Process
Eduqas A-Level Biology A400QS
Biological Molecules
Cell Structure and Organisation
Cell Membranes and Transport
Enzymes
Nucleic Acids and Their Functions
Importance of ATP
Photosynthesis
Respiration
Microbiology
Population Size and Ecosystems
Topic overviewPopulation growth and its measurementThe population growth curve and carrying capacityDensity dependent and density independent factorsSampling abundance and distributionEcosystems, habitats and communitiesEnergy transfer and pyramids of biomassSuccessionDecomposition and the carbon cycleThe nitrogen cycle and human interventionEutrophication and the effects of drainage
Human Impact on the Environment
Classification and Biodiversity
Topic overviewThe need for classification and the taxonomic hierarchyThe three domain and five kingdom systemsCharacteristic features of the five kingdomsAssessing relatedness by physical features and biochemistryThe species concept and the binomial systemBiodiversity, adaptation and natural selectionMeasuring biodiversity in a habitatGenetic and molecular measures of biodiversity
Mitosis and Meiosis
Sexual Reproduction in Humans
Sexual Reproduction in Plants
Inheritance
Variation and Evolution
Application of Reproduction and Genetics
Topic overviewThe Human Genome Project, other sequenced genomes and genomics in healthcareScreening embryos, stem cells and the ethical issuesGenetic fingerprinting, PCR and electrophoresis in forensic workRecombinant DNA and the production of human insulinGenetically modified crops and gene therapy
Adaptations for Gas Exchange
Topic overviewSurface area to volume ratio and gas exchange in small organismsSpecialised respiratory surfaces and the need for ventilationGills and counter current flow in bony fishThe human breathing system and its histologyVentilation and gas exchange in humansThe insect tracheal systemThe angiosperm leaf, stomata and gas exchange
Adaptations for Transport
Topic overviewVascular systems compared across animal groupsThe mammalian heart and blood vesselsThe cardiac cycle and its controlBlood, haemoglobin and dissociation curvesThe Bohr effect, chloride shift and tissue fluidThe root and the uptake of waterThe endodermis and the entry to the xylemXylem, transpiration and cohesion-tensionThe potometer and xerophytes and hydrophytesPhloem and translocation
Adaptations for Nutrition
Homeostasis and the Kidney
The Nervous System
Immunology and Disease: Disease and Its TransmissionImmunology
Immunology and Disease: AntibioticsImmunology
Immunology and Disease: The Immune ResponseImmunology
Human Musculoskeletal Anatomy: Skeletal TissuesMusculoskeletal
Topic overviewCartilage and its three typesThe composition and functions of compact boneBone remodelling and the Haversian systemRickets, osteomalacia, osteoporosis and brittle bone diseaseThe structure of skeletal muscleThe sliding filament theoryFast and slow twitch fibres, and energy for contraction
Human Musculoskeletal Anatomy: Structure and Function of the SkeletonMusculoskeletal
Human Musculoskeletal Anatomy: JointsMusculoskeletal
Neurobiology and Behaviour: The BrainNeurobiology
Neurobiology and Behaviour: NeuroscienceNeurobiology
Sexual Reproduction in Humans
- 5 subtopics
- 15 things to know
- Component 2
What Sexual Reproduction in Humans covers
Sexual Reproduction in Humans is examined in Component 2, Continuity of Life. It covers the reproductive systems and the histology of testis and ovary, spermatogenesis and oogenesis, Intercourse, fertilisation and implantation, the menstrual cycle and its hormonal control and the placenta, birth and lactation.
The 5 subtopics
Each one has its own page.
- The reproductive systems and the histology of testis and ovaryFunction of the interstitial cells of the testis, function of the epididymis and three glands that add fluid to semen.Open →
- Spermatogenesis and oogenesisOrder the cells formed during spermatogenesis, structure of a spermatozoon and function of the acrosome.Open →
- Intercourse, fertilisation and implantationHow an erection is produced, acrosome reaction and cortical reaction and explain why it matters.Open →
- The menstrual cycle and its hormonal controlTwo effects of follicle stimulating hormone, two effects of oestrogen on the uterus and why menstruation follows a fall in progesterone.Open →
- The placenta, birth and lactationFunction of human chorionic gonadotrophin, two hormones secreted by the placenta itself and positive feedback that operates during labour.Open →
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Why do the two bloods never mix at the placenta, what does cross it, and what triggers birth?
Key term
Name in order the ducts through which sperm pass from the testis to the outside.
Key term
Explain how an erection is produced.
Key term
Which gland secretes follicle stimulating hormone and luteinising hormone?
Key term
What is seen in a stained section of a testis under low power?
Key term
Define spermatogenesis.
Key term
Define ejaculation.
Key term
Which structure secretes oestrogen during the first half of the cycle?
Process
Which tissue secretes human chorionic gonadotrophin, and at what stage?
Key term
Name the cells within a seminiferous tubule that nourish and protect the developing sperm.
Key term
Name in order the cells formed during spermatogenesis.
Numbers
Roughly how many sperm are released in one ejaculation?
Key term
Explain what happens when oestrogen reaches a high concentration around day 12.
Key term
Describe the feature of the placenta that gives it a very large surface area.
Take Sexual Reproduction in Humans further
The same content, four other ways.
Questions from this topic
Each one with the model answer underneath.
- 1
Name in order the ducts through which sperm pass from the testis to the outside.
Model answer
The seminiferous tubules, the epididymis, the vas deferens and finally the urethra.
- 2
Where in the testis are spermatozoa produced?
Model answer
They are produced from the germinal epithelium lining the seminiferous tubules.
- 3
What is seen in a stained section of a testis under low power?
Model answer
Many roughly circular cross sections of seminiferous tubules, with small groups of interstitial cells filling the spaces between them.
- 4
Name the cells within a seminiferous tubule that nourish and protect the developing sperm.
Model answer
The Sertoli cells.
- 5
State the function of the interstitial cells of the testis.
Model answer
They secrete the hormone testosterone.
- 6
Why are the testes held outside the body cavity in the scrotum?
Model answer
Sperm develop properly only at a temperature a few degrees below the core temperature of the body.
What is inside Levo
Six ways to work the same material.
Sexual Reproduction in Humans revision questions
- What does Sexual Reproduction in Humans cover in Eduqas A-Level Biology?
- 5 subtopics: the reproductive systems and the histology of testis and ovary, spermatogenesis and oogenesis, intercourse, fertilisation and implantation, the menstrual cycle and its hormonal control and the placenta, birth and lactation. Each one has its own page with questions and model answers.
- How is Sexual Reproduction in Humans organised?
- By the Eduqas A400QS specification, subtopic by subtopic, so it matches the order you are taught it in.
Every question in Sexual Reproduction in Humans, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
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