A closed circulatory system becomes an advantage when: (mark all that apply) there is a need for increased oxygen supply to muscles ever gills are no longer needed there is a need for decreased excretion of nitrogenous waste products or carbon dioxide

What is the effect of nitrates on: Preload Afterload Myocardial oxygen supply/demand ratio

In most mammals, mature erythrocytes lack what feature?A. HemoglobinB. A cell membraneC. The ability to bind oxygenD. A cell nucleus

Order the following in the correct sequence that reflexes are trasmitted through the nervous system:                                                                  brain stem integrates this and other information                                                                  low pH detected by chemoreceptors                                                                  affarent neuron sends signals to brain stem                                                                  efferent neuron travels to the lungs                                                                  breathing rate is increased

A sample of blood is obtained from a mammalian research specimen. It is determined that the erythrocytes have more carbon dioxide content than they do oxygen. Where was the specimen most likely obtained?  Group of answer choices The coronary arteries The left atrium The pulmonary arteries None of the above

The circulatory system is composed of. O the brain, the heart, and the blood vessels the heart, the brain, and the lungs. the heart, blood, and blood vessels. O the lungs, the blood, and the blood vessels.

I need help with a respiratory question, thanks In the fetal heart, the foramen ovale allows blood to flow between which two structures?   Right atrium to left ventricle. Right atrium to left atrium. Bypass the liver and enter the inferior vena cava. Pulmonary artery to aortic arch.   thanks

The fish's blood pressure is highest in which of the following vessels? sinus venosus O branchial arteries cardinal vein O ventral aorta dorsal aorta

14. Which option is correct

110) At the venous end of capillaries, the Net Hydrostatic Pressure is lower than the Net Osmotic Pressure Group of answer choices False True 111) When a container decreases in volume by one half, the pressure of the gas in that container increases by 2 Group of answer choices False True 112) Exercising will increase body heat and prevent oxygen from leaving hemoglobinGroup of answer choices False True 113) The amount of blood pushed out of each ventricle during each heartbeat is called _______________________________ Group of answer choices End-diastolic volume Stroke volume End-systolic volume Cardiac output