Gr 9 NATURAL SCIENCES: CH 1.3 SUM Systems in the Human Body: Circulatory and Respiratory System

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Questions and Answers

What is the primary function of the uterus?

  • To store and release eggs
  • To produce female sex hormones
  • To house and nourish a fertilized egg until it develops into a fetus (correct)
  • To connect the ovaries to the oviducts

What happens to the uterine lining if fertilization does not occur?

  • It becomes rich in blood vessels to prepare for pregnancy
  • It sheds during menstruation (correct)
  • It thickens further to prepare for implantation
  • It remains the same, waiting for the next ovulation

What is the main purpose of ovulation?

  • To release a mature egg from one of the ovaries (correct)
  • To produce female sex hormones
  • To prepare the uterus for potential implantation
  • To release sperm into the Fallopian tube

What is the journey of sperm during fertilization?

<p>Through the cervix, into the uterus, and towards the oviducts (C)</p> Signup and view all the answers

What occurs during the process of fertilization?

<p>The sperm penetrates the outer membrane of the egg (A)</p> Signup and view all the answers

What is the primary function of the placenta?

<p>To provide nutrients and oxygen to the embryo (C)</p> Signup and view all the answers

How long does human pregnancy typically last?

<p>About 40 weeks (C)</p> Signup and view all the answers

What is the process called when the uterus begins to contract during pregnancy?

<p>Labor (A)</p> Signup and view all the answers

What is the purpose of the oviducts (Fallopian tubes)?

<p>To connect the ovaries to the uterus (A)</p> Signup and view all the answers

What is the result of the sperm fertilizing the egg?

<p>The formation of a zygote (A)</p> Signup and view all the answers

What percentage of heterosexual couples is affected by infertility?

<p>10% (B)</p> Signup and view all the answers

What is the main cause of Foetal Alcohol Syndrome?

<p>Consumption of alcohol during pregnancy (A)</p> Signup and view all the answers

Which of the following is NOT a Sexually Transmitted Disease (STD)?

<p>Cancer (D)</p> Signup and view all the answers

After how many months of regular, unprotected intercourse is a couple considered infertile?

<p>12 months (B)</p> Signup and view all the answers

What are the consequences of Foetal Alcohol Syndrome for the child?

<p>Lifelong physical, behavioral, and cognitive impairments (A)</p> Signup and view all the answers

Why is understanding reproductive health important?

<p>To recognize potential health issues (C)</p> Signup and view all the answers

What can be a consequence of Sexually Transmitted Diseases (STDs)?

<p>Severe health consequences and affected fertility (A)</p> Signup and view all the answers

How can Foetal Alcohol Syndrome be prevented?

<p>By avoiding alcohol during pregnancy (D)</p> Signup and view all the answers

What is infertility a result of?

<p>Various factors in both men and women (C)</p> Signup and view all the answers

Why is reproductive health important?

<p>To recognize potential health issues and the complexities involved in human reproduction (C)</p> Signup and view all the answers

What is the primary purpose of puberty?

<p>To produce gametes (D)</p> Signup and view all the answers

What triggers the development of secondary sexual characteristics in females?

<p>The release of oestrogen (A)</p> Signup and view all the answers

What is the primary function of the pituitary gland in puberty?

<p>To release hormones that trigger puberty (D)</p> Signup and view all the answers

What is the result of the fusion of sex cells during reproduction?

<p>The creation of a new individual (B)</p> Signup and view all the answers

What is the primary function of reproduction in humans?

<p>To ensure the continuation of the species (C)</p> Signup and view all the answers

What is the role of the ovaries in females during puberty?

<p>To produce oestrogen (C)</p> Signup and view all the answers

What is the result of puberty in females?

<p>The development of reproductive organs (B)</p> Signup and view all the answers

What is the primary function of testosterone in males during puberty?

<p>To stimulate the development of secondary sexual characteristics (C)</p> Signup and view all the answers

What is the primary characteristic of primary sexual characteristics?

