The opening and closure of the atrioventricular and semilunar valves is driven by ________.

Answers

Answer 1

Answer:

The opening and closure of the atrioventricular and semilunar valves is driven by the Difference in pressure across the valve.

What are the semilunar valves and their function?

Between the aorta and the left ventricle and between the pulmonary artery and the right ventricle, there are two semilunar valves, which are half-moon-shaped leaflets of endocardium and connective tissues. These valves allow blood to be pumped into the arteries but stop blood from returning to the ventricles from the arteries.

The bicuspid, or mitral, valve is located in the left atrioventricular chamber. The pulmonary semilunar valve connects the right ventricle to the pulmonary trunk. The aortic semilunar valve is the valve that connects the left ventricle to the aorta.

The aortic and pulmonary semilunar valves divide the ventricles from the major arteries, while the mitral and tricuspid atrioventricular valves divide the atria from the ventricles.

Thus, difference in pressure across the valve.

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Answer 2

Answer: Difference in pressure across the valve

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1.What are things you can do to manage the risks in your life to reduce any financial losses?

Answers

if i am an investor 1st on i need to safe my investment . so i will follow given structure :
1. if i have not enough money to invest these time i need to go short term investment .
2. if i want to purchase share in case of poor money supply i will invest in portfolio which is less risky then others .
3. to reduce risk i need to analysis real time data about investment .

Consider a risky portfolio, A, with an expected rate of return of 0.15 and a standard deviation of 0.15, that lies on a given indifference curve. Which one of the following portfolios might lie on the same indifference curve for a risk averse investor?A) E(r) = 0.15; Standard deviation = 0.20.B) E(r) = 0.15; Standard deviation = 0.10.C) E(r) = 0.10; Standard deviation = 0.10.D) E(r) = 0.20; Standard deviation = 0.15.E) E(r) = 0.10; Standard deviation = 0.20.

Answers

Answer:

C) E(r) = 0.10; Standard deviation = 0.10.

Explanation:

the risky portfolio with an expected rate of return of 0.15 and standard deviation of 0.15 lies on the same indifference curve as another with:

expected return of 0.10, standard deviation of 0.10
expected return of 0.05, standard deviation of 0.05
expected return of 0.20, standard deviation of 0.20
etc.

All the points in this indifference curve will have an expected return = to the standard deviation, you exchange one unit of expected return per one unit of standard deviation.

Market economies operate on the principle of supply and demand.

Answers

I think that the stament given above is true, as this principle lets business survive or fail without much interaction from the government.

The "IPS" (Investment Policy Statement) for a qualified retirement plan under ERISA states the asset allocations permitted in the plan. The IPS requires that 50% of assets be placed in stocks; and 50% of assets be placed in fixed income securities. The allocation percentage is allowed to vary by up to 10%, giving the manager the ability to time the market to enhance returns. The investment manager expects a bull market in equities and increases the equities allocation to 65% and reduces the fixed income allocation to 35%. The equities market rallies and the overall portfolio increases by 18% for the year. At the end of the year, the manager rebalances, bringing the portfolio allocation back to 50/50. The investment manager:________.

Answers

Okay so The investment manager has deviated from the initial asset allocation specified in the IPS, which was 50% in stocks and 50% in fixed income securities. They increased the allocation to stocks to 65% and reduced the fixed income allocation to 35%, taking advantage of their 10% allowable variation.

However, after the equities market rally and an 18% increase in the overall portfolio value, the manager rebalanced the portfolio back to the original 50/50 allocation, as per the IPS guidelines.

In summary, the investment manager initially deviated from the IPS allocation, but they eventually adhered to the IPS guidelines by rebalancing the portfolio back to 50% stocks and 50% fixed income securities at the end of the year. This rebalancing action aligns with their responsibilities outlined in the IPS.

Final answer:

The investment manager deviated from the initial 50/50 allocation ratio between stocks and fixed-income securities in anticipation of a bull market, leading to an 18% boost in the portfolio for the year. They then rebalanced the portfolio to the initial 50/50 ratio at the end of the year.

Explanation:

The investment manager, in this scenario, utilized flexibility within the Investment Policy Statement (IPS) to deviate from the prescribed 50/50 asset allocation between stocks and fixed-income securities. Noting an expected bull market in equities, they increased the equities allocation to 65%, leading to a portfolio increase of 18% for the year. At the end of the year, they adhered to the IPS by rebalancing the portfolio back to a 50/50 allocation.

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_____ managers assume that employees dislike work, that motivation is best accomplished by threats and coercion, and that people prefer to be directed rather than use their own initiative.a. Theory A
b. Theory Z
c. Theory Y
d. Theory X

Answers

The right answer for the question that is being asked and shown above is that: "c. Theory Y" This managers assume that employees dislike work, that motivation is best accomplished by threats and coercion, and that people prefer to be directed rather than use their own initiative. This is called the c. Theory Y

Final answer:

The described management style is Theory X, associated with Douglas McGregor. It assumes employees inherently dislike work and require coercion or threats to achieve goals, promoting an autocratic style. This contrasts with Theory Y and Z.

Explanation:

The perspective in the question describes Theory X management, which is attributed to Douglas McGregor. Theory X assumes that employees inherently dislike work and will avoid it if they can. Therefore, they must be coerced, controlled, or threatened with punishment to achieve goals. This theory promotes a more autocratic style of management, contrasting with Theory Y, which assumes employees are generally self-motivated, seek responsibility, and apply creativity to their jobs.

To put it in context, Theory Z, an alternate management style introduced by William Ouchi, integrates a large degree of worker involvement and is not mentioned in the question. Theory A does not exist in widely accepted management theories.

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What motivates people to comparison shop? A) the enjoyment of visiting different stores.
B)the push to find the most impressive product.
C)the desire to have the latest technology.
D)the desire to get the most for their money.

Answers

D)the desire to get the most for their money.

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