Please answer these questions with explanation. Thank you in advance. We\'ve est
ID: 3479097 • Letter: P
Question
Please answer these questions with explanation.
Thank you in advance.
We've established that Dr. Co was able to survive a long period at elevated rhythm because her cardiac muscle cells were conditioned by exercise. But why was that elevated heart rate a problem in the first place? Why was the answer to survival that her cardiac muscle cells had more myoglobin and glycogen?
You're embarking on a diet fad called a "water cleanse" in which you are to drink 4 gallons of water in a day. You are also expected to monitor your heart rate. In the first half of the day you haven't made much of a dent in your water requirement, so during your lunch hour you try to catch up by drinking 1.5 gallons of water quickly. First, imagine what changes may occur to your blood. Next, predict what may occur to your heart rate. O A Heart rate will increase O B Heart rate will decrease OCNo change to heart rateExplanation / Answer
Answer 1:- Option B – Heart rate will decrease.
Explanation:- Water cleanse diet is also known as water fasting. In this type of diet an individual consumes only water for a set period of time. Water cleanse diet has many health benefits. Intermittent water fasting leads to weight loss, reduced body fat, it lowers blood pressure and heart rate, and thus reduce the risk of serious conditions.
Answer 2:- Option B – Hold cell in a depolarized state while the Na+ channel resets.
Explanation:- During contraction the action potential develops. In cardia muscle, action potential is achieved by an inward flow of both sodium and calcium ions. The flow of sodium ions is rapid but very short-lived, while the flow of calcium is sustained and gives the plateau phase characteristic of cardiac muscle action potentials. The cardiac muscle fibres require calcium ions to be present extracellularly in order to contract.
Answer 3:- Option D – None of these would occur.
Explanation:- Stroke volume (SV) decrease immediately after blood donation. As EDV and SV are directly related to each other. Decrease in EDV results in decrease in SV, therefore, immediately after blood donation there is no increase in EDV and SV. Heart rate remains unchanged even immediately after blood donation.
Answer 4:- Option D – Cardiac output will increase.
Explanation:- Cardiac output is the amount of blood that is pumped by the heart in 1 minute. Thus as the heart rate (pumping of heart per minute) increases, the cardiac output will increase.