Animal Excretory System
Biology ⇒ Animal Biology
Animal Excretory System starts at 9 and continues till grade 12.
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Describe how the excretory system helps maintain homeostasis in animals.
Describe the process of ultrafiltration in the nephron.
Describe the role of antidiuretic hormone (ADH) in the excretory system.
Describe the role of the loop of Henle in the nephron.
A desert animal produces very concentrated urine. Explain the physiological adaptations in its excretory system that allow this, and why these adaptations are important for survival in its environment.
A patient has a damaged glomerulus in the kidney. Predict and explain the possible effects on urine composition and overall body health.
A marine fish lives in a salty environment and tends to lose water by osmosis. Describe two adaptations in its excretory system that help it maintain water balance.
A certain animal excretes nitrogenous waste primarily as urea, has nephridia as its excretory organs, and lives in moist soil. Identify the animal and explain why this form of excretion is advantageous for its habitat.
Which of the following animals excretes ammonia directly?
(1) Birds
(2) Mammals
(3) Freshwater fish
(4) Reptiles
Which of the following animals uses flame cells for excretion?
(1) Flatworms
(2) Earthworms
(3) Insects
(4) Mammals
Which of the following is a correct sequence of urine formation?
(1) Filtration → Reabsorption → Secretion
(2) Secretion → Filtration → Reabsorption
(3) Reabsorption → Filtration → Secretion
(4) Filtration → Secretion → Reabsorption
Which of the following is a function of the liver in excretion?
(1) Producing bile
(2) Converting ammonia to urea
(3) Filtering blood
(4) Storing urine
Fill in the blank: Insects excrete nitrogenous waste mainly in the form of __________.
Fill in the blank: The excretory organ in crustaceans is called the __________ gland.
Fill in the blank: The process by which water and useful substances are taken back into the blood from the filtrate is called __________.
Fill in the blank: The process of maintaining a constant internal environment in the body is called __________.
True or False: Malpighian tubules are excretory organs found in insects.
True or False: The excretory system is only responsible for removing solid wastes from the body.
True or False: The process of removing metabolic wastes from the body is called excretion.
True or False: The skin is involved in excretion by removing excess salts and water through sweat.
