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describe what does excretion mean?
the process that removes excess or harmful substances fron the body
where would you find ammonia in the body?
ammonia is formed in the kidneys
describe the primary funcations of urinary system?
its primary funcation is to help the body in homeostasis (maintain balance) by controlling the composition, volume and pressure of blood
functions of the kidneys
1. Removes of toxin and nitrogenous wastes
2. Chemical regulation and acid base balance
3. Maintaining water balance
4. Regulating blood pressure
Describe what is a nephron?
Nephron are tiny filtrations units, located in each kidney
Which of the following conditions are more acidic or alkaline?
Starvation - More acidic
Bacterial infection - More alkaline
Diabetes mellitus -More acidic
Vegetarian diet- More alkaline
Protein rich diet - More acidic
Explain the following the meaning: Inspiration, Expiration
Inspiration- During inspiration the muscles contract moving the rib cage upwards and outwards, the diagram contracts downwards to a more flatten position. Airflow into the lungs.
Expiration- during expiration the diaphragm and the muscles relax and air leaves the lungs
External respiration?
gases exchange of oxygen and carbon dioxide must occur between pulmonary blood and alveoli.
Internal respiratory
gas exchange must be made between the blood and tissue cells
Explain the transportation of oxygen?
oxygen mainly transports itself around blood by attaching to haemoglobin inside the red cells to form oxyhaeoglobin.
A very small amount of oxygen is carried dissolved in plasma.
Carbon dioxide is mainly transported in plasma of the blood.
Describe the following dieases and disorders
Diabetes insipidus
a rare disease cause by inadequate production of the anti- diuretic hormone.
Excessive quantities of dilute urine are produces and there is great thirst