Term 1 ToB wk 8

Question 1

Testosterone production is under the control of what hormone ?

Answer 1

pituitary lutenising hormone (LH)

Question 2

Process of spermatogenesis involves what ?

Answer 2

1. Multiplication phase
   * spermatogonia enter mitotic division to form primary spermatocyte
2. Growth phase
   * primary spermatocyte enters meiosis 1
   * secondary spermatocyte enters meiosis 2 to form spermatid
3. Maturation phase
   * spermatid undergoes spermiogenesis to form spermatozoa

Question 3

Give an overall idea of what happens in spermatogenesis ?

Answer 3

spermatogonia -> primary spermatocyte -> secondary spermatocyte -> spermatid -> spermatozoa

Question 4

Give an overall idea of what happens in Oogenesis process?

Answer 4

Oogonia -> primary oocyte -> secondary oocyte -> ovum

Question 5

What happens in foetal life, beginning of menstrual cycle, fertilisation of oogenesis process ?

Answer 5

1. Foetal life
   * Oogonia enter mitotic division to form primary oocyte
   * primary oocyte enters meiosis 1
   * primary oocytes arrest at prophase 1 stage of meiosis 1 until puberty
2. Beginning of menstrual cycle
   * primary oocyte becomes a secondary oocyte
   * secondary oocyte arrests at metaphase 2 of meiosis 2 until fertilisation occurs
3. Fertilisation
   * secondary oocyte undergoes completion of meiosis 2 to form an ovum