1. Structural proteins, maintain cell shape, akin to a skeleton, and compose structural parts of the body, like cartilage and bone in vertebrates.
2. Storage proteins house critical elements that your body needs.
3. Hormonal proteins basically act as your body's chemical "messengers."
4. Enzymes, which are biological catalysts needed for chemical reactions.
The period during which a heart chamber is contracting is called . 2. The period during which a heart chamber is relaxing is called . 3. During ventricular contraction, the AV valves (tricuspid and mitral valves) are . 4. During ventricular relaxation, the AV valves are . 5. The pulmonary and aortic valves open when the pressure in the exceeds the pressure in the pulmonary trunk and aorta. 6. The first sound of a cardiac cycle occurs when the are closing. 7. The second sound of a cardiac cycle occurs when
Answer:
1.The period during which a heart chamber is contracting is called systole.
2. The period during which a heart chamber is relaxing is called diastole.
3. During ventricular contraction, the AV valves (tricuspid and mitral valves) are closed.
4. During ventricular relaxation, the AV valves are open.
5. The pulmonary and aortic valves open when the pressure in the ventricles exceeds the pressure in the pulmonary trunk and aorta.
6. The first sound of a cardiac cycle occurs when the atrioventricular valves are closing.
7. The second sound of a cardiac cycle occurs when the semilunar valves are closing.
Explanation:
We can divide the heart cycle into two parts the systole and the diastole. The systole happens when the heart walls contract, and the diastole when these relax.
The relaxation and contraction allow the flow of blood into the different heart chambers.
During diastole, blood flows to the right atrium from the vena cavae superior and inferior, and the coronary veins and to the left atrium from the pulmonary veins. The blood accumulated in the atriums causes the AV valves to open, and blood flows to the ventricles. In this part, the atrium pressure exceeds the ventricular pressure allowing the blood's flow. When the atriums contract, the remaining blood that was in them, goes to the ventricles. Throughout all this process, the pulmonary and aortic valve is closed due to a pressure difference.
During ventricular systole, there are two phases. First, the ventricles contracts themselves, and the ventricular pressure increases, being higher than the atrium pressure. As a consequence, the AV valves close. During this first phase of contraction, there is not enough pressure to open the pulmonary and aortic valves. In the second phase, the ventricles completely contract themselves, the ventricular blood pressure increases. It becomes higher than the pressure in the aortic and pulmonary valves. As a consequence, the blood pushes the valves open, and blood goes out of the heart. Then, the difference in pressure between the ventricles and the pulmonary trunk and aorta causes the valves in these areas to close.
The first sound that we listen to is the S1 and is during the ventricular contraction that closes the atrioventricular valves. The second sound is the S2, and it happens when the semilunar valves close, also knowns as aortic and pulmonary valves. S2 occurs during diastole once that the blood is out of the ventricle and the contraction has finished.
What is the
relationship between the raw materials and
the products in photosynthesis?
Answer:
Photosynthesis is the conversion of light energy into chemical energy by living organisms. The raw materials are carbon dioxide and water; the energy source is sunlight; and the end-products are oxygen and (energy rich) carbohydrates, for example sucrose and starch
Explanation:
Describe the importance of a hypothesis in scientific inquiry.
Answer:
The fundamental concept of a theory is that there is no predetermined conclusion. A main feature of this phase of the experimental process is deriving conclusions from theories regarding the outcomes of possible studies and then conducting certain experiments to see if the predictions are supported.
Explanation:
A hypothesis is crucial in scientific inquiry as it serves as a testable and falsifiable explanation or prediction for a specific phenomenon or observation.
It provides a structured approach to investigating a research question and guides the design of experiments and data collection.
By formulating a hypothesis, researchers set a clear direction for their study and establish a basis for drawing conclusions based on evidence.
If the hypothesis is supported by data, it strengthens the understanding of the subject matter.
Alternatively, if the data refute the hypothesis, it encourages further exploration and refinement of scientific knowledge, promoting the advancement of understanding and discoveries in various fields.
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Question 14
The energy that drives the water cycle originates from:
a
The sun
b
The global wind system
c
Surface and ground water
d
Thermohaline circulationL
Answer:
the sun
Explanation:
the sun is energy that controls all weather activity. (pretty much)
When a slingshot is held in the position shown in the diagram, what kind
of energy is present?
Answer:
I can't see a diagram. But if the arrow is not moving, but about to be released it would be known as potential energy.
If stripped fish become more visible to predators, their fitness for their environment will decrease. Over time ____ will favor solid-colored fish and their numbers will grow.
