BIO 112 Exam 2 Reivew PLA

Front

What is the name of the valve between an atrium and ventricle?

Back

Atrioventricular valve: A valve that allows blood to flow from the atrium to the ventricle, preventing backflow.

Front

What occurs once an action potential is triggered?

Back

Rapid change in membrane potential: This is the quick shift in electrical charge across a neuron's membrane that occurs during an action potential.

Front

What determines whether O2 and CO2 undergo net diffusion into or out of capillaries?

Back

Concentration gradient: The difference in concentration of a substance across a space, driving the movement of molecules.

Front

What is the role of the sympathetic division of the autonomic nervous system?

Back

It prepares the body for 'fight or flight' responses, increasing heart rate and reducing saliva production.

Front

How do action potentials relay different intensities of information?

Back

Varying frequency of firing and strength of each individual action potential: The frequency of action potentials conveys the strength of a stimulus.

Front

What is the function of the aortic valve?

Back

The aortic valve prevents backflow of blood from the aorta into the left ventricle.

Front

What is the role of the pulmonary valve?

Back

The pulmonary valve prevents backflow of blood from the pulmonary artery into the right ventricle.

Front

Define action potential.

Back

An action potential is a rapid, temporary change in the membrane potential of a neuron, allowing for the transmission of electrical signals.

Front

What is a pressure gradient?

Back

A pressure gradient is the difference in pressure between two areas, influencing the movement of fluids.

Front

What is the function of the parasympathetic division of the autonomic nervous system?

Back

It promotes 'rest and digest' activities, slowing the heart rate and increasing digestive activities.