Spermatogenesis/Oogenesis

Question 1

Detail the order of differentiation of male germ cells.

Answer 1

Spermatogonium
Spermatocyte
Spermatid
Spermatozoon

Question 2

Where does spermatogenesis take place?

Answer 2

Seminiferous tubules

Question 3

What is spermiogenesis?

Answer 3

Maturation process- loss of cytoplasmic contents and gain of acrosomal cap to form mature spermatozoon

Question 4

How long does spermatogenesis take?

Answer 4

64 days

Question 5

Detail the ploidy and number of chromatids for each stage of spermatogenesis.

Answer 5

Spermatogonium (2N,2C)
Primary spermatocyte (2N,4C)
Secondary spermatocyte (1N, 2C)
Spermatid (1N,1C)
Spermatozoon (1N,1C)

Question 6

When does reduction/division occur in spermatogenesis?

Answer 6

Meiosis I (primary to secondary spermatocyte)

Question 7

Detail the order of differentiation of female germ cells.

Answer 7

Oogonium
Primary oocyte
Secondary oocyte
Ovum

Question 8

Primary oocytes begin meiosis 1 during fetal life. When do they complete meiosis 1?

Answer 8

Just prior to ovulation

Question 9

At what point in meiosis 1 are primary oocytes arrested?

Answer 9

Prophase

Question 10

The secondary oocyte is arrested in metaphase 2 until what event?

Answer 10

Fertilization

Question 11

What is Mittelschmerz?

Answer 11

Pain associated with ovulation (often peritoneal irritation)

Question 12

Where and when does fertilization occur?

Answer 12

Fallopian tube

Within 1 day of ovulation

Question 13

When does implantation of an embryo occur?

Answer 13

6 days after fertilization

Question 14

What cells secrete hCG?

Answer 14

Syncytiotrophoblasts

Question 15

What is the function of hCG?

Answer 15

Maintains corpus luteum

Corpus luteum secretes progesterone