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Which of the following is recruited and activated in response to the accumulation of ssDNA?

Which of the following is correct concerning substrates that ATM and ATR phosphorylate?

Male Reproduction 1) Diagram or explain the hypothalamic-pituitary gonadal axis in males- include cell types and all hormones involved and 2) what give two roles testosterone plays in regulating spermatogenesis. 1) Explain or diagram the process of spermatogenesis (Not the cycle or wave and use proper terms) starting with A0 spermatogonia to spermatozoa. 2) A young apparent heathy male enters the IVF clinic because of poor fertility for a sperm count and morphology exam. Results show that both count, and morphology were well outside of the normal range. The individual self-reported difficult seeing in low light and you notice dry scaly skin and you order a vitamin A test. Why did you order this test and how does this vitamin affect spermatogenesis? 1) Define the cycle and wave of the seminiferous epithelium. 2) It takes approximately 35 days for a mouse spermatozoon to develop from an A1 spermatogonium until spermiation.  How many days does it take to complete one cycle? 1) List 3 major epithelial cell types of the epididymis and provide at least one function for each cell type and 2) briefly discuss how sperm acquire mobility and the capacity to bind to the oocyte within the epididymis.

All known human diseases associated with defective DNA damage responses lead to an increased risk of developing cancer. True or False?

ATM, ATR and DNA-PKcs have similar domain structures, including HEAT repeats and a FAT domain. True or False?

The diaphragm is a muscle located: Best choice

What is the purpose of the nasal cavity in respiration?

The respiratory infection that affects the most people each year is the  _________________________.​

____________________ facilitates the release of energy stored in nutrient molecules.​

Drugs are used to control the HIV virus by blocking ______________________________.​