Answer:
It gives the body its shape, allows movement, makes blood cells, provides protection for organs
Answer:
Which two mechanisms influence the force of cardiac contraction?
Answer: End diastolic volume and sympathetic nervous system stimulation
Explanation:
Blood pressure decreases during diastole, which occurs when the heart muscle relaxes. While, blood pressure increases during systole, which occurs when the ventricles contract, pushing blood out of the right ventricle.
The cardiovascular system connects a pump to blood vessels.
Cardiac contraction is the end result of action potentials and it can be defined as a unique ability of cardiac muscle to generate a force that is independent of any load or stretch applied.
End-diastolic volume is the amount of blood in the ventricles just before systole. A person’s end-diastolic volume tends to decrease with age.
End-systolic volume is used in the hospital to determine a measurement known as stroke volume, which is the amount of blood pumped from the left ventricle with each heartbeat.
Sympathetic stimulation causes the release of the neurotransmitter norepinephrine and it increases heart rate and myocardial contractility.
The sympathetic nervous system has a wide variety of cardiovascular effects, among which are, increased cardiac contractility, peripheral vasoconstriction.
Sympathetic nervous system stimulation causes vasoconstriction of most blood vessels.
Answer:
If I were the president of the United States, I would improve the quality of people's lives by asking them for what they want; their opinion. I can also allow more trees to be grown in the land that isn't in use. This is so that we can breathe without inhaling toxic gases. Lastly, I would remove the use of guns because sometimes they can be used for the wrong purposes and are very dangerous to the public
Explanation:
Contracting the pathogen, causing the immune system to respond and fight off the pathogen causing it to create antibodies