Human Biology IIITake Home Portion of Final Exam

Spring 03

Water, Electrolytes, pH, Reproductive Systems & Embryologic Development

This assignment isdue Thursday May 29^th.

• For each question, please read the corresponding section in your text as well as one other source [there are A&P texts in the library, one on open & one on closed reserve], citing them at the end of each question [i.e. question #1 your answer here. Citations: A& P by Stephen, Seeley and Tate & Nutrition Now by Brown question # 2 your answer here. Citations: A& P by Stephen, Seeley and Tate & Human Physiology by Guyton, question #3 etc. You get the idea; I should be seeing the same textbook for each question. ] Your citations may include websites, or journal articles. If you use a journal article, include FULL bibliography. Failure to follow these directions [if you don’t understand them – ASK!] will reflect on your evaluation.

• All answers must be typed and include the original question at the beginning. 

• NO LATE PAPERS ACCEPTED. You are welcome to submit them early, or by email.

Questions:

• Zak is a thirsty guy, but he is stuck in traffic, and doesn’t have any fluids in his car. He pops a piece of gum in his mouth, and within minutes feels his dry and parched mouth relieved. Explain how dehydration stimulates thirst and why chewing gum works to relieve his dry mouth. What impact, if any, does it have on his dehydration status?

• Janelle ran the Capital City half marathon [13.1 miles] for the first time and is proud of her efforts. She maintained an 8:50 mile throughout the first 12.1 miles, with the last one clocked in at 8: 10! After she finished, she was sore and out of breath for quite awhile. a) What rehydration strategies should she use? [Be sure to include reasoning in relation to electrolytes] b) Discuss how the lactic acid in her muscles impacts her body’s pH and what systems are working [and how] to return her pH to prerace status. 

• Discuss the features of the female reproductive system that make it an inhospitable environment to sperm, and how seminal secretions maintain sperm viability within it.

• List 2 ways oogenesis differs from spermatogenesis.

• Explain the difference in terms of cleavage, growth, morphogenesis and differentiation as they apply to prenatal development.