Paper 1 Flashcards
What is the function of the nucleus?
Controls the activity of the cells and encloses genetic info
What are the advantages of an electron microscope?
Greater magnification
Higher resolution
What is the equation for magnification?
Magnification= size of image÷ real size of object
What type of pathogen causes malaria
Protist
Suggest reasons for a reduced number of deaths from malaria
Better healcare
Vaccine
Stopped mosquitos from breeding
What things defend the body from pathogens?
Skin Stomach Mucus Eyes Immune system, white blood cells(engulfs) Antibodies Antitoxins
Whats the word equation for photosynthesis
Carbon dioxide +water ——–> glucose+ oxygen
Whats one way an experiment can be improved
Repeating experiment and finding the mean
How is the volume of water lost from the leaves controlled?
Gaurd cells opening and closing the stomata
Describe the transport of water through a plant from the roots to the atmosphere
Water is transported in xyelm
Water evaporates from leaves through the stomata
Name one component of blood that starts the process of blood clotting
Platelets
Which part of the blood transports glucose?
Plasma
Define the term double circulatory system
Right side of the heart pumps blood to the lungs
Left side of the heart pumps blood around the body
Why is having one ventricle less efficient than having two
Oxygenated and deoxygenated blood mixes so less oxyegn reaches the body
What type of cell divides when new gill of a fish grows
Stem cells
Name one comdition that could be treated using regenerated human tissue
Paralysis
Diabetesa
What is an enzyme
A catalyst which speads up chemicap reactions
What organs in the digestive system produce carbohydrates
Pancreas
Small intestine
Salivary gland
What is a placebo trial used for
To stop patients thinking that theyre feeling better with the drug
What is a double blind trial used for
To avoid bias
What is the equation for aerobic respiration
Glucose+ oxygen —–> carbon dioxide + water
What is the equation for anaerobic respiration
Glucose ——> lactic acid+ energy
Why cant antobiotics treat viruses
Because viruses cannot be killed by antibodies
Whats the difference between communicable and non communicable diseases
Communicable diseases are spead for pathogens and non communicable arent
