Anatomy Questions
Explore questions in the Anatomy category that you can ask Spark.E!
Which of the following will slow the heart rate?excess calciumvagus nerve stimulationsympathetic nervesexercise
From what organs does the hepatic portal vein receive blood?right and left kidneysthe liverstomach, intestine, spleen, and pancreashypothalamus and anterior pituitary
What is the function of the heart valves?-regulates blood pressure in the chambers of the heart-synchronizes blood flow through chambers on each side of the heart-allows blood to flow from one chamber to the next-prevents backflow of blood
Through which valve will blood flow when leaving the right atrium?bicuspid valvetricuspid valveaortic semilunar valvepulmonary semilunar valve
Which type of vessel has a thick tunica media?capillaryveinarteryvenule
Which arteries carry oxygen-rich blood into the cranial cavity?internal carotid arteries and vertebral arteriescoronary and vertebral arteriesinternal and external carotid arteriesinternal carotid arteries and internal jugular veins
Which of these describes a fenestrated capillary?special capillary type with small pores found in tissue where absorption is importanttypical capillary type found in muscle, nerve tissue, and connective tissuespecial capillary type found in the liverunique capillary type that helps form the blood-brain barrier
Which vessel receives blood directly from the left ventricle?AortaCoronary arteryPulmonary trunkPulmonary vein
In fetal circulation, the __________ connects the pulmonary trunk to the aorta, allowing blood to bypass the nonfunctional fetal lungs.ductus arteriosusductus venosusforamen ovaleumbilical artery
Which of the following changes would produce the greatest change in total peripheral resistance?10% change in blood viscosity10% change in cardiac output10% change in vessel length10% change in vessel diameter
After ventricular contraction, the whole heart is briefly at rest and all the valves are closed. Which of the following statements best summarizes this phase of the cardiac cycle?Choose the best answer about phase 5 of the cardiac cycle.-Isovolumetric relaxation phase happens during ventricular diastole and the intraventricular pressure increases.-Isovolumetric relaxation phase happens during ventricular diastole and the intraventricular pressure decreases.-Isovolumetric relaxation phase happens during ventricular systole and the intraventricular pressure increases.-Isovolumetric relaxation phase happens during ventricular systole and the intraventricular pressure decreases.
Select all of the factors that increase peripheral resistance.VasoconstrictionIncreased blood viscosityAtherosclerosisDecreased sympathetic nervous system activity
Which electrical event does the T wave of an electrocardiogram (ECG) represent?Ventricular repolarizationVentricular depolarizationAtrial repolarizationAtrial depolarization
The product of the stroke volume and the heart rate is known as the __________.cardiac outputafterloadpreloadvenous return
Which of the following occurs during the ventricular systole phase of the cardiac cycle?The pressure in the ventricles is higher than the pressure in the aorta and pulmonary trunk.The pressure in the ventricles is lower than the pressure in the atria.The atrioventricular valves open, and the semilunar valves close.The atria contract while the ventricles relax.
The layer of the heart that actually contracts is the __________myocardiumpericardiumepicardiumendocardium
Select all of the true statements regarding arteries.Arteries transport blood away from the heart to the capillaries.Smooth muscle in the tunica media enables arteries to change vessel diameter.The lumen of all arteries contains oxygen-rich blood.The thin tunica intima of arteries permits exchange of substances between blood and body tissues.
Blood pressure would INCREASE as a result of a DECREASE in __________.blood volumecardiac outputblood vessel diameterblood viscosity
During atrial diastole, blood flows passively from the atria to fill their respective ventricles to prepare for systole. During atrial systole, atria contract completing ventricular filling. What is happening during these phases?Choose all that apply to phases 1 and 2 of the cardiac cycle.-Atria contract to force the remaining blood into the ventricles.-Atrioventricular (AV) valves are open.-Blood flows passively from veins through atria into ventricles.-Semilunar valves are open.-Pressure in both atria and ventricles is high.
The tiny mass of cells that forms the pacemaker of the heart is called the __________.sinoatrial (SA) nodeatrioventricular (AV) bundlePurkinje fibersatrioventricular (AV) node