This document outlines the content and schedule for a senior biology class at Colegio Las Cumbres. Over three trimesters, the class will cover topics including human physiology, genetics, plant structure and function, ecosystems, and conservation. In the first trimester, students will learn about excretion, the nervous system, homeostasis, reproduction and development. The second trimester focuses on genetics, photosynthesis, plant transport and reproduction. In the third trimester, content includes food webs, biogeochemical cycles, human impacts on the environment, population growth, and conservation efforts.

1. Colegio Las Cumbres
Nivel Medio - secundaria@lascumbres.edu.ar
Esquema de Contenidos para el Período de Orientación, evaluación y promoción- cierre
ASIGNATURA: Biology
CURSO: Senior 4
PROFESOR/A: Ma. Magdalena Ravagnan
Contenido Nodal Sub-temas incluidos en el contenido nodal
Human physiology
- Excretion and the kidneys. Osmorregulation
-Nervous system: neurons, arc reflex, antagonistic muscles. The
eye: structures and functions
-Endocrine system: hormones. The pancreas. Adrenal glands. Feedback
- Homeostasis: definition. - The skin and temperature control.
- Drugs: definition. Depressants and stimulants Antibiotics. Effects of
heroin, alcohol and tobacco.
- Sexual y asexual reproduction.
-Male reproductive system: structures and functions
-Female reproductive system: structure. Menstrual cycle. Fertilisation.
Implantation. Placenta. Birth labour. Parental care.
-Sexual hormones: Testosterone, progesterone and oestrogen. Secondary
sexual characteristics.
- Family planning. Birth control.
- Sexual transmitted diseases: AIDS, gonorrhoea: Causes. Symptoms and
sigs. Effects. Treatment and control.
1° Trimestre
The continuity of life
and
Flowering plants
- Genetics : Mitosis and meiosis. Chromosomes. Patterns of heredity.
Determination of sex. Hereditary diseases: sickle cell anaemia, cystic
fibrosis. Variation:continuous and discontinuous. Mutation.
Plant structure and function
- Photosynthesis and nutrition in plants: gaseous exchange
- Transport in plants: transport of water (transpiration) and food
(translocation).
2° Trimestre
Diciembre 2014

2. Organisms and their
environment
Reproduction in plants:
a- Sexual: flower structure. Wind and insect -pollinated flowers.
Fertilization and fruit formation. Dispersal of fruits and seeds (wind and
animal). Seed structure. Germination.
b- Asexual: bulbs (onion) and tubers (potato)
- Coordination in plants: tropisms
Ecosystem
Food chains and food webs: pyramids of numbers and biomass. Recycling-
Energy flow in an ecosystem.
- Carbon and water cycles.
- Human impact on the environment:
- Water pollution: eutrophication. Sewage.
- Air pollution: The greenhouse effect. Acid rain.
- Agriculture: fertilizers and pesticides. Soil erosion.
- Deforestation
- Populations: population growth. Limits. Human population.
- Conservation: extinction. Conservation of species, genes, habitats and
non-renewable resources.
3° Trimestre