Anatomy Questions

Which of the following increases heart rate?A) cardioacceleratory center via sympathetic trunkB) cardioinhibitory center via the vagus nerveC) cardioinhibitory center via the sympathetic trunkD) cardioacceleratory center via the vagus nerve

Which of the following is NOT part of the intrinsic conduction system of the heart?A) atrioventricular (AV) nodeB) bundle branchesC) atrioventricular (AV) valveD) sinoatrial (SA) node

Blood that is being pumped into the systemic circuit comes from which chamber of the heart?A) right ventricleB) left ventricleC) left atriumD) right atrium

Which statement best describes arteries?A) only large arteries are lined with endotheliumB) all contain valves to prevent the backflow of bloodC) all carry oxygenated blood to the heartD) all carry blood away from the heart

The term for abnormally fast heart rate isA) tachycardiaB) pericarditisC) bradycardiaD) myocardial infarction

Which layer of the heart wall is the same as the visceral pericardium?A) endocardiumB) myocardiumC) parietal pericardiumD) epicardium

Which of the following processes provides a long-term response to changes in blood pressure?A) chemoreceptor-initiated reflexesB) neural controlsC) renal regulationD) baroreceptor-initiated reflexes

Each of the following describes the action of aldosterone except one. Which of the following does NOT describe the activity of aldosterone hormone?A) it will result in higher sodium levels in the urineB) it promotes an increase in blood pressureC) it will reduce urine outputD) it promotes an increase in sodium reabsorption from the kidney to the blood

Peripheral resistance __.A) increases as blood viscosity increasesB) decreases with increasing length of the blood vesselC) is not a major factor in blood pressure in healthy individualsD) increases as blood vessel diameter increases

Respiratory gases, which are lipid soluble molecules, cross the capillary walls byA) diffusing directly through endothelial membranesB) passing through cleftsC) active transport via vesiclesD) passing through fenestrations

The arteries that are also called distributing arteries which accounts for most named arteries are the __.A) arteriolesB) muscular arteriesC) capillariesD) elastic arteries

Select the correct statement about the heart valves.A) Aortic and pulmonary semilunar valves control the flow of blood into the heartB) The tricuspid valve divides the left atrium from the left ventricleC) The atrioventricular (AV) valves prevent backflow of blood into the atria during ventricular contractionD) The mitral (bicuspid) valve separates the right atrium from the right ventricle

Which of the following best describes the net flow of fluid at the capillaries?A) fluid flows in at the arterial and venous endsB) fluid flows out at the venous end and in at the arterial endC) fluid flows out at the venous and arterial endsD) fluid flows out at the arterial end and in at the venous end

Which of the following would have the least influence on blood pressure?A) cardiac outputB) blood volumeC) peripheral resistanceD) white blood cell count

The volume of blood flowing through vessels, organs, or the entire circulation in a given period describes:A) blood viscosityB) blood velocityC) blood pressureD) blood flow

Which of the following is NOT an intrinsic control of blood flow?A) hormonal controlB) myogenic controlsC) metabolic controlsD) autoregulation

Which vessel(s) of the heart receive(s) blood from the right ventricle?A) aortaB) pulmonary trunkC) venae cavaeD) pulmonary veins

Which of the following is a structure that holds cardiac cells together?A) gap junctionsB) valvesC) pericardiumD) desmosomes

The baroreceptors in the carotid sinus and aortic arch are sensitive to which of the following?A) a decrease in carbon dioxideB) changes in arterial pressureC) a decrease in oxygen levelsD) an increase in oxygen levels

Which of the following areas of the brain does NOT have an influence on blood pressure?A) cerebral cortexB) medulla oblongataC) thalamusD) hypothalamus