Cardiovascular & Respiratory Quiz

Identify the valve, name of structure, & oxygenation status of the blood (e.g. oxygenated or deoxygenated).

• Tricuspid valve, R/L pulmonary arteries, deoxygenated blood.

• Pulmonary semilunar valve, R/L pulmonary arteries, deoxygenated blood.

• Pulmonary semilunar valve, R/L pulmonary veins, deoxygenated blood.

• Aortic semilunar valve, R/L pulmonary arteries, oxygenated blood.

In order to meet the increased oxygen demands of muscle during exercise, two major adjustments in blood flow must be made: 

• An increase in cardiac output and redistribution of blood flow from inactive tissues to skeletal muscles.

• An increase in blood flow to both the gut and brain.

• An increase in muscle blood flow and an increase in blood flow to the liver.

• An increase in heart rate and diastolic blood pressure.

Tags

NGSS.HS-LS1-3

NGSS.HS-LS1-7

In a healthy heart (during rest) the time spent in systole is generally 

• Longer than diastole.

• Equal to diastole.

• Shorter than diastole.

• Three times longer than diastole.

An increase in parasympathetic outflow to the heart results in 

• An increase in HR.

• A small increase in arterial blood pressure.

• A small increases in arterial blood pressure followed by an increase in HR.

• A Decrease in HR.

Tags

NGSS.HS-LS1-3

Most of the increase in mean arterial blood pressure that occurs during dynamic (isotonic) incremental exercise is due to 

• an increase in diastolic blood pressure.

• the increase in systolic blood pressure.

• both an increase in diastolic and systolic blood pressure.

• None of the above are correct.

The term ventilation refers to the

• cooling of the airways by respiration.

• mechanical process of moving air in and out of the lungs.

• oxygenation of blood as it travels through the lungs.

• random movement of molecules from an area of high concentration to an area of lower concentration.

Exercise-induced hypoxemia that often occurs in elite endurance athletes during heavy exercise is likely due to

• impaired alveolar ventilation resulting in hypoventilation.

• chronic obstructive lung disease.

• Asthma.

• a diffusion limitation secondary to a rapid red blood cell transit time.

The central chemoreceptors that influence the control of breathing respond to changes in the

• PCO₂ and H⁺ of cerebral spinal fluid.

• H⁺ of mixed venous blood.

• PO₂, pH, and PCO₂ of arterial blood.

• PCO₂ and H⁺ of mixed venous blood.

Tags

NGSS.HS-LS1-3

An increase in blood temperature and a decrease in blood pH would result in _____________ in the oxyhemoglobin dissociation curve.

• A leftward shift

• No change in

• Rightward shift

• None of the above answers are

Tags

NGSS.HS-LS1-3

Which of the following statements about myoglobin are true?

• myoglobin binds oxygen.

• myoglobin shuttles oxygen from the cell membrane to the mitochondria.

• myoglobin exists in relatively large quantities in slow-twitch muscle fibers.

• All of the above answers are correct.