Control & Communication
What is the function of a reflex arc?
Why would the predicted ratio of offspring be different from the actual ratio?
Because fertilisation is a random process
What is a Mutation?
A random change to genetic material/ DNA.
Where are Villi found?
Small Intestine
What is the blood vessel that supplies the heart muscle with oxygen?
Coronary Artery
What are the gaps between Neurons called?
Synapse
Name the two types of Variation.
Discrete and Continuous.
What factors can increase the rate of mutations?
Radiation.
What are the 2 structures found in a Villi?
Lacteal & Blood Capillary
Name the 4 blood vessels that carry blood away and into the heart.
Vena Cava, Aorta, Pulmonary Artery, Pulmonary Vein
What are the 3 parts of the brain?
Cerebrum/ Cerebellum/ Medulla
What is a gene?
A section of DNA that codes for a protein?
What are the only new source of alleles in a population?
Mutations.
What features of a Villi make them efficient at their role?
Thin walls, Extensive blood supply, Large surface area
What are the three blood vessels?
Artery, Vein, Capillary
Explain why only target tissues are affected by certain hormones?
They have receptor proteins which are SPECIFIC to its COMPLIMENTARY hormone
What is a Phenotype and a Genotype?
Phenotype- Physical Appearance
Genotype- The combination of Alleles.
Explain the process of Natural Selection.
A random change happens, if advantageous then those genes are passed down a generation.
What does a Lacteal absorb?
Fatty Acids & Glycerol
Which blood vessel contains valves? Why?
Veins, carries blood under low blood pressure.
Draw a fully labelled reflex arc
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What does heterozygous mean?
A genotype containing both a dominant and recessive allele.
What are the three types of Isolation barriers?
Ecological, Behavioural, Geographical
What does a Blood Capillary absorb?
Glucose and Amino Acids
Where is blood going/ come from in the Aorta?
Carries oxygenated blood from the left ventricle to the body.