Question

1 for questions (a) to (c), use options i - iv below.
i) voice box deepens and facial hair starts to grow.
ii) production of sex cells.
iii) hair starts to grow in the pubic region and armpits.
iv) breasts enlarge and hips broaden.
(a) which of the changes above occur only in girls during puberty
(b) which of the changes above occur only in boys during puberty?
(c) which of the changes above occur in both boys and girls during puberty?
2 explain what happens at each stage of the menstrual cycle by filling in the blanks below.
days 1 - 5
if ____________ does not occur, the uterine lining breaks down and __________ occurs. menstrual flow includes the shedding of the unfertilized egg, uterine lining, and ____________.
days 6 - 9
the uterine lining begins to ____________ to prepare the uterus for ____________ of embryo.
days 10 - 15
also known as the ____________ period because there is a high chance that sexual intercourse during this time will result in a __________. on one of these days, __________ will likely take place, where a mature ovum is released from the __________ into the ____________.

Explanation:

Step1: Identify puberty - related changes for girls

Girls during puberty experience breast enlargement and hip - broadening. So for (a), the answer is IV.

Step2: Identify puberty - related changes for boys

Boys during puberty experience voice - box deepening and facial hair growth. So for (b), the answer is I.

Step3: Identify puberty - related changes for both

Both boys and girls during puberty experience hair growth in the pubic region and armpits. So for (c), the answer is III.

Step4: Fill in the blanks for menstrual cycle (Days 1 - 5)

If fertilization does not occur, the uterine lining breaks down and menstruation occurs. Menstrual flow includes the shedding of the unfertilized egg, uterine lining, and blood.

Step5: Fill in the blanks for menstrual cycle (Days 6 - 9)

The uterine lining begins to thicken to prepare the uterus for implantation of embryo.

Step6: Fill in the blanks for menstrual cycle (Days 10 - 15)

Also known as the fertile period because there is a high chance that sexual intercourse during this time will result in a pregnancy. On one of these days, ovulation will likely take place, where a mature ovum is released from the ovary into the fallopian tube.

Answer:

(a) IV
(b) I
(c) III
Days 1 - 5: fertilization, menstruation, blood
Days 6 - 9: thicken, implantation
Days 10 - 15: fertile, pregnancy, ovulation, ovary, fallopian tube