal cortex. What was believed was the cortex initiates an automatic knee-jerk response: Behavioural - we jump back; Physiological - we increase our blood pressure and adrenalin to fight or flight, and then an Immunological response in case the system is damaged in some way. But in fact, back in 1994, Joseph LeDoux and his team discovered this pathway to this guy called the amygdala. Now the amygdala is a key emotional centre in the brain, and what they discovered was that it was the amygdala that initiates the response, not the cortex. In fact, even more important than that, the amygdala initiates the response before the information reaches the cortex. Now, because the amygdala is there to keep us alive, it's actually not very accurate, but very high speed, and the cortex is very accurate, but relatively slow. So, we've initiated a response; activated a response before the information even reaches the cortex. Why does that matter? Well, the cortex is where we learn new things; it's where we learn how to behave. So what we call default behaviours today—and a perfect example of that would be road-rage—so we might get involved in some altercation on the road, we get very frustrated and angry with somebody, then a moment later we realise we perhaps overreacted; because that's <b>...</b>
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Physiology of Lipoprotein Metabolism
Reducing the Atherogenic Burden Molecular Disease Branch National Heart, Lung and Blood Institute National Institutes of Health Bethesda, Maryland
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Anatomy & Physiology Review of Skeletal Muscle Tissue
Video i recorded off a cd-rom. Sorry with the background noises, my laptop was making all sorts of weird noises at random times. Hope this helps!
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Human Physiology : What Is Microbiology?
Microbiology has to do with things that are alive, but are too small to be seen with the naked eye. Learn about microbiology, bacteria and disease with information from a science teacher in this free video on physiology and the human body. Expert: Janice Creneti Bio: Janice Creneti has a BS in secondary science education and a BA in biology from Boston University. Filmmaker: Christopher Rokosz
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Renal Physiology - Renin Angiotensin Aldosterone System 1/7 - USMLE
The renin-angiotensin system (RAS) or the renin-angiotensin-aldosterone system (RAAS) is a hormone system that regulates blood pressure and water (fluid) balance. When blood volume is low, juxtaglomerular cells in the kidneys secrete renin directly into circulation. Plasma renin then carries out the conversion of angiotensinogen released by the liver to angiotensin I. Angiotensin I is subsequently converted to angiotensin II by the enzyme angiotensin converting enzyme found in the lungs. Angiotensin II is a potent vaso-active peptide which causes blood vessels to constrict, resulting in increased blood pressure. Angiotensin II also stimulates the secretion of the hormone aldosterone from the adrenal cortex. Aldosterone causes the tubules of the kidneys to increase the reabsorption of sodium and water into the blood. This increases the volume of fluid in the body, which also increases blood pressure. If the renin-angiotensin-aldosterone system is too active, blood pressure will be too high. There are many drugs that interrupt different steps in this system to lower blood pressure. These drugs are one of the main ways to control high blood pressure (hypertension), heart failure, kidney failure, and harmful effects of diabetes. ▶▶▶ ▶▶▶▶▶▶▶▶▶▶▶▶▶◀◀◀◀◀◀◀◀◀◀◀◀◀◀◀◀ 400+ Hours of Video Lectures on Basic Medical Sciences now available for Members at www.DrNajeebLectures.com. Our videos work great on iPhone and iPad so you can Study on the Go anytime <b>...</b>
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The Physiology of Cardiac Output
This video will discuss one of the key components of cardiovascular physiology - cardiac output.
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Peripheral Nervous System: Anatomy, Physiology, and Pathology
Duke Neurology of Raleigh's Vinod Krishnan, MD, helps to make sense of the peripheral nervous system.
Australian Coaches - Physiology and energy systems
This video provides a basic introduction to the energy systems, the components of fitness and the principles of training. These areas are important for coaches to understand and apply in the preparation of training programs for athletes.
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Human Body | Human Anatomy and Physiology
www.spi-der-man.com -- Principle of Human Anatomy & Physiology Anatomy represents the structure and Physiology refers the function. Anatomy and physiology of Human describe every aspect of how the human body sustains life. The principle pieces of information can be categorized into five areas. 1. Levels of OrganizationThe body is organized into levels that build upon each other. It begins with the smallest atoms and molecules that control the chemical reactions required for the body to function. The basic structural and functional units in the body---cells---are the next level. Learning how different cells work is key to understanding how organs and systems function. 2. Support and Movement The bones in the skeletal system support soft tissues, protect internal organs and create a structure that enables movement. Three types of muscle---smooth, cardiac, skeletal---are responsible for motion, the production of heat and maintenance of posture. Physiology looks at the chemistry of muscle contraction and the development of different types of bones and muscle. 3. Systems of ControlThe systems that control the body are the nervous system and the endocrine system. The nervous system has two parts: the central nervous system (CNS) and the autonomic nervous system. 4. Maintaining Homeostasis. Homeostasis is a state of balance. Nothing in the body functions properly or remains healthy without homeostasis. Homeostasis is maintained by the cardiovascular, lymphatic, respiratory <b>...</b>
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Respiratory Physiology Part 1
Part one of a three part video discussing the physiology of respiration. The ultimate goal of respiration is to transport oxygen to the mitochondria of the cells. This involves getting oxygen into the lungs (ventilation), getting the oxygen into the blood (external respiration), transporting the oxygen through the blood (transport), moving the oxygen out of the blood into the tissue (internal respiration) and then using the oxygen to make the body's energy molecule, ATP (cellular respiration). Each step is discussed as well as some underlying principles. Lastly, the a brief introduction to how respiratory pathologies can be viewed by understanding the underlying steps is discussed. A copy of the diagram can be found at... www.kirkwood.edu
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Human Physiology : What Is a Chromosome?
