Which of the following occurs first in human development?

Ovulation typically occurs around day 21 of a standard 28-day menstrual cycle.  

1. What are some special characteristics of sperm that help them function for fertilization? (4 points) 2. What is the process for sperm to penetrate the egg? (4 points) 3. What happens with the egg and sperm to block polyspermy from happening? Why must polyspermy be blocked? (4 points)

Human gestation normally lasts about 280 days from the first day of the last menstrual period.  

1. Discuss 2 common complications that may arise during pregnancy or labor. (2 points) 2. Explain how they affect both the mother and fetus. (4 points) 3. Explain the causes, risks, and potential treatments if possible. (4 points)

10.  (12 points) Write the complete balanced equation for the following reactions. Identify the type of reaction. (WCSP25.)   a. HNO3 (aq) +      Ba(OH)2 (aq) 

Copper was mixed with nitric acid (HNO3). Fizzing and bubbling occurred along with a color change from colorless to blue. The gaseous product was collected in a test tube and exposed to a glowing splint.  A loud pop was heard.  Identify the gas produced and indicate what observation would correspond to a different gas by making the following matches.

9.  You found a solution of 0.200 M AgNO3 in the lab.  You think you could make some money if you reduce the silver ions to silver metal according to the following reaction. (WCSP25.) 3 AgNO3 (aq)   +   Al (s) 

7.  A chromatography experiment was used to determine components in a mixture. a.  Calculate the Rf values for spot A and spot B using your ruler. Show your work. Use appropriate significant figures in your measurements and calculations.  (6 points, WCSP25.)    b. The stationary phase for the previous chromatogram was cellulose, which is highly polar due to the presence of multiple hydroxyl (OH) groups.  The mobile phase was water.  Given this, identify which amino acid (a building block for proteins) shown below corresponds to spot A and B.  Explain your reasoning. (6 points)   Enter the Rf value of spot A in the box below.

Which of the following would be an appropriate technique for edema management for this patient?