AP Biology Lab 10: Physiology of the Circulatory System

Mr. Anderson introduces AP Biology Lab 10, focusing on the physiology of the circulatory system. The lab has two parts: measuring human blood pressure and examining how temperature affects the respiration rate of goldfish. Blood pressure is measured using a sphygmomanometer and stethoscope, identifying systolic and diastolic pressures. The goldfish experiment demonstrates the relationship between temperature and respiration rate, highlighting the differences between ectotherms and endotherms.

What are the two main activities in this lab?

• Measuring blood pressure and heart rate

• Measuring blood pressure and studying the effect of temperature on goldfish

• Studying the effect of temperature on humans and goldfish

• Studying the effect of temperature on goldfish and daphnia

What device is used to measure blood pressure?

• Electrocardiogram

• Barometer

• Sphygmomanometer

• Thermometer

What does the systolic blood pressure represent?

• The pressure when the heart is at rest

• The pressure when the heart contracts

• The average blood pressure

• The lowest blood pressure

What might a very high blood pressure indicate?

• Low stress levels

• A recent meal

• A blockage in the blood vessels

• A healthy circulatory system

How does standing up affect blood pressure?

• It decreases blood pressure

• It has no effect on blood pressure

• It increases blood pressure

• It stabilizes blood pressure

What is the purpose of the operculum in goldfish?

• To assist in respiration

• To regulate body temperature

• To protect their eyes

• To help them swim

What happens to the respiration rate of goldfish as the temperature decreases?

• It increases

• It decreases

• It remains constant

• It fluctuates randomly

Why do ectotherms like goldfish have a changing respiration rate with temperature?

• They can regulate their body temperature internally

• Their body temperature is influenced by the environment

• They have a constant internal temperature

• They are unaffected by external temperature changes

What would happen to a goldfish if the temperature is increased too much?

• It would become more active

• It would die

• It would stop breathing

• It would maintain a constant respiration rate

How does the respiration rate of humans compare to that of goldfish when temperature changes?

• It remains relatively constant

• It increases significantly

• It fluctuates unpredictably

• It decreases significantly