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Fetal Pig Anatomy Developed by Dr. Mark Stanback
Fetal Pig Anatomy Developed by Dr. Mark Stanback

... lack of iodine), the anterior pituitary increases the release of thyroid stimulating hormone (TSH). This may stimulate the proliferation of thyroid cells, but if there is no iodine, thyroxine production will not increase, which causes additional TSH release. The thyroid also produces calcitonin, a ...
Fetal Pig Anatomy
Fetal Pig Anatomy

... Examine the neck, thoracic, and abdominal regions of your pig (Fig. 5). First find the thymus gland, which partially covers the anterior portion of the heart and extends along the trachea to the larynx. The thymus plays an important role in the development and maintenance of the immune system – thi ...
Lampry presentation
Lampry presentation

... Excretory System • Kidney: filters out waste from the blood – Ions, water and other nitrogenous wastes – Responsible for maintaining osmoregulation • The balance between the salts in the body and the salts in the environment. • Freshwater: kidneys excrete extremely dilute urine to maintain the ion ...
Chapter 7 - Lamont High
Chapter 7 - Lamont High

... abnormal growth of invasive cells • The tumors that form reduce the available volume of the lung for gas exchange • Often carcinogens (chemicals that cause cancer) trigger the production of tumors in the lungs • Carcinogens are found in cigarette smoke, but also include asbestos and ...
Overall Function of Respiratory System
Overall Function of Respiratory System

... • 3) diffusion (how gas gets across the air blood barrier) – rate of diffusion • pressure gradient • diffusability of the gas – CO2 very soluble, in and out of solution easily – O2 low solubility, transported by hemoglobin • thickness of membrane ...
Directed Reading Packet
Directed Reading Packet

... _____________ intestines. These organs make up a long tube called the ___________________________ tract, which goes from mouth to ____________. ...
hydrotherapy
hydrotherapy

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Exam 1 Q2 Review Sheet

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USABO Semifinal exam 2003 Answer Key

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Fellmann et al/Human Geography, 8/e

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PSW118 - Body Structure and Funtion I F16 W17

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... reinforced with cartilage. From larynx, air passes into the trachea, or windpipe. Rings of cartilage maintain the shape of trachea, The trachea forks into two bronchi (branch to bronchioles), one leading to each lung. The entire system of air ducts has the appearance of an inverted tree, the trunk b ...
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F - Mrs. GM Biology 200

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gas exchange
gas exchange

... – Red, iron-containing hemoglobin – is used by almost all vertebrates and many invertebrates and – transports oxygen, buffers blood, and transports CO2. ...
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Homeostasis

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... information throughout the body. The nervous system is divided into two main parts. - The central nervous system (CNS) is the body’s main control center and consists of the brain and the spinal cord. This part processes information and sends instructions to other parts of the body. - The peripheral ...
Respiratory Physiology
Respiratory Physiology

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... How is breathing controlled? • The Brain Stem (AKA: medulla oblongata) – controls breathing by detecting CO2 ( not O2). – If blood is high in CO2, you breathe faster. ...
HUMAN BIOLOGY CHAPTER 2: The Chemistry of Living Things 2.2
HUMAN BIOLOGY CHAPTER 2: The Chemistry of Living Things 2.2

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Homeostasis



Homeostasis or homoeostasis (homeo- + -stasis) is the property of a system in which variables are regulated so that internal conditions remain stable and relatively constant. Examples of homeostasis include the regulation of temperature and the balance between acidity and alkalinity (pH). It is a process that maintains the stability of the human body's internal environment in response to changes in external conditions.The concept was described by French physiologist Claude Bernard in 1865 and the word was coined by Walter Bradford Cannon in 1926. Although the term was originally used to refer to processes within living organisms, it is frequently applied to automatic control systems such as thermostats. Homeostasis requires a sensor to detect changes in the condition to be regulated, an effector mechanism that can vary that condition, and a negative feedback connection between the two.
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