Term
| What are the two kinds of mammal reproduction |
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Definition
1. Monotremes - Oviparous (egg laying)
2. Therians - Viviparous (live birth) by means of placenta |
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Term
| What are the two types of placenta and their gestation period |
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Definition
1. Chorioallantoic placenta (Placentals) - longer gestation, fairly well developed young
2. Chiorvitelline Placenta (Marsupials) - Brief gestation, underdeveloped young |
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Term
| Importance of Trophoblast |
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Definition
| -stops immunological rejection by producing hormones allows longer gestation (in marsupials only blastocyst membranes protect embryo results in shorter gestation) |
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Term
| Homeothermic vs. pokilothermic |
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Definition
-Homeothermic - mammals body temp with little fluction
-Pokilothermic - Fish, many reptiles variable temp |
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Term
| Deep Diving - Respiratory and Circulatory changes |
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Definition
-Lungs collapse
-Alveoli empty
-Oxygen stored in muscles and blood vs. lungs
-higher blood volume
-higher myoglobin
-Bradycardia (slowed heart rate)
-Redistribution of blood to tissues |
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Term
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Definition
| -Blood filtered through nephrons and nitrogenous wastes removed |
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Term
| Nephron - Functional unit with 3 processes |
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Definition
1. Filtration-occurs as blood pressure forces
fluid from the blood in the glomerulus into
Bowman’s capsule (filtrate= plasma - proteins)
2. Reabsorption- occurs in the proximal tubule,
loop of Henle, distal tubule, movement from tubule into blood (active transport , osmosis, diffusion) - H20, H, NaCl, HCO3
3. Secretion- occurs in the proximal & distal tubule, movement from blood to tubule (same transport) - H, K |
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