Which of the following is an example of negative feedback in the human body?
Outline the events that occur at a chemical synapse after an action potential arrives at the presynaptic terminal.
What is the approximate percentage of energy transferred from one trophic level to the next in an ecosystem?
Describe the role of the sodium-potassium pump in maintaining the resting membrane potential of a neuron.
What causes the depolarization phase of an action potential?
People with the inherited disease hemophilia have a deficiency in one of the proteins that act as clotting factors in blood.
A family has a history of hemophilia that is caused by a sex-linked recessive allele. A woman from this family is a carrier and marries a man who does not have the allele. Showing your working, determine the probability of their children having the disease.
Explain how blood clotting occurs and the consequence for a person who has hemophilia.
Outline how a protein is made in a cell by the process of translation.
On the graph, which curve represents the change in FSH levels during the menstrual cycle?
Define a catalyst and describe how enzymes act as biological catalysts.
Define denaturation and explain the causes of denaturation using the graph showing temperature's effect on enzyme activity.
Explain how food conversion ratios in livestock affect the amount of food for human consumption.
