Exam 23: Circulation and Respiration

Because of the changes in blood pressure through the circulatory system,the best way to feel a pulse is by pressing a finger against ________.

In animals with a closed circulatory system,gas exchange occurs across the thin walls of ________.

Which of the following would be considered support for the hypothesis tested by the scientists?

Which of the following best describes the pathway an oxygen molecule would take through the human circulatory system?

Which one of the following is a characteristic of open circulatory systems but NOT closed circulatory systems?

The structure where the respiratory and digestive systems meet expands during a yawn.What is the name of this structure?

How does a shark's cardiovascular system differ from that of a mammal?

Why is blood pressure higher during systole than during diastole?

The basic rhythm of the heartbeat is set by the ________.

When you hold your breath,which of the following blood gas changes leads initially to the urge to breathe again?

White blood cells play a particularly important role in ________.

Blood pressure is lowest in ________.

Animals such as hydras and jellies can exchange gases directly with the environment by ________.

The scientists investigated carbon dioxide levels in their experiment because high carbon dioxide levels in the ________ signal control centers in the brain to increase rate and depth of inhalations and exhalations.

Insects breathe using ________.

Blood pressure that is consistently ________ or higher would indicate that you have hypertension.

What path does a molecule of O₂ take from the nose to the respiratory surface?

If your blood pressure were 120/70,it would mean that ________.

You increase your risk of cardiovascular disease by reducing your consumption of ________.

When tissue lining a blood vessel is damaged,the first thing that happens is ________.