Ch 34 Circulatory System Flashcard

Front

What is the primary gas that increases in the blood when you hold your breath, leading to the urge to breathe?

Back

Rising CO2 levels.

Front

What hormone is responsible for increasing heart rate in response to stress or excitement?

Back

Epinephrine.

Front

How does pH change during exercise and what effect does it have on breathing rate?

Back

pH decreases, which causes breathing rate to increase.

Front

What is the main function of circulatory systems in relation to diffusion?

Back

They compensate for the slow rate at which diffusion occurs over large distances.

Front

What is the name of the fluid that circulates in the circulatory system of arthropods?

Back

Hemolymph.

Front

Define 'circulatory system'.

Back

A system that transports nutrients, gases, hormones, blood cells, and waste products throughout the body.

Front

What role does carbon dioxide play in regulating breathing?

Back

Increased levels of CO2 stimulate the urge to breathe.

Front

What is the effect of epinephrine on the cardiovascular system?

Back

It increases heart rate and blood flow to muscles.

Front

Explain the relationship between exercise and blood pH.

Back

During exercise, lactic acid builds up, lowering blood pH.

Front

What is hemolymph and its function in arthropods?

Back

Hemolymph is the fluid that fills the circulatory system of arthropods, serving a similar function to blood in vertebrates.