Answer:
B) Valves closing
Explanation:
A healthy heart makes a lub-dub sound with each beat. This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close.
Answer:
Melanoma signs and symptoms
Explanation:
A large brownish spot with darker speckles.
A mole that changes in color, size or feel or that bleeds.
A small lesion with an irregular border and portions that appear red, pink, white, blue or blue-black.
A painful lesion that itches or burns.
The correct answer is 920IU of vitamin D.
International Unit (IU) is a unit of measurement used widely to quantify hormones, vitamins, blood products and several medications. It refers to the mass or volume of a substance but varies depending on the substance which is being measured and its biological activity.
Regarding Vitamin D, 1 microgram (μg) of vitamin D is equivalent to 40IU. Since 6 oz of baked salmon contains 23 μg of vitamin D, Andy's vitamin D intake will be 920IU (23 μg * 40IU = 920IU).