A chromosome is a long strand of DNA that contains the information that makes individuals unique. Find out how many chromosomes people have with information from a science teacher in this free video on physiology and the human body. Expert: Janice Creneti Bio: Janice Creneti has a BS in secondary science education and a BA in biology from Boston University. Filmmaker: Christopher Rokosz
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Plant Physiology: Phototropic Response (Britannica.com)
****CLICK HERE for RELATED CONTENT**** Tropism - www.britannica.com FREE TRIAL - www.britannica.com
Human Physiology : What Is a Nucleotide?
Nucleotides are little components that make up DNA, and they are connected by phosphate molecules. Learn about the components of nucleotides, which includes phosphate groups, sugar molecules and nitrogen bases, with information from a science teacher in this free video on physiology and the human body. Expert: Janice Creneti Bio: Janice Creneti has a BS in secondary science education and a BA in biology from Boston University. Filmmaker: Christopher Rokosz
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Being an Exercise Physiologist part 1
Want to know what it takes to be a sports physiologist? WhyOhGee talks to Daniel Plews about working to improve an athlete's performance.
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Respiratory Physiology Part 2
Part two of a three part video discussing the physiology of respiration. The ultimate goal of respiration is to transport oxygen to the mitochondria of the cells. This involves getting oxygen into the lungs (ventilation), getting the oxygen into the blood (external respiration), transporting the oxygen through the blood (transport), moving the oxygen out of the blood into the tissue (internal respiration) and then using the oxygen to make the body's energy molecule, ATP (cellular respiration). Each step is discussed as well as some underlying principles. Lastly, the a brief introduction to how respiratory pathologies can be viewed by understanding the underlying steps is discussed. A copy of the diagram can be found at... www.kirkwood.edu
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Human Physiology : How Does the Body Make Blood?
Several parts of blood, including red blood cells, white blood cells and platelets, are made inside bone marrow. Find out where blood plasma comes from with information from a science teacher in this free video on physiology and the human body. Expert: Janice Creneti Bio: Janice Creneti has a BS in secondary science education and a BA in biology from Boston University. Filmmaker: Christopher Rokosz
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Anatomy and Physiology
Introduction to anatomy and physiology. Topics include the levels of organization (including tissues). Feedback mechanisms are also included. Images from 'Biology: Concepts and Connections' (6th Ed.) by Campbell, Reece, Taylor, Simon, Dickey; Pearson Education
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Anatomy & Physiology Introduction & Survival Tips
This video is the first in a series that are part of an online course in Human Anatomy & Physiology. It covers introduction to Human A&P as well as gives some insiders hints to surviving Anatomy & Physiology. To see more videos, or get access to podcasts, presentations, and exam reviews check out www.mrfordsclass.net
Essentials of Human Anatomy and Physiology
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ECG - EKG Interpretation 1/20 - Cardiac Physiology - USMLE Step 1
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Renal Physiology Lecture 1 Part 1
Body Fluid Compartments Lecture 1 Part 1
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Physiology of Post-Traumatic Stress Disorder (1 of 3)
June 17, 2008 - Psychologist Michael Ryan, Psychotherapist Carolyn Carino, Vietnam War veteran Jim Hodges, and Hauenstein Center Director Gleaves Whitney talk about returning veterans and post-traumatic stress disorder.
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Respiratory Physiology Chapter 13
Jim Brinson, Associate Professor of Life and Physical Sciences at Ivy Tech Community College in Terre Haute, Indiana, discusses Respiratory Physiology.
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Endocrine System Physiology.wmv
This is an overview of endocrine system physiology. I completely forgot to mention, my apologies, that steroid hormones are also slower in eliciting a cellular response than peptide hormones. Steroid hormone responses include transcription and translation and then a physiologic response while peptide hormones activate inactive secondary messengers that interact with enzymes that are already within the cystol. Steroid hormones also tend to stay bound to their receptors longer than peptides which is another reason why they are slower to be cleared.
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Co2 Transport 1/6 - Respiratory Physiology - USMLE Step 1
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Co2 Transport 2/6 - Respiratory Physiology - USMLE Step 1
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Understanding the Anatomy & Physiology | 3D Human Body Anatomy
guideunite.com Get The Edge, Learn EVERYTHING You Need To Know About Anatomy and Physiology, And Ace Any Test With The Ultimate Home Study Course -- Guaranteed To Give You The Education That You Need, Faster Than You Ever Dreamed Possible! No matter whether you're a Medical Practitioner or Specialist Student or Educator Researcher or Anatomist Injury Law Attorney Trainer or Sports Professional Chiropractor or Therapist Nurse or Paramedic You see, once an expert explains to you how to actually do it...in language you can easily understand...this is almost as easy as...eating lunch. " Take A Journey Inside The Mysterious World Of The Human Body ... " Find out how human muscles, nerves, bones,organs, glands, connective tissue and more, function and communicate with each other Discover the molecular-level workings of your glandular, genitourinary, digestive, cardiovascular, and other systems AWARD WINNING HOME STUDY COURSE AS SEEN ON THE MARTHA STEWART SHOW! Human Anatomy & Physiology Home Study Course Hundreds of Medical Topics Covering Everything You Want To Know. I can't force you to ACT NOW. That's what makes the winners, well, winners! They see an opportunity that's too good to pass up and they do it. Now go to: guideunite.com
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Cardiac Cycle 1/8 - Heart Physiology - USMLE Step 1
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Gastrointestinal Physiology, VIP video series
www.DrKrupka.com Dr. Krupka explains the functional anatomy and physiology of the gastrointestinal tract. Dr. Krupka uses functional medicine and holistic nutrition to assess and treat patients with myriad chronic issues.
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