Which of the following describes how the septum in the heart affects blood flow? a.) It pumps blood out of the heart to the rest of the cardiovascular system when heart muscles contract. b.)It separates the heart's left and right sides to keep oxygenated and deoxygenated blood from mixing. c.)It separates the heart's upper and lower chambers to keep incoming and outgoing blood from mixing. d.) It accepts blood into the heart from the rest of the cardiovascular system when heart muscles relax.

QUESTION POSTED AT 13/11/2019 - 05:21 PM

Related questions

How to arrange from smallest to biggest organ,organism,gene,nucleus,cells,tissue,chromosome,system?

Nucleus,cells,chromosome,gene,organ,system,organism

ANSWERED AT 06/12/2019 - 02:53 PM


QUESTION POSTED AT 06/12/2019 - 02:53 PM

Biology shows us the fossil record and comparative anatomies. Chemistry shows us that organic molecules can come from inorganic matter. Geology shows us that organisms that used to live together are found on separate continents due to continental drift. Which fields of science provide evidence for evolution? a.)biology only b.)biology and chemistry c.)biology and geology d.)biology, chemistry, and geology HEELLLLLP PPPLLLSSS

The answer to your question is D. To create the full picture of evolution, and how the species that exist on our planet came to exist in their current forms, it is important to take in information from all the possible fields of science including biology, chemistry and geology.

ANSWERED AT 06/12/2019 - 02:53 PM


QUESTION POSTED AT 06/12/2019 - 02:53 PM

Most stars are at what point in their life cycles? a. supergiant c. main sequence b. giant d. white dwarf

Answer: c. main sequence

The nuclear fusion reaction is the natural process which occurs in the stars which is responsible for their development. The size of the star changes at different stages of their life. A cloud, dust and gas combine to form nebula which is the initial stage of star formation. The star undergoes multiple nuclear fusion reactions with the surrounding heavy compounds like helium, carbon dioxide and hydrogen to attain a stable form. The main sequence is the stable form of star and it takes million's of years to attain this form. Most of the stars in the galaxy are in the main sequence.

ANSWERED AT 06/12/2019 - 02:48 PM


QUESTION POSTED AT 06/12/2019 - 02:48 PM

How does the cell theory describe the levels of organization of living organisms?

The cell is the basic unit of structure and organization of organisms. 

ANSWERED AT 06/12/2019 - 02:44 PM


QUESTION POSTED AT 06/12/2019 - 02:44 PM

The paper clip, which is denser than water, floats on the surface because of water's surface tension. Surface tension is a property of water that is the result of polar water molecules sticking together or water's property of A) adhesion. B) cohesion. C) buoyancy. D) capillary action.

The answer is cohesion. The high surface tension helps the paper clip (with much higher density) float on water. The property of a liquid that allows it to resist an external force, due to cohesive nature of its molecules. Cohesion refers to the attraction of molecules for molecules of the same kind. Water molecules have strong cohesive forces due to their ability to form hydrogen bond with each other.

ANSWERED AT 06/12/2019 - 02:07 PM


QUESTION POSTED AT 06/12/2019 - 02:07 PM

Name 3 professional areas in the U.S. that use the metric system

Answer;

-the scientific fields, medical fields, or technical fields

Explanation;

-There are two main systems of measurement in the world: the Metric system and the US standard system.

-The Metric (or Decimal) system is made of units based on powers of 10. To convert units, one needs to move the decimal point.The prefix (beginning part of the word- i.e. kilo or milli) describes the size of the given unit.

ANSWERED AT 06/12/2019 - 01:58 PM


QUESTION POSTED AT 06/12/2019 - 01:58 PM

If a geologist finds a rock while in the field chances are high tjat the rock contains. A iron. B carbon. C potassium. and D silicon.