Answer:
predators
Explanation:
HELPPPPPPPP FASTTTTTTTTTTT NOWWWWW
7. Fill in the table below:
Original DNA strand
A
T
G
G
G
C
T
A
C
T
A
G
(a) Complementary DNA strand
(b) Complementary mRNA strand to DNA in line (a)
(c) Amino Acids that would be made from the mRNA in line (b)
Answer:
T
A
C
C
C
G
A
T
G
A
T
C
Explanation:
Each base is paired as follows in DNA:
A paired with T
T paired with A
C paired with G
G paired with C
The letters refer to the primary nucleic acid bases: adenine, cytosine, guanine, and thymine.
b) mRNA strand:
A
U
G
G
G
C
U
A
C
U
A
G
c) Amino Acid Table below! Remember to start from the 5' end of mRNA (toward the 3' end) at a 'start codon'. So read through until you find a group of 3 that make up a start codon, then end with a 'stop codon'. I have to go take a final exam, but you got this!!!
PLS HELP MEEEE IM TIMED!!
Answer:
...34 minutes later...
Explanation:
Hi sorry Im probably too late anyway but I do hope you did good! Have a wonderful week!
Can somebody please help me with all the question?
Answer:
no
Explanation:
Which cell can survive without the help of other cells?
leaf cell
yeast cell
onion cell
muscle cell
Answer:
given below:
Explanation:
Q. A single cell organism can do everything a cell from a multi-cellular organism can do EXCEPT
answer choices
specialize
reproduce
use energy
make protein
What factors do you need to know in order to calculate a region's population growth
What is the fate of the sunlight during photosynthesis?
A. It is released as a product
B. It lowers the activation energy
C. It is converted to chemical energy
D. It is an unnecessary reactant
Answer:
C. It is converted to chemical energy is your answer
c ) itz ans.....................,.........
True or false if false type the right answer. History
Sorry I choosed biology by mistake
Answer:
the first is mostly false but somewhat tru the second is true and the third is true
Explanation:
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
What would most likely happen if coastal North Carolina increased implementation of wind energy?
A. Investment costs to taxpayers would decrease.
B. The population of greenhouse gases would decrease.
C. Turbines could be built in highly populated areas because of low noise pollution.
D. The energy output would be consistent because wind patterns are always predictable.
Answer:
The answer would be A because it would decrease
Answer:
A. Investment costs to taxpayers would decrease.
Which of the following has been proven true by researchers of identical twins?
a. Identical twins have different personality genes.
b. Identical twins are never the same gender.
c. Identical twins share the same DNA and blood type.
d. Identical twins are no more alike than fraternal twins.
Answer: B. Blood Type
Explanation: Got it right on edge
16. Explain how the following affect the rate of enzyme activity. a.Substrate Concentration:
b. pH:
c. Temperature:
Answer:
pH: If it's to much on either the alkaine or the acid side the enzymes will vary
Explanation:
Humans decide which varations are favorable or desired.
A. Artificial Aelection
B. natural selection
C. both
Answer:
Artificial selection
Explanation:
Artificial selection is the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.
Human beings are: more genetically similar than any other species. genetically diverse compared to other species. members of various species, depending on nationality.
Answer:
more genetically similar than any other species.
Explanation:
Which is not a function of the respiratory system? A. It warms air entering the body. B. It exchanges oxygen and carbon dioxide. C. It pumps blood to the organs.
Answer:
A. It warms air entering the body.
Explanation:
The respiratory system functions the organs and breathing. B tells you that it exchanges oxygen and carbon dioxide, which is functioning breathing. C is pumping blood into the organs, which is part of the respiratory system.
Hope this helped! :3
What's does the term origin time mean in earth science
Answer:
Well depending on context it can mean different things, I could mean one of these three thing, choose the one you think is the most suitable,
(1) The birth, existence, or beginning; starting point. (2) The cause; that which causes something to arise. (3) That which acts as the source or that which from where something is derived.
The cactus has a specialized fleshy stem that is specialized to store water for long periods of time. Which plant tissue most likely makes this action possible?
I know the answer is Ground, but i need to know WHY the answer is ground tissue. I WILL MARK BRAINLIEST
(on EDGE)
Answer:
If I were to guess its probably Vascular
Explanation:
Cactuses can store water nearly four months mainly in the winter and watering is not required for them frequently during that time. The stem acts as a reservoir for the amount of water it holds. The ground tissue of cactus has lots of parenchymal cells that store water.
What is parenchyma?The ground tissue system comes from a ground meristem which has three tissues, namely parenchyma, collenchyma, and sclerenchyma.
The ground tissue of cactus has many parenchyma cells that store water.
Thus, it can be concluded that the ground tissues helps cactus to store water for a long time.
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What percentage of our usable freshwater is already polluted?
Answer:
3% of the earth's water is fresh. 2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost. 0.5% of the earth's water is available fresh water
Explanation:
please give brainliest
Answer:
Water covers about 71% of the earth's surface.
326 million cubic miles of water on the planet
97% of the earth's water is found in the oceans (too salty for drinking, growing crops, and most industrial uses except cooling).
320 million cubic miles of water in the oceans
3% of the earth's water is fresh.
2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost.
0.5% of the earth's water is available fresh water.
If the world's water supply were only 100 liters (26 gallons), our usable water supply of fresh water would be only about 0.003 liter (one-half teaspoon).
In actuality, that amounts to an average of 8.4 million liters (2.2 million gallons) for each person on earth.
