PQ Chapter 08 - The Cardiovascular and Respiratory Systems

At what point does the body start to accumulate lactate during exercise?

• Lactate threshold

• Anaerobic threshold

• Oxygen debt

• Lactate accumulation point

During a physical education class, Rohan was asked to perform a series of sprints. The difference between the oxygen required to perform these sprints and the oxygen actually consumed by Rohan before reaching a new steady state is known as the

• O2 deficit

• CO2 deficit

• a-vO2 diff

• OBLA

During a fitness test, Ella is trying to determine the maximal amount of O2 that can be taken in and used for the metabolic production of ATP while she exercises. What is this measurement known as?

• VO2max

• O2 uptake

• VCO2

• RER

Which tiny blood vessels facilitate the exchange of nutrients and waste products in the body?

• capillaries

• arteries

• veins

• venules

During a biology class, Chloe learns that as the diaphragm contracts, the thoracic cavity

• pulls downwards and enlarges

• tightens and shrinks

• remains fairly stationary and in place

• recoils to its original position

Which structures are part of the respiratory zone in the human lungs?

• alveolar sacs, alveolar ducts, and respiratory bronchioles

• larynx, trachea, and bronchi

• nasal cavity, pharynx, and larynx

• bronchi, bronchioles, and alveolar sacs

During physical activity, which organ's blood flow remains relatively constant?

• Heart

• Brain

• Liver

• Kidneys

Cardiac output is equal to which of the following?

• heart rate x stroke volume
• heart rate x breathing rate
• heart rate x aortic blood pressure
• resting heart rate

During a biology class, Eesha learned about a structure in the heart that is sometimes referred to as the heart’s “pacemaker.” What is this structure?

• the sinoatrial (SA) node

• the sinoventricular (SV) node

• the atriocardial (AC) node

• the atrioventricular (AV) node

Which blood vessel transports deoxygenated blood from the right ventricle to the lungs?

• pulmonary artery

• pulmonary vein

• superior vena cava

• inferior vena cava