B1 Key Terms and Definitions

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  • Created by: Chloe
  • Created on: 14-05-16 15:16
Callus
A ball of cells grown during tissue culture.
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Respiration
The breakdown of glucose in cells to produce carbon dioxide, water and energy.
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Photosynthesis
The synthesis of carbon dioxide and water using light to produce glucose and oxygen (process by green plants)
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Evolution
Changes in characteristics of species over time.
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Adaptation
A change in the body to fit an organisms location in order to enable it to survive in its environment.
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Gene
A small section of DNA in a chromosomes which codes for inherited characteristics.
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Chromosome
Long molecule of DNA containing genes. They are found in the nucleus of cells.
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DNA
Genetic material found in the nucleus of living cells. Chromosomes are made up of DNA and a gene is a section of a chromosome.
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Biomass
The total dry mass of a living material
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Nervous System
Carries sensory information and messages around the body
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Receptors
An organ or cell that is sensitive to a stimuli
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Stimulus
A change in the environment of an organism
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CNS
Central Nervous System: Brain and Spinal Chord
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Lamark
Said that adaptations occur within the lifetime of an organism. If a characteristic was used a lot then it would become more developed and could be passed on.
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Darwin
Came up with the theory of evolution by natural selection
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Reflex action
Doesn't require the brain. Used when an immediate response is required.
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Cholesterol
A fatty substance which can block blood flow. Treated with statins
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Deficiency Disease
A disease caused by a lack of an essential nutrient.
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Balanced Diet
A diet made up of a variety of different food groups, providing all the nutrients and energy needed to be healthy.
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Pathogen
A disease causing microorganism
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Decomposition
The process of where complex, multi-celled organisms, are broken down into simpler, single-celled organisms
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Metabolic rate
The rate at which chemical reactions occur in the body
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Semmelweiss
A Doctor who told other Doctors to wash their hands.
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Bacteria
A single-celled microorganism without a nucleus. They reproduce rapidly
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Virus
Viruses are non-living. They replicate inside living cells.
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Pathogen
A disease causing microorganism
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White Blood Cell
Produces antibodies, antitoxins, and memory cells in an immune response.
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Red Blood Cell
Carries blood and other substances around the body
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Toxin
A poison often produced by pathogens, which causes symptoms
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Symptom
A sign of disease or disorder
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Withdrawal symptoms
Symptoms produced when a person stops taking drugs since their bodies have become dependant on it.
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Immunity
Protected against a disease by the production of antibodies.
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Antibody
Produced by white blood cells during an immune response.
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Vaccine
Dead or weakened pathogens which are injected into the body.
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Penicillin
One group of antibiotics
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MRSA
A resistant bacteria to most antibiotics
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MMR
Measles, Mumps and Rubella. No proven link to Austin
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Auxin
A plant hormone. Can also be used as weed killer and rooting powder
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Thalidomide
Missed a stage in testing. Originally produced to treat sleep deprivation. Found to treat morning sickness. Caused babies to have undeveloped limbs. Now used to treat leprosy.
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Name two effectors
Glands: Produce hormones. Muscles: Contract and Relax
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Other cards in this set

Card 2

Front

The breakdown of glucose in cells to produce carbon dioxide, water and energy.

Back

Respiration

Card 3

Front

The synthesis of carbon dioxide and water using light to produce glucose and oxygen (process by green plants)

Back

Preview of the back of card 3

Card 4

Front

Changes in characteristics of species over time.

Back

Preview of the back of card 4

Card 5

Front

A change in the body to fit an organisms location in order to enable it to survive in its environment.

Back

Preview of the back of card 5
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