This supply is continually collected, purified, and distributed in the natural hydrologic (water) cycle.
Where Water is Found and the PercentageOceans97.2%Ice Caps/Glaciers2.0%Groundwater*0.62%Freshwater Lakes0.009%Inland seas/salt lakes0.008%Atmosphere0.001%Rivers0.0001%TOTAL99.8381%
natural selection compared to evolution
Having Freckles (F) is dominant over not having Freckles (f). If a person that is FF has children with a person that is FF, what is the probability of their children will have Freckle
a
0%
b
25%
c
50%
d
100%
Answer:
D
Explanation:
Because there isn't a non-dominent gene.
Que tipo de procariotas crees que podrían sobrevivir a un viaje por el espacio? Explica. ayuda pliis
Answer:
bacterias extremófilas
Explanation:
Los organismos extremófilos son aquellos capaces de vivir en condiciones extremas. Los extremófilos pueden ser tanto procariotas (arqueas y bacteria) como eucariotas (hongos, plantas, animales, etc). Algunos ejemplos interesantes de bacteria extremófilas capaces de sobrevivir en condiciones extremas como las que se encuentran en el espacio incluyen:
1- Deinococcus radiodurans, la cual es una bacteria capaz de resistir grandes dosis de radiación.
2- Thermus aquaticus, una bacteria capaz de vivir a temperaturas entre 50 y 80 °C. Esta bacteria produce una ADN polimerasa termoestable que ha sido utilizada para la reacción en Cadena de la Polimerasa (PCR)
3- Polaromonas vacuolata, una bacteria capaz de desarrollarse completamente sin problemas a temperaturas muy bajas. (entre 4 °C a 0 °C).
Hanan ate a meal that consisted of rice, dal, fish and fried potatoes. Explain the process of digestion of the food with reference to the parts and enzymes involved in the digestive system.
Answer: A digestive system can be defined as a system which is made up of the alimentary canal and the associated glands and organs which produce some of the enzyme- rich secretions that bring about digestion. The process of digestion of food Hanan are, is discussed below.
Explanation:
The food taken by Hanan consist of carbohydrates (rice, potatoes ), protein( fish, dal) , fats and oil( fish, fried potatoes). The digestion of the food taken passess through a long tube ( alimentary canal) which stretches from the mouth through oesophagus to stomach, intestines and down to the anus.
In the MOUTH, the following occurs:
--> The food is cut and grinded into smaller pieces by the help of the teeth.
--> the enzyme ptyalin acts on the carbohydrate part of the food converting it to complex sugar.
--> the food is mixed with saliva, with the help of the tongue, is rolled into a bolus which is then swallowed.
At the STOMACH, food enters through the peristaltic movements of the oesophagus, The following occurs:
--> The muscular walls of the stomach contract and relax forcefully, thus churning the food.
--> Gastric juice( consists of pepsin, renin and dilute hydrochloric acid). Dilute hydrochloric acid activates pepsinogen to pepsin which digests proteins to polypeptides.
--> Food remains in the stomach for three to four hours. By this time, it is a thick, creamy fluid called chyme which them moves to the duodenum (small intestine).
At the SMALL INTESTINE, digestion occurs at the first part called the duodenum, and later part called the ILEUM.
--> Several substances are secreted into the duodenum from the pancreas( pancreatic juice) and liver( bile), the accessory organs of digestion.
--> pancreatic juice contains three important enzymes whose activities include:
• Amylopsin: Breaks down complex sugar to maltose
• Trypsin: breaks down protein into peptides
• Lipase: Breaks down fat into carboxylic acids and glycerol (end product of digestion of fat).
--> Bile from the liver, adds water to the chyme, emulsifies fat and neutralise the action of dilute hydrochloric.
At the ILEUM, intestinal juice is produced by special cells of the small intestine. Their actions include:
• maltase: this acts on maltose converting it to glucose( which is the end product of carbohydrate digestion).
• erepsin: This acts on peptides converting it to amino acids( which is the end product of protein digestion).
Absorption takes place at the small intestine.
Qual das alternativas abaixo nao corresponde a função da agua? Solvente. Mudança de temperatura. Não tranporta substâncias. Hidrólise
True or false: A cell's DNA is replicated during the M phase of the cell cycle.
Which of the following cannot reliably prevent the impact of hurricanes on hurricane-prone places?
A)
restoring freshwater marshes
B)
allowing the growth of a natural buffer of trees
C)
completely preventing settlements in areas that seem prone to catastrophes
D)
encouraging people to avoid settling in areas known to be hazardous
E)
using satellite images to predict hurricanes
Answer:
I think the answer is d I hope this help
Answer:
A) restoring freshwater marshes
Explanation:
got it right on edg
What is MITOSIS really good at?
Mitosis is the reason we can grow, heal wounds, and replace damaged cells. Mitosis is also important in organisms that reproduce asexually: this is the only way that these cells can reproduce. This is the one key process that sustains populations of asexual organisms.
Explanation:This is what I found during my research and I hope this helped somehow. Have a good one!
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