Bio 322 Final Exam Questions and Answers| Already Passed

If Claire has a hematocrit of 24 and a plasma glucose concentration of 80 mg/dl, how much glucose does she have in her plasma? 96 mg Calculate the amount of K+ in plasma. Assume that the hematocrit is 50 and that there are 5 L of blood in your patient. The MW of K+ is 35 g/mol. 12.5 mmol During the flu season and during allergy season some physicians recommend using a nasal rinse. These solutions are made with a buffer to regulate pH, and are hyper-tonic. Why would rinsing mucous membranes in your nose help to reduce symptoms like a runny nose? A hyper-tonic solution shrinks cells in the nasal membranes and reduce symptoms. What are the main neurotransmitters for the sympathetic and parasympathetic nervous systems? Sympathetic = fight or flight = epinephrine. Parasympathetic =rest and digest = acetylcholine. Where is an interstitial cell in males and what does it do? It is located in the wall of the seminiferous tubule and it secrets testosterone. What is a nurse cell in males? These cells surround and support developing spermatocytes in the wall of the seminiferous tubules. Where does a spermatozoon develop and how does it leave the body? Spermatids develop throughout life in the testes and epididymis. Sperm move through the ductus deferens (vas deferens), and leave the body via the urethra. Isotonic saline contains 150 mM NaCl. What is the concentration of Na+ and Cl- in this solution? Na+ = 150 mM and Cl- = 150 mM What is meiosis and mitosis? Meiosis is called a reduction division since it reduces the number of chromosomes. It occurs during production of gametes. Mitosis is part of the process of somatic cell division. What is the blood testes barrier? It is formed by nurse cells and it isolates the seminiferous tubules from the general circulation. The decline in levels of progesterone and estrogen that accompany degeneration of the corpus luteum Results in menses or destruction of the functional zone of the endometrium.