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Physiology rss

Transport Across Capillary Walls

June 16, 2018

New Site Substances are transported across the capillary wall in two main methods By diffusion : across receptors, channels By filtration : as a result of Starlings forces Direction and amount of fluid transported by Starlings forces is determined by the hydro static and oncotic pressures on both sides of the capillary walls. Hydrostatic pressure… Read More ›

Formation of Body Fluid

New Blog   Since the net force at the arteriolar end is directed from the capillary towards the interstitial space, blood plasma filters into the surrounding tissue Around 1/200th of blood volume (0.5%) of blood plasma moves alongwith nutrienst, gases, minerals and chemicals {excluding red blood cells amd plasma proteins} In a healthy male adult,… Read More ›

Respiratory Regulation of Acid Base Balance

See our New Website Rapid changes in ventilation cause changes in pH due to shifting CO2 concentrations. When alveolar ventilation changes, the partial pressure of CO2 in the arteries changes. Since CO2 is lipid soluble, it can easily cross the lipid bilayer and Cross the membranes. The change in arterial pH is picked by central… Read More ›

Buffering as a Mode of Acid Base Balance

A buffer is a substance that can accept/release H+ ions to maintain the pH of a solution constant. The human body has many major buffer systems which Provide a huge buffering capacity Provide immediate effect. The major buffer systems in the body are The interstitial fluid (bicarbonate, phosphates and proteins) Blood (bicarbonate, phosphates, hemoglobin and… Read More ›

Renal Regulation of Acid Base Balance

Renal regulation of acid base balance The kidney has two main functions in relation to maintaining the acid base balance of the body It reabsorbs filtered HCO–3 (4000-5000 mmol/day) It excretes fixed acids (1 mmol/kg/day) Renal mechanism works in two aspects; the PCT mechanisms and the DCT mechanisms   PCT mechanisms 1) Bicarbonate reabsorption Almost… Read More ›

Acid-Base Homeostasis In The Body

New Website The maintenance of a stable H+ concentration in all body fluids is essential for life. The H+ concentration, or pH is always maintained such that enzymatic activity and protein structure are at maximum efficiency {pH is the negative log of H+ concentration, pH = -log10[H+]} The disruption of this balance could cause severe… Read More ›

Normal ECG – Rate, Rhythm, Cardiac Axis, and Normal Waves & Intervals in an ECG

Visit our new website- This article discusses the rate, rhythm, cardiac axis, and normal waves & intervals in an ECG. Normal Waves in ECG P wave It is a small upward deflection representing atrial depolarization. It should be upright in leads I, II, aVF, and V2-V6 and inverted in aVR. P wave is normally… Read More ›

Homeostasis and the Body Systems

New Medical Blog Since all tissues and organs contribute to maintain homeostasis, all organ systems are directly or indirectly playing a role. Nervous system Working as the body’s primary control center, this control the activities of almost every other organ in the body. Autonomous nervous system stimulates/inhibits secretions from the hypothalamus It controls contractions of… Read More ›

Baroreceptor Mechanism

Visit our new website– Arterial blood pressure is normally regulated within a narrow range, with a mean arterial pressure typically ranging from 85 to 100 mmHg in adults. It is important to tightly control this pressure to ensure adequate blood flow to organs throughout the body. This is accomplished by negative feedback systems incorporating… Read More ›

Human Physiology and Homeostasis

Visit our new website– Human physiology is the branch of biological science that explains the specific characteristics and mechanisms of our body that help it to function as a living organism. Homeostasis is the process by which the body maintains its internal environment at optimum conditions to function as a living being Homeostasis: maintenance… Read More ›

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