Answer:
Sperm washing is the process in which individual sperms are separated from the semen. Washed sperm is used in artificial insemination using the intrauterine insemination (IUI) technique and in in vitro fertilization (IVF). It may also be used to decrease the risk of HIV transmission by an HIV-positive male, in which case the washed sperm is injected into a female using an artificial insemination technique.
Sperm washing involves removing any mucus and non-motile sperm in the semen to improve the chances of fertilization and to extract certain disease-carrying material in the semen. Sperm washing is a standard procedure in infertility treatment.
Explanation:
Sperm washing takes place in a laboratory following sperm donation.
Sperm may be washed by density gradient centrifugation or by a "direct swim-up" technique that does not involve centrifugation. In normal semen samples, centrifugation causes no more DNA damage to spermatozoa than a direct swim-up technique.[1]
Washed sperm is concentrated in Hams F10 media without L-glutamine, warmed to 37 °C (99 °F).[2] A chemical known as a cryoprotectant is added to the sperm to aid the freezing and thawing process.[3] Further chemicals may be added which separate the most active sperm in the sample, as well as extend or dilute the sample so that vials for a number of inseminations are produced.
The answer is C. influenza, chicken pox, and colds because influenza, chicken pox, and colds (called rhinovirus) are all caused by viruses. Food poisoning is not a virus, athlete's foot is a fungal infection, and strep throat is a bacterial infection.
your answer is B. it is difficult to see physical and cognitive defects.
Answer:
The best answer to the question: According to Schwalbe, in "Finding Out How the Social World Works", an empirical question is one that can be:___, is: All of the other choices are correct.
Explanation:
"Finding Out How The Social World Works" is an excerpt from the book that was written by Michael Schwalbe in 1998 called "The Sociologically Examined Life: Pieces of the Conversation". On page 35, after the title: "The Kinds of Questions we Can Ask", Schwalbe himself explains about what an empirical question would be and how through it knowledge can be obtained. But he also makes emphasis on how these questions can be properly phrased so that they do lead to propet knowledge acquisition and he explains that empirical questions feed from measuring, counting and observation as well. This is why the answer is the last one.
The answer is D.
The leading cause of death for teens is Motor Vehicles accidents.
According to CDC, six teens die every day from a motor vehicle related accidents. teens only represents about 14 % of the population in the U.S, but we're accounted for 30 % of motor vehicles related accidents
