TAMUK EX PHYS 2026 exam 3 chapter 7 & 8 | Questions with 100% Verified
Answers | Latest Update
Question: What are the three components of the circulatory system?
Answer:
Veins, arteries, and capillaries.
Question: What is the difference between systemic and pulmonary circuits?
Answer:
Systemic circuit carries oxygenated blood from the heart to the body, while pulmonary circuit carries
deoxygenated blood from the heart to the lungs.
Question: What are the four elements of intrinsic control of the heart?
Answer:
Sinoatrial node, atrioventricular node, bundle of His, and Purkinje fibers.
Question: What are the three elements of extrinsic control of the heart?
Answer:
Sympathetic nervous system, parasympathetic nervous system, and hormones.
Question: What does an electrocardiogram (ECG) measure?
Answer:
The electrical activity of the heart.
Question: What is the difference between systole and diastole?
Answer:
Systole is the contraction phase of the heart, while diastole is the relaxation phase.
Question: How do you calculate stroke volume?
Answer:
Stroke volume = End-diastolic volume - End-systolic volume.
Question: What is ejection fraction and how is it calculated?
Answer:
Ejection fraction = (Stroke volume / End-diastolic volume) x 100.
Question: What is cardiac output and how is it calculated?
Answer:
, Cardiac output = Heart rate x Stroke volume.
Question: What are the two factors influencing hemodynamics?
Answer:
Blood pressure and vascular resistance.
Question: What is pulmonary ventilation?
Answer:
The process of moving air in and out of the lungs.
Question: What happens during inspiration?
Answer:
The diaphragm contracts, increasing thoracic volume and decreasing pressure, allowing air to flow into
the lungs.
Question: What is the significance of the oxyhemoglobin dissociation curve?
Answer:
It shows how hemoglobin's affinity for oxygen changes with different factors, such as pH and
temperature.
Question: What is the Fick equation?
Answer:
VO2 = Q x (a-vO2 difference), where Q is cardiac output and (a-vO2 difference) is the difference in
oxygen content between arterial and venous blood.
Answers | Latest Update
Question: What are the three components of the circulatory system?
Answer:
Veins, arteries, and capillaries.
Question: What is the difference between systemic and pulmonary circuits?
Answer:
Systemic circuit carries oxygenated blood from the heart to the body, while pulmonary circuit carries
deoxygenated blood from the heart to the lungs.
Question: What are the four elements of intrinsic control of the heart?
Answer:
Sinoatrial node, atrioventricular node, bundle of His, and Purkinje fibers.
Question: What are the three elements of extrinsic control of the heart?
Answer:
Sympathetic nervous system, parasympathetic nervous system, and hormones.
Question: What does an electrocardiogram (ECG) measure?
Answer:
The electrical activity of the heart.
Question: What is the difference between systole and diastole?
Answer:
Systole is the contraction phase of the heart, while diastole is the relaxation phase.
Question: How do you calculate stroke volume?
Answer:
Stroke volume = End-diastolic volume - End-systolic volume.
Question: What is ejection fraction and how is it calculated?
Answer:
Ejection fraction = (Stroke volume / End-diastolic volume) x 100.
Question: What is cardiac output and how is it calculated?
Answer:
, Cardiac output = Heart rate x Stroke volume.
Question: What are the two factors influencing hemodynamics?
Answer:
Blood pressure and vascular resistance.
Question: What is pulmonary ventilation?
Answer:
The process of moving air in and out of the lungs.
Question: What happens during inspiration?
Answer:
The diaphragm contracts, increasing thoracic volume and decreasing pressure, allowing air to flow into
the lungs.
Question: What is the significance of the oxyhemoglobin dissociation curve?
Answer:
It shows how hemoglobin's affinity for oxygen changes with different factors, such as pH and
temperature.
Question: What is the Fick equation?
Answer:
VO2 = Q x (a-vO2 difference), where Q is cardiac output and (a-vO2 difference) is the difference in
oxygen content between arterial and venous blood.
