37 Questions
Which of the following equations represents the cardiac output (CO)?
CO = SV x HR
Which of the following equations represents the stroke volume (SV)?
SV = EDV - ESV
Which of the following factors can increase the cardiac output (CO)?
Increased end diastolic volume (EDV)
Which of the following factors can increase the end diastolic volume (EDV)?
Increased filling time
Which of the following factors can increase the end systolic volume (ESV)?
Increased afterload
Which of the following factors can decrease the end diastolic volume (EDV)?
Decreased filling time
Which of the following factors can decrease the end systolic volume (ESV)?
Decreased contractility
Which node in the heart generates the action potential that initiates the contraction of the atria and serves as the pacemaker?
SA node
Which fibers in the heart are activated by the AV node and cause a bottom-up contraction of the ventricles?
Purkinje fibers
What is the major difference between a normal action potential and a cardiac action potential?
Calcium influx during repolarization
Which wave in an ECG corresponds to the electrical activity from the Purkinje fibers up, causing the ventricles to contract?
QRS complex
What does the 'Lub' sound heard during a blood pressure measurement represent?
Closing of AV valves
What does the 'Dub' sound heard during a blood pressure measurement represent?
Closing of semilunar valves
What does systolic pressure represent in a blood pressure reading?
Heart contracting
What does diastolic pressure represent in a blood pressure reading?
Heart relaxing
What is pulse pressure?
Difference between systolic and diastolic pressure
What is MAP (Mean Arterial Pressure)?
Average pressure of the heart
According to the famous tongue twister, how much wood can a woodchuck chuck if a woodchuck could chuck wood?
None of the above
What is the main purpose of the tongue twister?
To entertain with a difficult phrase
What does the phrase 'if a woodchuck could chuck wood' imply?
Woodchucks are capable of chucking wood
Which hormone is responsible for promoting red blood cell production?
EPO
Which hormone is released by the pituitary gland and regulates cortisol levels?
ACTH
Which hormone is responsible for increasing contraction during labor and lactation during breastfeeding?
Oxytocin
Which hormone is released by the pituitary gland and stimulates the thyroid gland?
TSH
Which hormone is responsible for regulating body weight and is released by 'fat cells'?
Leptin
Which hormone is responsible for lower blood pressure and targets the kidneys?
ANP
Which hormone is responsible for increasing blood pressure?
Angiotensin
Which hormone is responsible for controlling the level of calcium in the blood?
Calcitonin
Which hormone is released by the pancreas when blood sugars are high and stores sugar in the liver and muscles?
Insulin
Which hormone is released by the pancreas when blood sugars are low and releases sugars from the liver?
Glucagon
Which hormone is responsible for decreasing blood calcium levels by promoting calcium deposition into the bone?
Calcitonin
Which hormone is responsible for increasing blood calcium levels by releasing calcium from the bones?
Parathyroid hormone
Which hormone is released by the pineal gland and regulates sleep, and is influenced by light?
Melatonin
Which hormone is lipophilic and can cross the cell membrane?
Thyroid hormone
Which hormone is responsible for regulating metabolism?
Thyroid hormone
Which hormone is released by the pituitary gland and is regulated by TSH?
Thyroid hormone
Which hormone is released by the adrenal gland?
Testosterone
Test your knowledge of electrical conduction through the heart! This quiz will cover topics such as the sinoatrial (SA) node, atrioventricular (AV) node, and Purkinje fibers. Explore the major differences between normal action potentials and cardiac conduction.
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