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masya89 [10]
3 years ago
13

Summarize how the actions of the heartbeat make their first and second sounds.

Biology
1 answer:
professor190 [17]3 years ago
7 0
When the blood is pumped from the right ventricle to the pulmonary artery.. the "lubb" sound is heard... while ..when the oxygenated blood is pumped by the left ventricle to the aorta.. a larger "dubb" sound is heard... 
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marysya [2.9K]

The properties are:-

1. Water is polar. Water molecules are polar, with partial positive charges on the hydrogens, a partial negative charge on the oxygen, and a bent overall structure. This is because oxygen is more electronegative, meaning that it is better than hydrogen at attracting electrons.

2. Water is an excellent solvent. Water has the unique ability to dissolve many polar and ionic substances. This is important to all living things because, as water travels through the water cycle, it takes many valuable nutrients along with it!

3. Water has high heat capacity. It takes a lot of energy to raise the temperature of a certain amount of water by a degree, so water helps with regulating temperature in the environment. For example, this property allows the temperature of water in a pond to stay relatively constant from day to night, regardless of the changing atmospheric temperature.

4. Water has high heat of vaporization. Humans (and other animals that sweat) use water’s high heat of vaporization to cool off. Water is converted from its liquid form to steam when the heat of vaporization is reached. Since sweat is made mostly of water, the evaporating water absorbs excess body heat, which is released into the atmosphere. This is known as evaporative cooling.

5 0
3 years ago
Which statement explains the effect of temperature on the rate of photosynthesis
marusya05 [52]

Answer:As temperature increases, the rate of photosynthesis constantly increases.

Explanation:

7 0
3 years ago
State the functions for the reproductive of males​
Juli2301 [7.4K]

Answer:

The purpose of the organs of the male reproductive system is to perform the following functions: To produce, maintain, and transport sperm (the male reproductive cells) and protective fluid (semen) To discharge sperm within the female reproductive tract during reproduction

3 0
3 years ago
If blood cells are placed in a hypertonic solution, ___________a. the cells will shrink due to water loss by the cell. b. the ce
yKpoI14uk [10]

Answer:

The correct answer is option a. "the cells will shrink due to water loss by the cell".

Explanation:

Cells placed in a hypertonic solution will shrink due to water loss by the cell. An hypertonic solution has a high content of solutes dissolved, which makes it a solution with high tonicity. Water tends to move from a solution of low tonicity to a solution with high tonicity. As a result, cells placed in a hypertonic solution will start to loss their inner water and shrink, which causes its death.

4 0
3 years ago
Which process helps regulate Earth's climate by transporting warm seawater to colder regions of seawater?
erma4kov [3.2K]

Answer: The real answer is actually WATER CYCLE.

Explanation:it can be tides

8 0
4 years ago
Read 2 more answers
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