The maintenance of normal volume and composition of extracellular and intracellular fluids is vital to life. List and briefly describe the kinds of homeostasis involved
What will be an ideal response?
Three types of homeostasis are involved: fluid balance, electrolyte balance, and acid-base balance. Fluid balance means that the total quantity of body water remains almost constant and that the distribution between the intracellular fluid and extracellular fluid are normal. Electrolyte balance implies the same thing for ions. Acid-base balance means that the pH of the extracellular fluid is maintained in the range of 7.35 to 7.45, and that gains or losses of hydrogen ion as a consequence of metabolism are followed by equivalent losses or gains so as to maintain constant buffer reserves.
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A condition in which bones lose bone mass and therefore become weak is
A. osteomyelitis. B. osteomalacia. C. osteoporosis. D. osteogenesis.
What is the common goal of the nervous and endocrine systems?
A) To send electrical impulses throughout the body. B) To send chemical messengers though the bloodstream to the cells of the body. C) To coordinate and regulate the activities of other cells, tissues, organs, and organ systems. D) To increase cellular reactions in all the cells, tissues, organs, and organ systems of the body. E) To transport gases, regulate pH, and control fluid volumes in the body.
In a contracted muscle, the A bands narrow because the length of the myosin myofilaments changes.
Answer the following statement true (T) or false (F)
Depends on oxygen delivery and aerobic mechanisms
A) Fast (oxidative or glycolytic), fatigable fibers B) Slow (oxidative), fatigue-resistant fibers