The Circulatory and Respiratory Systems

Question 1

Kristen is running a half marathon. By her tenth minute of running, her breathing rate has increased from her resting rate.Which statement best describes how her tissues are responding to her running?

Revolt · Accepted Answer

They need more oxygen to function, so gas exchange needs to increase.

Question 2

Cells need oxygen to make energy. Oxygen-rich blood is transported to tissues. When the oxygen is dropped off, it needs to move through structures that are small and thin.Which vessels allow for oxygen movement into the tissues?

Revolt · Accepted Answer

capillaries

Question 3

Which best describes carbon dioxide’s path out of the body?

Revolt · Accepted Answer

alveoli → bronchus → trachea → larynx → pharynx → nose

Question 4

At the site of gas exchange in the lungs, where does the oxygen move?

Revolt · Accepted Answer

O2 moves from the alveoli to the red blood cells.

Question 5

Which is the next structure to contact air after it passes from the nose to the nasal cavity?

Revolt · Accepted Answer

the pharynx

Question 6

AtriaVentriclesValvesCapillaries

Revolt · Accepted Answer

Valves

Question 7

Which is located inside the lung?

Revolt · Accepted Answer

the alveoli

Question 8

The picture represents the respiratory system.

Revolt · Accepted Answer

the trachea

Question 9

Gerald is lightheaded and tired from a lack of oxygen in his tissues.What is most likely the reason he feels this way?

Revolt · Accepted Answer

His red blood cell count is low.

Question 10

Which component of blood allows oxygen from the air to move from the lungs to cells of the body?

Revolt · Accepted Answer

red blood cells

The Circulatory and Respiratory Systems Answers

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