adolescence

Question 1

1. what is adolescene?
2. why is it called teen age

Answer 1

1. the period in which body goes under several changes, leading to reproductive matuarity.
2. the period covers age between 13 to 19. which is also called “teens”

Question 2

what is puberty? name the changes

Answer 2

the age at which sex hormones and sex gaments start to produce.
changes at puberty:
1. increase in height
2. change in body shape
3. change in voice
4. increase of sweat
5. development of sex organs
6. reaching mental, intellectual and emotional matuarity

Question 3

explain change in body shape

Answer 3

boys have broder shoulders and wider chests. thier muscules grow more prominetly than girls.
girls the region below the vaist becomes wider.

Question 4

explain voice change

Answer 4

growing voice box in boys can be seen as an extented part in throat called adam’s apple. girls generelly have a high pitched voice.

Question 5

name secondary sexual characters in boys

Answer 5

in boys:
1. appearence of moustache, beard and chest hair
2. growth of hair on genital area
3. body becomes more muscular
4. growth of voice box
5. tetes start producing sperms
6. increace in height
7. chest and shoulder broadens
8. heavier bone and skull structure

Question 6

name secondary sexual characters in girls

Answer 6

in girls:
2. growth of hair on genital area
3. development of breast
4. high piched voice
5. ovaries start producing eggs
7. hip broadens
8. mensturation cycle starts

Question 7

what are hormones?

Answer 7

1. chemical substance which codinate the daily activities of living organism
2. they are also called chemical messengers of the body
3. created by endorine gland

Question 8

name function and types of endocrine glands

Answer 8

releases hormones directly in blood streams. the part which the hormone reach is called target site.
types of endocrine glands:
1. pituitary
2. thyroid
3. adrenal
4. pancrease
5. ovaries
6. testes

Question 9

what is mensturation?

Answer 9

1. shedding of uterine lining on monthly basis.
2. begins at puberty and reproductive cycle starts in females.
3. every month, uterus is prepared for a egg and blood is supplied for nourisment of egg.
4. when the egg is not fertilized, then uterus lining breaks down and is released in form of blood through the vagina.
5. this lasts for 2 to 8 dyas and this scycle occurs every month and is known as mensturational cycle.
6. menarche is first mensturational flow and menopause is the stop of mensturation.

Question 10

boy or girl??

Answer 10

1. thread like struacture called chromosomes in fertilised egg.
2. there are total 23 pairs of chromosomes. two chromosomes are sex chromosomes (X AND Y).
3. female have both chromosomes of X and males have X AND Y chrmosomes.
4. unfertilised egg is always X but the sperm is has X AND Y
5. the egg which has two X chromosomes develope into girl and the egg which has X AND Y chromosomes develope into girl.

Question 11

endocrine glands name hormones they secreate

Answer 11

1. pituitary gland - thyroxine
2. adrenal gland - adrenalin
3. thyroid gland - thyroxin
4. testies - male hormone (testosterone)
5. ovaries - female hormone (orestrogen)
6. pancreass - insulin

Question 12

1. the change from larva to adults is called
2. what is controlled by _
3. which hormone controls in frog

Answer 12

1. metamorphosis
2. metamorphosis is controlled by insect hormones
3. thyroxine

Question 13

funtions of types of endocrine glands

Answer 13

1. pituitary gland - controls growth
2. adrenal gland - regulates BP, breathing and stress
3. thyroid gland - controls respiration and metabolism
4. testies - release of sperms and secondary character
5. ovaries - release of eggs and secondary character
6. pancrease - controle sugar level and prevents diabetes