Decreasing vascular decreasing cardiac will decrease blood pressure. or Dilation; contractions Diameter; output Constriction; relaxation Resistance; output

Cycling is a form of exercise known to increase the heart rate. For cycling, four incline levels typically determine how much more intense you would like the workout to be. Level one is a walking pace, two is slightly more difficult, three is like cycling up a hill, and four is the most intense like cycling up a mountain. I will test the heart rate to see how it increases or decreases depending on each incline level. The moderate activity would be levels one and two, while the strenuous activity would be levels three and four. Before beginning the exercise, I will sit on the bike in a resting position to get my resting heart rate.  Then I will start the stopwatch on the bike that records my cycling time, heart rate, and RPM (revolutions per minute). I will start at level one for five minutes and then record my heart rate after the session.  I will rest for five minutes and then repeat the same process for each incline level (three more times; four in total).   What may be the…

Norepinephrine is used to treat shock because it: O Raises blood pressure Lowers blood pressure Stops internal bleeding Prevents fainting 2O000

someone has profusely bled and her blood pressure dropped what mechanisms in her body will help compensate? select all that apply vasoconstriction increased adh increased heart rate  vasodilation

Drugs such as nifedipine slow the heart rate. Nifedipine can be described as what type of drug?

Norepinephrine acts on heart muscle cells by: Group of answer choices blocking the action of calcium. increasing heart contractility. causing a decrease in stroke volume. causing threshold to be reached more quickly. more than one of the above.

What is the cause of a heart attack? poor supply of oxygen rich blood to heart muscle cells blockage of arteries supplying blood to lungs blockage of veins supplying blood to lungs over consumption of alcohol action potential being blocked between right and left atria

Drugs NOT LIKELY to Improve Patient's Condition Drugs LIKELY to Improve Patient's Condition A drug that hyperpolarizes the pacemaker potential A drug that reduces current through T-type Ca?+ channels A drug that reduces current through voltage-gated Nat channels A drug that increases the current through F-type "Funny" channels

Caffeine lowers the heart rate by increasing rates of depolarization at the SA node   True False   Nicotine raises the heart rate because it stimulates the activity of the sympathetic neurons in medulla oblongata   True False   The Frank-Starling Law of the Heart states that the force of heart contraction is directly proportional to the initial length of the muscle fiber, within optimal limits of length   True False If the sarcomeres stretched beyond the optimal length, the force of contraction would go down, but that can potentially happen only during open heart surgery when the heart is not constrained by the pericardium, lungs, ribs and diaphragm.   True False It is the Na+ channel-driven spontaneous depolarization that is affected by sympathetic and parasympathetic inputs to speed up or slow down the firing rate of the SA node and other conductive cells.   True False

Blood doping has benefits for performance, but it has some consequences on the heart, short term and long term. Learning that blood doping adds red blood cells to the blood, what variable in the blood does this change and how does that affect blood flow? viscosity; increase blood flow resistance; decrease blood flow viscosity; decrease blood flow O resistance; increase blood flow