QUIZ OVER CH. 44
MAINTAINING HOMEOSTASIS
1. Homeostasis refers to an animal's ability to regulate it's _________ __________.
2. Asmoregulation refers to how animals regulate their solute balance and water content. (True or False?)
3. What is the difference between vasodilation and vasoconstriction?
4. Name 2 other ways thermoregulation can take place.
5. What is thermoregulation?
WATER BALANCE & WASTE DISPOSAL
1. Metabolic wastes must be excreted from the body. (True or false?)
2. Mammals have ___ (#) kidneys and each is supplied with a renal artery and a renal vein.
3. How does urine leave the kidney? (Hint: it drains into the urinary bladder)
4. Although, urine is expelled from the body through the ____________.
5. What are the 2 regions of the kidney called?
6. The Bowman's capsule is a ball of capillaries? (True or false?)
7.In the decending loop (Loop of Henle) water moves out by osmosis and H20 moves ACTIVELY or PASSIVELY?
8. Urine is filtered blood (True or False?)
9. Ultra Filtrate is NOT selective in the Bowman's capsule. (True or False?)
10. What are the 2 places that secrection can only happen?
11. Explain the importance of ADH. (Anti Diaretic Hormone)
ANSWERS:
HOMEOSTASIS SECTION:
1. internal environment
2. True
3. Vasodilation is an increase in diameter of blood vessels at the skin, which cools the blood. Vasoconstriction is the opposite of vasodilation; constriction of the blood vessels.
4. Thermoregulation can take place by a) ajusting the rate of heat exchange between and animal and it's environment or b) Evaporation across the skin (through panting or sweating) or c) behavioral responses (changes in location or posture) or d) alteration of the rate of metabolic heat production (only in endotherms)
5. Thermoregulation refers to how animals maintain their internal temperature
WATER & WASTE DISPOSAL SECTION:
1. True
2. 2 kidneys
3.Urine leaves the kidneys through the ureters
4. Urine is expelled from the body through the urethra.
5. The 2 regions of the kidney are called the outer cortex renal cortex and the inner renal cortex. These 2 regions are packed with nephrons, which are the functional untit of the kidney.
6. False, the glomerulus is a ball of capillaries. The Bowman's capsule is a C-shaped capsule that surrounds the glomerulus.
*I found this great video which reviews the urinary system but I can't figure out how to upload it so heres the web link: http://www.youtube.com/watch?v=qxb2_d9ilEw
7. Passively
8.True
9. True
10. The proximal and distal tubule are teh onyl places that secretion can happen
11. ADH is an important hormone in the regulation of water balance. It is produced in the hypothalmus and sotred in and released from the pituatary gland. 2 other hormones involved in regulation of water balance are angiotensin and aldosterone. ADH is always produced, not always released.
*To the right is the process of ADH (http://www.virtualcancercentre.com/uploads/VMC/DiseaseImages/600_SIADH.jpg)
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