The correct answer is option D, Silicon

Rocks are basically made up of elements which are abundant in the Earth’s crust. Since Earth’s crust has rich reserves of silicon and oxygen, it is made up of silicate minerals. The silicate minerals are basically of two types – light (70 % Silica content) and dark (50 % silica content) silicates.  Light silicates are knows as quartz, muscovite and feldspar and Dark silicates includes ferromagnesian (consisting of iron and magnesium).

ANSWERED AT 06/12/2019 - 01:48 PM


QUESTION POSTED AT 06/12/2019 - 01:48 PM

Which of the following structures are used by prokaryotes for attaching to surfaces? a. capsule d. nucleoid

Capsule- This additional outer covering protects the cell and helps to adhere to surfaces and nutrients.

ANSWERED AT 06/12/2019 - 01:46 PM


QUESTION POSTED AT 06/12/2019 - 01:46 PM

A bacterial cells DNA is found in its a. capsule b. nucleoid region c. nucleus d. ribosomes

The answer is: b. Nucleoid region

ANSWERED AT 06/12/2019 - 01:41 PM


QUESTION POSTED AT 06/12/2019 - 01:41 PM

In which form do plants store energy? a. starch b. glycogen c. chitin d. cellulose

In which form do plants store energy? A. Starch

ANSWERED AT 06/12/2019 - 01:38 PM


QUESTION POSTED AT 06/12/2019 - 01:38 PM

Which of the following describes why wetlands are important to the water cycle?

Wetlands Water Cycle describes and talks about how water can go from a solid, liquid, and gas. It helps our rivers run, lakes to stay full, and supplies our homes with water. Without the Water Cycle our water supply would be in trouble. 

ANSWERED AT 06/12/2019 - 12:52 PM


QUESTION POSTED AT 06/12/2019 - 12:52 PM

What might be a symptom of a person whose vein valves are not functioning properly and are causing fluid it flow away from the heart?

Considering answers;

-fever

-constricted veins

-swollen veins

-confusion


Answer;

Swollen veins


Swollen veins might be a symptom of a person whose vein valves are not functioning properly and are causing fluid it flow away from the heart.


Explanation;

Valves are structures that are found in the circulatory system both in the heart and the veins.

They function to prevent the back flow of blood.

They do so by ensuring the continuous flow of blood in one direction.

If the valves are not functioning properly it may lead to various effects such as swollen veins due to the back flow of blood which may lead to the pooling of blood in the extremities.

ANSWERED AT 06/12/2019 - 12:47 PM


QUESTION POSTED AT 06/12/2019 - 12:47 PM

During reduction, 3-PGA reacts with ATP and NADPH. What does ATP contribute to the reaction? A. carbon B. hydrogen ions C. electrons D. phosphate group

D. phosphate group

ATP usually releases energy by breaking down the weak phosphate cell present.  The energy released due to the breaking down of the phosphate cell is then utilized. The ATP is converted to ADP. Whenever a cell feels the necessity for energy it releases a phosphate to gather the energy. It is an automatic and ongoing process. The weak bond between the second and the third phosphate is always targeted for turning ATP to ADP. This is the reason ATP is considered the main energy currency for the cell.

ANSWERED AT 06/12/2019 - 12:34 PM


QUESTION POSTED AT 06/12/2019 - 12:34 PM

Which statement correctly compares and contrasts the three stages of cellular respiration that occur in the presence of oxygen?

Cellular respiration is a cellular process in the metabolism of sugar components to produce metabolites such as lactic acid, acetic acid, aldehydes, and other components. It starts with the cleaving of the sugar component (6-carbon) to 3-carbon components until it becomes pyruvate

ANSWERED AT 06/12/2019 - 12:23 PM


QUESTION POSTED AT 06/12/2019 - 12:23 PM

Which statement best describes the role of the cell membrane? A) It stores genetic material. B) It breaks down food particles. C) It encloses the cytoplasm. D) It produces proteins.

C.  The cell membrain is around the cell protecting, kind of like the membrain of an egg.

ANSWERED AT 06/12/2019 - 12:19 PM


QUESTION POSTED AT 06/12/2019 - 12:19 PM

The _____ passively diffuses oxygen and carbon dioxide in and out of the cell.