<p>They are directly related to reproduction (C)</p> Signup and view all the answers

What is the result of the release of hormones from the pituitary gland during puberty?

<p>The stimulation of immature sex organs (A)</p> Signup and view all the answers

What marks the onset of the menstrual cycle?

<p>The ability to ovulate and potentially conceive (C)</p> Signup and view all the answers

What is the primary function of the pituitary gland in relation to puberty?

<p>Releasing hormones that stimulate the gonads (A)</p> Signup and view all the answers

What is the primary function of the testes in males?

<p>Producing sperm and the hormone testosterone (D)</p> Signup and view all the answers

What is the purpose of the scrotum?

<p>To regulate the temperature of the testes (C)</p> Signup and view all the answers

What is the function of the vas deferens?

<p>To transport mature sperm to the urethra (C)</p> Signup and view all the answers

What is the purpose of the urethra in males?

<p>To carry both urine and semen (D)</p> Signup and view all the answers

What is the function of the vagina in females?

<p>To serve as the receptacle for the penis during sexual intercourse (D)</p> Signup and view all the answers

What is the primary function of oestrogen in females?

<p>To develop female secondary sexual characteristics (B)</p> Signup and view all the answers

What is the primary function of testosterone in males?

<p>To develop male secondary sexual characteristics (A)</p> Signup and view all the answers

What is the purpose of the uterus in females?

<p>To support the development of a fetus (B)</p> Signup and view all the answers

What is the ultimate reason for the existence of reproduction in humans?

<p>To ensure the continuation of the species (A)</p> Signup and view all the answers

What triggers the development of secondary sexual characteristics in males?

<p>The release of testosterone (D)</p> Signup and view all the answers

What is the primary purpose of breast development in females during puberty?

<p>To prepare the body for potential breastfeeding in the future (B)</p> Signup and view all the answers

What is the role of the pituitary gland during puberty?

<p>To stimulate the release of hormones from the ovaries and testes (D)</p> Signup and view all the answers

What is the primary function of the ovaries in the female reproductive system?

<p>To produce female sex hormones and release eggs (A)</p> Signup and view all the answers

What happens to the uterine lining during ovulation?

<p>It thickens and prepares for potential implantation (A)</p> Signup and view all the answers

What is the primary difference between primary and secondary sexual characteristics?

<p>Primary characteristics are directly related to reproduction, while secondary characteristics are not (C)</p> Signup and view all the answers

What is the result of the fusion of sex cells during reproduction?

<p>The creation of a new individual (C)</p> Signup and view all the answers

Where does fertilization of the egg by sperm typically occur?

<p>In the oviducts (Fallopian tubes) (B)</p> Signup and view all the answers

What is the role of oestrogen in females during puberty?

<p>To develop secondary sexual characteristics (D)</p> Signup and view all the answers

What is the result of fertilization of the egg by sperm?

<p>A zygote is formed (D)</p> Signup and view all the answers

What is the purpose of the oviducts (Fallopian tubes)?

<p>To connect the ovaries to the uterus (D)</p> Signup and view all the answers

What marks the beginning of puberty?

<p>The release of hormones from the pituitary gland (B)</p> Signup and view all the answers

What is the primary function of gametes during reproduction?

<p>To fuse and create a new individual (B)</p> Signup and view all the answers

What happens to the zygote after fertilization?

<p>It travels to the uterus and implants (D)</p> Signup and view all the answers

What is the purpose of the placenta and umbilical cord?

<p>To provide nutrients and oxygen to the embryo (C)</p> Signup and view all the answers

What is the purpose of testosterone in males during puberty?

<p>To develop secondary sexual characteristics (D)</p> Signup and view all the answers

How long does human pregnancy typically last?

<p>40 weeks (9 months) (C)</p> Signup and view all the answers

What triggers labor and birth?

<p>The uterus begins to contract (B)</p> Signup and view all the answers

What is the result of successful implantation of a fertilized egg?

