Thursday, February 13, 2020

Human production Assignment Example | Topics and Well Written Essays - 1000 words

Human production - Assignment Example At puberty, the kiss1 gene activates GPR54 gene which then activates hypothalamus to produce GnRH (gonadotropin-releasing hormone); a hormone that stimulates pituitary gland to produce hormones that affect testicles and ovaries. In males, testosterone is produced that affects the development of testes and penis along with the development of secondary sexual characteristics. In females, estradiol is produced by ovaries and it brings about the development of reproductive system and secondary sexual characteristics. An additional effect is the onset of menarche. 6. Spermatogenesis may be divided into three phases: spermatocytogenesis which is a proliferative phase; meiosis which produced cells containing half number of chromosomes and spermiogenesis (mitosis allows division of spermatogonia and they develop into primary spermatocytes and during Meiosis 2 secondary spermatocytes are produced) in which spermatozoa are produced. Seminiferous tubules allow spermatozoa a channel to pass through. Spermiogenesis comes to an end when spermatozoa are released from sertoli cells. Androgen (testosterone) is produced by Leydig cells. 7. Sperms are produced within seminiferous tubules from where they migrate to epididymis. They are stored here until maturation. During ejaculation, the sperm travel from epididymis to vas deferens, the ampulla. At this point other secretions are added to the sperms and the mixture is then propelled towards the ejaculatory duct and then while passing through urethra prostrate gland’s secretions is added. The combination of all these products is now known as semen which takes on a milky color; a secretion that is then expelled out of the body. Uterus is made up of layers of smooth muscle and it is hollow from within. It consists of an isthmus, cervix, fundus and a body. During menstruation, the inner lining show growth of tissue; preparation of the uterus for implantation if

Saturday, February 1, 2020

Background about the public higher education in the Arabic Gulf State Essay

Background about the public higher education in the Arabic Gulf State Sadi Arabia , Qatar , UAE - Essay Example iversity for Petroleum and Minerals in 1963, King Abdul-Aziz University in 1967, Um Al-Qura University in 1967, Imam Muhammad Bin Saud Islamic University in 1974, and King Faisal University in 1975 (Alamri 2011, p88). The increase in the number of universities necessitated the establishment of the Ministry of Higher Education in Saudi Arabia. Saudi Arabia’s higher education has undergone significant growth in the last 10 years. The higher education system has developed to include 18 government universities, 18 primary teacher’s colleges for men, 80 primary teacher’s colleges for women, 37 colleges, and institutes for health, 12 technical colleges, and 33 private colleges and universities. It is important to note that number of private universities in increasing constantly (Alamri 2011, p89). The Saudi Arabia Ministry of Education has put much emphasis on the development of higher education system. The ministry began an initiative to prepare a contemporary and a long-term plan for higher education. This will enable Saudi Arabia to fulfil most of the challenges in the creation of a sustainable academic process (AAFAQ 2005, p1). Saudi Arabia’s government sponsored human resources development has led to exponential growth in the quality and quantity of education. The number of students (male and female) in general and higher education phases have multiplied ten folds, from approximately 547, 000 students in 1970 to over 5.37 students in the year 2005. The persistent emphasis on human resources in the socio-economic development strategy has increased the quantity of students in higher education from 7, 000 in 1970 to approximately 604, 000 students in 2005. In other words, since the year 1970, the number of students multiplied by 86 times. In 2005, 58 percent of the students enrolled were female, while the other 42 percent was male. The number of female students enrolled at the bachelor level were 327, 500 (a representation of 64.7% of the undergraduates). The