Excretory+system+Worksheet+I

1.Some of these are not examples of homeostasis: (circle those that are not) a. Sweating, erection of hairs and capillary dilation/contraction to control the body temperature b.Adjusting the rate of breathing to remove carbon dioxide from the blood c. Production of concentrated or dilute urine to maintain the concentration of water and salts in the blood within a narrow range d.Blood clotting to prevent loss of blood e. Reproduction to produce the next generation f.The action of the hormone insulin to keep the level of glucose in the blood within a narrow range g.White cells engulfing bacteria h. Eating to supply the body with essential nutrients i.Sense organs that allow the animal to sense and then remove itself from unsafe conditions j. Various mechanisms to keep the pH of the blood within a narrow range

2. Add the following labels to the diagram below of the urinary system of a mammal.
 * kidney; bladder; ureters; urethra, renal artery and vein, caudal vena cava, sphincter**.

.-- These are functions of the kidney: (Circle 4) a. breaking down damaged blood cells b. controlling the concentration of water in the blood c. Removing urea from the blood d. Removing carbon dioxide from the bloode. Removing glucose from the blood f. Keeping the blood at the right pH (acidity/alkalinity) g. Digesting food h. Controlling the concentration of salts like sodium and potassium chloride in the blood

5. Match the organ with the function in the table below.
 * Kidney; cortex; ureter; bladder; renal vein; urethra; capsule; medulla; renal pelvis; renal artery; sphincter**
 * ~ Organ ||~ Function ||
 * ....................... || Carries urine from the bladder to the outside of the body ||
 * ....................... || Carries deoxygenated blood away from the kidney ||
 * ....................... || The inner region of the kidney ||
 * ......................... || Muscle that opens to allow urine to be removed from bladder ||
 * ......................... || The outer region of the kidney ||
 * .......................... || Carries oxygenated blood to the kidney ||
 * .......................... || The part of the kidney that collects the urine before it passes down the ureter ||
 * ........................... || The tough fibrous coat around the kidney ||
 * ........................... || Stores urine before it is removed from body ||
 * .......................... || The tube that carries urine away from the kidney ||
 * .......................... || Converts blood to urine ||

6. Add the following labels to the diagram of a kidney below. If you like you can also colour in the diagram as indicated. **:**
 * capsule- turquoise; renal artery – red; renal vein – blue; cortex - brown; medulla - pink; pelvis - yellow; ureter – green; pyramids - purple**

7. Add the following labels to the diagram below of a kidney tubule or nephron.
 * collecting duct; branch of renal artery; loop of Henle; distal convoluted tubule; glomerulus; proximal convoluted tubule; Bowman’s capsule**

8. Arrange these parts of the kidney tubule in the order in which the fluid that is being converted into urine passes through them.
 * collecting duct (CD);**
 * loop of Henle (LH);**
 * distal convoluted tubule (DCT);**
 * glomerulus (G);**
 * proximal convoluted tubule (PCT);**
 * Bowman’s capsule (BC)**

9. Indicate whether these parts of the kidney tubule are found in the cortex "C" or the medulla "M" of the kidney.

Bowman’s capsule C/MCollecting duct C/MProximal convoluted tubule C/MDistal convoluted tubule C/MGlomerulus C/MLoop of Henle C/M

10. Match the part of the kidney tubule with its function.
 * collecting duct; loop of Henle; distal convoluted tubule; glomerulus; proximal convoluted tubule; renal artery; Bowman’s capsule; Antidiuretic hormone or ADH**.
 * ~ Part of tubule ||~ Function ||
 * ........................... || Carries blood to the kidney ||
 * ............................ || The hormone that is involved in producing concentrated urine ||
 * ............................. || Cup shaped structure through which the fluid part of the blood is filtered ||
 * ............................. || Where the majority of water is extracted from the urine ||
 * ............................. || Looped portion of the tubule. Important for helping concentrate the urine ||
 * ............................. || Where hydrogen and potassium ions are secreted into the urine ||
 * .............................. || Glucose, salts, water and amino acids are reabsorbed into the blood capillaries here ||
 * .............................. || Tuft of capillaries carrying high pressure blood ||

11. Circle the substances in the list below that are **NOT** found in the fluid that has filtered through into the Bowman’s capsule of a healthy animal?
 * water;**
 * sodium chloride**
 * red blood cells**
 * glucose;**
 * amino acids;**
 * proteins;**
 * urea;**
 * white blood cells**