<p>Pregnancy begins (C)</p> Signup and view all the answers

What is the primary function of the male reproductive system?

<p>To produce, maintain, and transport sperm and protective fluid (D)</p> Signup and view all the answers

Which hormone is responsible for the development of male secondary sexual characteristics?

<p>Testosterone (D)</p> Signup and view all the answers

What is the purpose of the scrotum in the male reproductive system?

<p>To regulate the temperature of the testes (C)</p> Signup and view all the answers

What is the primary function of the female reproductive system?

<p>To produce ova and facilitate fertilization (C)</p> Signup and view all the answers

Which hormone is responsible for the development of female secondary sexual characteristics?

<p>Oestrogen (C)</p> Signup and view all the answers

What marks the onset of puberty in females?

<p>The onset of the menstrual cycle (A)</p> Signup and view all the answers

What is the role of the pituitary gland in puberty?

<p>To release hormones that stimulate the gonads (C)</p> Signup and view all the answers

What is the result of increased levels of testosterone in males?

<p>The development of male secondary sexual characteristics (D)</p> Signup and view all the answers

What is the result of increased levels of oestrogen in females?

<p>The development of female secondary sexual characteristics (A)</p> Signup and view all the answers

What is the purpose of the vas deferens in the male reproductive system?

<p>To transport mature sperm from the epididymis to the urethra (C)</p> Signup and view all the answers

What is the approximate percentage of heterosexual couples affected by infertility?

<p>10% (B)</p> Signup and view all the answers

What is the primary cause of Foetal Alcohol Syndrome?

<p>Consumption of alcohol during pregnancy (A)</p> Signup and view all the answers

Which of the following STDs can have severe health consequences and affect fertility?

<p>All of the above (D)</p> Signup and view all the answers

What is the result of consuming alcohol during pregnancy?

<p>Foetal Alcohol Syndrome (C)</p> Signup and view all the answers

What can be a consequence of Sexually Transmitted Diseases (STDs)?

<p>Infertility (A)</p> Signup and view all the answers

How long does a couple need to try to conceive before being considered infertile?

<p>1 year (B)</p> Signup and view all the answers

What is the primary effect of Foetal Alcohol Syndrome on the child?

<p>All of the above (D)</p> Signup and view all the answers

Why is understanding reproductive health important?

<p>To understand the complexities involved in human reproduction (C)</p> Signup and view all the answers

What are the consequences of Sexually Transmitted Diseases (STDs) for fertility?

<p>Infertility (A)</p> Signup and view all the answers

What is the result of infertility in a couple?

<p>Inability to conceive (A)</p> Signup and view all the answers

What is the primary function of the gonads in puberty?

<p>To produce sex cells for reproduction (B)</p> Signup and view all the answers

What is the role of the larynx in male puberty?

<p>To cause the voice to deepen (C)</p> Signup and view all the answers

What is the primary function of the scrotum in males?

<p>To regulate the temperature of the testes (A)</p> Signup and view all the answers

What is the result of increased oestrogen levels in females during puberty?

<p>A widening of the hips and the development of a more rounded body shape (B)</p> Signup and view all the answers

What is the primary function of the epididymis in males?

<p>To store mature sperm (D)</p> Signup and view all the answers

What is the primary function of the foreskin in males?

<p>To protect the head of the penis (B)</p> Signup and view all the answers

What is the primary function of the vas deferens in males?

<p>To transport mature sperm to the urethra (D)</p> Signup and view all the answers

What is the result of increased testosterone levels in males during puberty?

<p>The development of male secondary sexual characteristics (D)</p> Signup and view all the answers

What is the primary function of the urethra in males?

<p>To transport both urine and semen (D)</p> Signup and view all the answers

What is the primary function of the vagina in females?

<p>To function as a birth canal and receptacle for the penis (B)</p> Signup and view all the answers

What is a common consequence of Foetal Alcohol Syndrome for the affected child?

