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Biology- Reproductio

Unit 15.5-15.9

QuestionAnswer
What takes place after the baby is born? Afterbirth
State a reason for some babies born prematurely? Early breaking of amnion around the fetus, the mother smokes/drink alcohol/take drugs during pregnancy
Explain passive immunity When the child/person receiving it will have them in their blood which they are unable to produce
Outline the ways which HIV can be prevented from spreading Use condoms for males during sexual intercourse,reduce the use of shared needles among drug users, care screening of blood used for transfusion
State the four hormones involved in the control of menstrual cycle Follicle stimulating horomone (FSH), Oestrogen,Luteinising horomone (LH), progesterone
Describe the roles of these hormones in controlling the menstrual cycle FSH: stimulates the follicles to develop in ovary + secretes oestrogen Oestrogen: Thickens the uterus lining, inhibits FSH production + secrete LH in the blood LH: Stimulates ovulation + remaining follicles to form yellow body Progesterone:maintain lin
What happens to the women at the age of 45-55 years? Menopause
State the possible effects of testosterone on boys Deepening of voice, muscle development, facial hair,testes start to make sperm,growth of male sex organs
When does a person become an adolescent? When puberty starts, around the age of 12-18
What can infertile women become pregnant? Regular injections of fertility drugs containing FSH to stimulate ovaries to release an egg
Which two methods of birth control that are irreversible? (one for females + another for males) Female: Sterlisation Males: Vasectomy
Give an example of another natural method of birth control besides the rhythm method Following symptoms of ovulation e.g. checking for an increase in body temperature and changed in cervical mucus. It becomes wetter and less sticky before ovulation
Explain how artificial insemination is carried out Semen is collected from the man and placed into the woman's uterus via a fine plastic tube. If the man does not produce enough sperm, then a donor may provide a sample of semen for artificial insemination
Give a disadvantage over artificial insemination The child may know who their biological father is
Besides HIV, what other types of sexual transmitted diseases are there? Gonorrhoea
True or False: AIDS is a disease False: it is a collection of diseases which result from weakening of body's immune system.
Describe the effects of HIV on the immune system HIV attacks T lymphocytes and alters its DNA so there it makes copies of the virus instead of itself. The virus burst out of the cell and continue to attack other lymphocytes. There are less antibodies produced = more likely to develop diseases
Created by: natalieng14
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