Coronary and Respiratory Systems Flashcards
learn this dummy
The smallest vessels in the cardiovascular system responsible for the exchange of gases are?
D) Capillaries
Which of the following remains unaffected with respect to blood distribution during exercise?
A) the brain
B) the digestive system
C) the skeletal system
D) the muscular system
A) the brain
This structure in the heart is sometimes referred to as the heart’s “pacemaker.”
D) SA node
The lung capillaries receive deoxygenated blood from the:
A)pulmonary veins
B) Superior/Inferior vena cava
C)Aorta
D)pulmonary arteries
D) Pulmonary arteries
Cardiac output is equal to which of the following?
A) Heart rate x breathing
B) Heart rate x stroke volume
C) Heart rate x aortic blood pressure
D) Resting heart rate
B) Heart rate x stroke volume
The bicuspid (mitral) valve is located between the:
the left atrium and the left ventricle
The part of the Red Blood Cells that helps in the transport of O, and CO, is the:
C) Hemoglobin
What structure prevents the cuspid valves from being forced back into the atria?
B) chordae tendinae
Which of the following blood vessels drains the legs and lower body?
A) the pulmonary artery
B) the inferior vena cava
C) the aorta
D) the superior vena cava
B) the inferior vena cava
The maximal amount of O, that can be taken in and used for the metabolic production of ATP during exercise is known as:
VO2max
As the diaphragm contracts, the thoracic cavity:
pulls downwards and enlarges
Which of the following is a function of the respiratory system?
A) to regulate blood pH
B) to remove CO
C) to supply O2 to the blood
D) all of the above
D) all of the above
(to regulate blood pH, to remove CO from the blood,
to supply O2 to the blood)
Which of the following is a way in which CO, is transported in the blood?
D) all of the above
(dissolved in blood plasma, bound to hemoglobin molecule to form carbonatingohemoglobin, as biocarbonate ions)
Which of the following about gas exchange is false?
A) It occurs in the alveoli.
B)It occurs via passive diffusion of gases (e.g., from high to low concentration).
C)It occurs via active diffusion of gases (e.g., against the concentration gradient)
D) Oxygen moves in and carbon dioxide moves out of the tissues.
E) All of the above statements are false.
C) It occurs via active diffusion of gases (e.g., against the concentration gradient)
The difference between the oxygen required to perform a task and the oxygen actually consumed prior to reaching a new steady state is known as the:
B) O2 deficit