<p>Lifelong physical, behavioral, and cognitive impairments (B)</p> Signup and view all the answers

What is a primary cause of infertility in both men and women?

<p>Various factors (A)</p> Signup and view all the answers

Which of the following is NOT a consequence of Sexually Transmitted Diseases (STDs)?

<p>Enhanced reproductive health (D)</p> Signup and view all the answers

What is the primary reason understanding reproductive health is important?

<p>To recognize the complexities involved in human reproduction (A)</p> Signup and view all the answers

What is a common method of transmission of Sexually Transmitted Diseases (STDs)?

<p>During sexual intercourse (C)</p> Signup and view all the answers

What percentage of heterosexual couples is affected by infertility?

<p>10% (B)</p> Signup and view all the answers

What is a major health consequence of Foetal Alcohol Syndrome?

<p>Lifelong cognitive and behavioral impairments (C)</p> Signup and view all the answers

What is a primary reason for the importance of reproductive health?

<p>To recognize the health issues related to reproduction (A)</p> Signup and view all the answers

What is a consequence of consuming alcohol during pregnancy?

<p>Foetal Alcohol Syndrome (A)</p> Signup and view all the answers

Why is it essential to understand reproductive health?

<p>To understand the health issues related to reproduction (B)</p> Signup and view all the answers

What is the primary purpose of the production of gametes in humans?

<p>To ensure the continuation of the species (C)</p> Signup and view all the answers

What is the primary function of the pituitary gland during puberty?

<p>To release hormones that trigger the production of sex cells (C)</p> Signup and view all the answers

What is the result of the release of hormones from the pituitary gland during puberty?

<p>The stimulation of the immature sex organs (A)</p> Signup and view all the answers

What is the primary difference between primary and secondary sexual characteristics?

<p>Primary characteristics are directly related to reproduction, while secondary characteristics are not (D)</p> Signup and view all the answers

What is the primary function of oestrogen in females during puberty?

<p>To develop the reproductive organs (D)</p> Signup and view all the answers

What is the primary function of testosterone in males during puberty?

<p>To trigger the development of secondary sexual characteristics (D)</p> Signup and view all the answers

What is the primary purpose of breast development in females during puberty?

<p>To prepare the body for potential breastfeeding in the future (A)</p> Signup and view all the answers

What is the role of the ovaries in females during puberty?

<p>To produce gametes (D)</p> Signup and view all the answers

What is the primary function of the testes in males during puberty?

<p>To stimulate the production of gametes (B)</p> Signup and view all the answers

What is the ultimate reason for the existence of reproduction in humans?

<p>To ensure the continuation of the species (B)</p> Signup and view all the answers

What is the primary function of the endometrium?

<p>To thicken and prepare for potential pregnancy (C)</p> Signup and view all the answers

Which part of the oviduct plays a crucial role in fertilization?

<p>The outer part (B)</p> Signup and view all the answers

What is the result of the egg's surface changing after fertilization?

<p>The egg is prevented from further sperm penetration (B)</p> Signup and view all the answers

What is the primary function of the umbilical cord?

<p>To facilitate the exchange of nutrients and oxygen (B)</p> Signup and view all the answers

During which stage of pregnancy does the embryo develop into a fetus?

<p>Gestation (D)</p> Signup and view all the answers

What is the primary function of the ovaries in the female reproductive system?

<p>To store and release eggs (D)</p> Signup and view all the answers

What is the result of the thickened uterine lining not being shed during pregnancy?

<p>The embryo implants into the lining (A)</p> Signup and view all the answers

What is the primary function of the female reproductive cycle?

<p>To prepare the body for potential pregnancy (B)</p> Signup and view all the answers

What is the primary site of fertilization of the egg by sperm?

<p>The oviduct (A)</p> Signup and view all the answers

What is the primary function of the embryo during gestation?

<p>To divide and grow (A)</p> Signup and view all the answers

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