PB - Mistakes

Where does trypsin work best in the body?

The small intestines

What is the path of blood from the heart of a fish back to the heart of a fish?

Gills → muscles → heart

What is the effect of the toxin that Cholera produces?

It causes water from the blood to enter the gut

When volume of the lungs increases what happens to the diaphragm?

The diaphragm relaxes

What does a pyramid of energy in a food chain show?

The energy stored at each trophic level

What is the last process of genetic modification involving bacteria?

The expression of the human gene in the bacteria

What are the two advantages of using a pyramid of energy compared to a pyramid of biomass?

Shows a more accurate representation of energy transfer and allows for better comparison between ecosystems

What is the response of the pupil reacting to light called?

A pupil reflex

What is the type of action called when one muscles relaxes so the other can contract?

Antagonistic action

How do neurotransmitters move across a synaptic gap?

Through diffusion from a high concentration to a low concentration

What is the gamete cell of a pollen called?

The male nucleus

What are three reasons for a plant to self-pollinate?

It may be isolated, there would be an increased chance of fertilisation or there may be a lack of bees (pollinators)

What are the three effects of self-pollination?

Less genetic variation, less resistance to diseases and an increased risk of extinction chance

What is the definition for the term excretion?

The removal of waste products of metabolism and substances that are in excess

What are the two processes that occur in the liver concerning amino acids?

Deamination and assimilation

How does the base sequence of DNA control a cells function?

The DNA determines the sequence of amino acids, these amino acids then form certain types of protein such as insulin

What does auxin stimulate in plant cells?

Cell elongation