Question

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URINARY SYSTEM IN HUMAN The main excretory system in humans is the urinary system. The skin also acts as an organ of excretion by removing water and small amounts of urea and salts (as sweat). The urinary system includes a pair of bean-shaped kidneys located in the back of the abdominal cavity. Each day, the kidneys filter about 180 litre of blood, enough to fill a bathtub. They remove urea, toxins, medications, and excess ions and form urine. The kidneys also balance water and salts as well as acids and bases. At the same time, they return needed substances to the blood. Of the total liquid processed, about 1.5 litre leaves the body as urine daily. Each kidney contains over one million nephrons, each of which consists of a tuft of capillaries surrounded by a capsule on top of a curving tube. The tuft of capillaries is called a glomerulus. Its capsule is cup-shaped and is known as Bowman's capsule. The glomerulus and Bowman's capsule form the top of a tube, the renal tubule. Blood vessels surround the renal tubule, and urine forms in it. The renal tubules of many nephrons join in collecting tubules, which in turn merge into larger tubes and empty their urine into the ureters in the renal sinus. The ureters exit the kidney at the hilus.

Question is....
Q1. What is the process of excretion? Q 2. The filtration units of kidney are called- (a) Ureter (b) Urethra (c) Neuron (d) Nephron Q 3.A red coloured tubular network surrounds the urine forming tubule. If blood filtration has already occurred at glomerulus level, then what could be the function of this network? a. Reabsorption of sodium b. Reabsorption of water c. Reabsorption of urea d. Reabsorption of food nutrients i) a, d ii) b, d iii) a, c, d iv) a, b, d Q 4. Encircle Yes or No for each statement - (a) Blood is filtered at glomerulus. Yes/No (b) The renal medulla is composed of tissue called renal pyramids. Yes/No Q 5.Excretory materials are basically metabolic wastes that are produced during different types of reactions in the body.What factors influence urinary elimination?
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Answer 1

Answer:

1. the process of removal of waste from the body is called excretion.

2. d) nephrons

3. option (iii) is correct (a, b, d)

4.

a) yes

b) yes

5.Psychological factors: Such as stress, fear, anxiety and emotional factors. Pathologic conditions: Such as fever, diabetes, infection of the urinary tract.

Explanation:

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Answer 2

Answer:

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