Cytology

Question 1

Membranes (Plasmalemma) are amphiphilic:

Answer 1

Polar head and non polar tail

Question 2

Facultative dividers

Answer 2

cells that usually dont do mitosis, only when it is necessary
–> liver cells

Question 3

Interphase

Answer 3

No cell division
Three phases: S; M, G
M –> G1 Phase –> S –> G2 Phase
Terminally differentated cells g into G0 after M

Question 4

G1

Answer 4

Cell Differentiation

Gene transcription

Question 5

S

Answer 5

DNA replication

Question 6

G2

Answer 6

Preparation for mitotic division

Question 7

Sister chromatids

Answer 7

identical chromosomes resulting the S Phase

connected on centromere

Question 8

Kinetochore

Answer 8

attachment for microtubules of cell spindle

at the centromere

Question 9

Types of Stem cells

Answer 9

Totipotent
Multipotent
Unipotent

Question 10

Phases of Mitosis

Answer 10

Prophase: chromosomes coil, centrioles move to poles

Prometaphase: chromosomes attach to spindle

Metaphase: line up

Anaphase: Splitting, centrioles are pulled

Telophase: Chromosomes uncoil

Cytokinesis: Cleavaga furrow

Question 11

Steps of Meiosis

Answer 11

Prophase I: Crossing over –> Chiasma Formation
Metaphase I and Anaphase: first divisioj
Metaphase II: second division
Anaphase II and Telophase II: Chromatids go to poles

Question 12

Meiosis in males:

Answer 12

four cells develop into mature stermatozoon

Question 13

Meiosis in females

Answer 13

One Ovum and three polar bodies