Your answer should be plasma membrane.

ANSWERED AT 06/12/2019 - 12:11 PM


QUESTION POSTED AT 06/12/2019 - 12:11 PM

Which of the following describes the role that enzymes play in the process of metabolism

Answer;

Enzymes increase the rate of the chemical reactions carried out during metabolism.

Explanation;

-Some enzymes help to break down large nutrient molecules, such as proteins, fats, and carbohydrates, into smaller molecules. This process occurs during the digestion of foodstuffs in the stomach and intestines of animals.

-Other enzymes guide the smaller, broken-down molecules through the intestinal wall into the bloodstream. Still other enzymes promote the formation of large, complex molecules from the small, simple ones to produce cellular constituents.

-Enzymes are also responsible for numerous other functions, which include the storage and release of energy, the course of reproduction, the processes of respiration, and vision.

ANSWERED AT 06/12/2019 - 11:50 AM


QUESTION POSTED AT 06/12/2019 - 11:50 AM

I In cells without cell walls what forms the outside boundary that separates the cell from its environment

This would be the semi-permeable cell membrane.

ANSWERED AT 06/12/2019 - 11:48 AM


QUESTION POSTED AT 06/12/2019 - 11:48 AM

Describe a food chain of which you are a member

A food chain is a hierarchical series of organisms each dependent on the next as a source of food. 

ANSWERED AT 06/12/2019 - 11:46 AM


QUESTION POSTED AT 06/12/2019 - 11:46 AM

What information does the classification system for organisms give you?

The classification system helps you organize information about organisms. This system helps people know a lot about the organisms from its catatgory.

ANSWERED AT 06/12/2019 - 11:46 AM


QUESTION POSTED AT 06/12/2019 - 11:46 AM

Which cell part contains directions for cell growth and reproduction? a. cell wall b. plasma membrane c. nucleus d. pores

The answer is C: nucleus. Hope this helps. Sorry this is late.

ANSWERED AT 06/12/2019 - 11:18 AM


QUESTION POSTED AT 06/12/2019 - 11:18 AM

Which would provide the body with the most energy? a. Carrying oxygen from the lungs to the cells b. Breaking the bonds in a disaccharide c. Breaking a single carbon bond d. Creating bonds to make a simple sugar

b. Breaking the bonds in a disaccharide. Disaccharides are sugars, sugars are the body's primary fuel. Starch for example is the complex sugar found in plants, broken down in the body to form glucose which is a great source of energy for the body. When the stomach digests food, the carbohydrate in the food breaks down into another type of sugar.

ANSWERED AT 06/12/2019 - 10:53 AM


QUESTION POSTED AT 06/12/2019 - 10:53 AM

In what way can open-mindedness interfere with scientific progress? a. It can prevent the development of new ideas. b. It can lead to the acceptance of untested ideas. c. It can lead to too much critical evaluation of ideas. d. It can prevent the development of scientific consensus.

The correct answer is option b. It can lead to the acceptance of untested ideas.

The open mindedness can be defined as the ability to believe on an idea reported by a new evidence. The open-mindedness can cause the acceptance of the wide range of ideas. Open mindedness leads to the acceptance of an idea with respect to a new evidence, these evidences may or may not be valid. Hence, it can lead to acceptance of ideas, which are not tested.

ANSWERED AT 06/12/2019 - 10:53 AM


QUESTION POSTED AT 06/12/2019 - 10:53 AM

How is a model of an atom different from a real atom? A. A model of an atom is not as big as an actual atom. B. A model of an atom is the same as a real atom. C. A model of an atom is more complex than a real atom. D. A model of an atom is not as small as an actual atom.


it would be (D) because you cant see an atom without a microscope and a model is a larger model of the actual thing. 

ANSWERED AT 06/12/2019 - 10:29 AM


QUESTION POSTED AT 06/12/2019 - 10:29 AM