True. The statement 'The more oxygen the muscles receive, the more energy you have' is accurate. With an increased oxygen supply, muscles can more efficiently produce adenosine triphosphate (ATP), the energy currency of the cell, through aerobic metabolism.
During exercise, especially after the first few minutes, your body begins to rely more heavily on aerobic metabolism, which uses oxygen to convert nutrients from the food we eat into energy. ATP is produced through a process known as cellular respiration, which occurs in the mitochondria of cells. Aerobic respiration is significantly more efficient than anaerobic metabolism, producing 18 times more ATP per molecule of glucose. This efficiency explains why an increased heart rate and breathing rate, which supply the muscles with more oxygen, can improve endurance and energy levels. Furthermore, while glycogen and creatine phosphate can provide energy in the absence of oxygen, these sources are limited and not as sustainable as oxygen-rich aerobic metabolism.
Hormones; cholesterol. Which group of lipids represents steroids? A)notable structure=fused rings- presence of deferent functional groups leads to different functions B) Fatty Acid replaced with phosphate Amphiphathic C) one glycerol and three fatty acids- no double bonds between carbons D) one glycerol and three fatty acids- at least one double bond
Option A-
notable structure = fused rings
What always affects measurement error in an experiment?
A.investigator bias
B.variability in nature
C.instrument precision
D.misreading the instrument
When a nerve impulse reaches the end of an axon, the neurons release ________________, chemicals that carries the signal across the synapse.
A. Action potential
B. Steriods
C. Neurotransmitters
Answer: The correct answer for the fill in the blank is- C) Neurotransmitters.
Neurotransmitters are the chemical messengers in the body that help in the transmission of signals from one neuron to another neuron across a gap called synapse ( such as neuromuscular junction).
These chemicals are released from synaptic vesicles that are present in the nerve endings and also from some glands (like adrenal gland and pituitary).
Example of neurotransmitters- Dopamine, acetylcholine, serotonin.
How much of the worlds water is saltwater? A. 97.5%. b. 50% C.25% D. 2.5%
how can what you see can impact other human body systems?
All of the following are true about science except
Answer
A. It reflects the personal opinions and beliefs of scientists.
B. It is developed using the inquiry and experimentation.
C. It is a body of knowledge about the world around us.
D. It changes over time when new discoveries are made.
Indicate why the hapmap project is useful in diagnosing human disease
A confined aquifer is _____.
A) found in the unsaturated zone
B) found between two impermeable layers
C) the top layer of the saturated zone
D) separated from the main groundwater
Aquifers are underground layers of rocks which contain water and serve as important sources of freshwater. They are located below the water table and in the saturated zone. If an aquifer becomes trapped between two impermeable layer (for example, one below and one above that overlies the aquifer), the pressure act on the aquifer and it can become a confined aquifer.
A confined aquifer is found between two impermeable layers.
Which of the following can impact the climate of an area based on its geographical relief, such as whether it is close to mountains or ocean?
A.latitude
B.elevation
C.winds
D.topography
How do small intestinal epithelial and root hair cells function in nutrient procurement?
In the small intestine, the epithelial cells of the villi, which are covered with microvilli, absorb water-soluble nutrients such as sugars and amino acids into the bloodstream, while fatty acids and fat-soluble vitamins are absorbed by lacteals into the lymphatic system. These structures increase the surface area for efficient nutrient uptake.
Explanation:Function of Small Intestinal Epithelial and Root Hair Cells in Nutrient ProcurementThe small intestine is where the majority of nutrient absorption occurs after the digestion of protein, fats, and carbohydrates. The inner surface of the small intestine contains many villi, which are finger-like projections, and the surface of these villi is covered with microvilli. This significantly increases the surface area for absorption, enhancing the efficiency of nutrient uptake. The epithelial cells lining the villi are responsible for transporting nutrients into the bloodstream and lymphatic system.
Each microvillus, as seen under a transmission electron microscope, is approximately 1 µm long and 0.1 µm in diameter. The core of these microvilli contains actin microfilaments, assisting in the absorption process. In the small intestine, water-soluble nutrients, such as simple sugars and amino acids, are absorbed directly into the capillary blood in the villi and then transported to the liver via the hepatic portal vein.
Conversely, fatty acids and fat-soluble vitamins are absorbed by lacteals, which are part of the lymphatic system within the villi. Root hair cells, while not covered in this question, have a similar absorptive role in plants, taking up water and nutrients from the soil.
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The creationist and evolutionist are in agreement on all of the following items except: cell complexity the role of certain organelles in cell chemistry the ability of matter to be self organizing the levels of organization of complex organisms
The creation-evolution controversy (also termed the creation vs. evolution discussion or the origins dispute) includes an ongoing, recurring cultural, political, and theological debate about the issues of the Earth, of humanity, and of other life. Within the Christian world, creationism was once widely considered to be true, but since the mid-19th-century evolution by natural choice has been verified as an empirical scientific fact.
Question:
The creationist and evolutionist are in agreement on all of the following items except:
• cell complexity
• the role of certain organelles in cell chemistry
• the ability of matter to be self organizing
• the levels of organization of complex organisms
Answer:
• the ability of matter to be self organizing
Explanation:
A creationist is a person who believes in the creation story. A creationist believes that life originated from a Creator( God) who made the heavens and the earth. A creationist believes God created human beings, fish, birds, and every other living organism on earth. This belief system is a religious belief.
An evolutionist believes in the the theory of evolution. An evolutionist believes that life develops millions of years ago due to the evolution of simple life forms present on earth.
A evolutionist believes that organisms evolves of change due to physical and behavioural characteristics that they inherited.
A creationist and an evolutionist disagree on the fact that matter is self organizing.
Dolly, a female domestic sheep, was the first mammal to be cloned from a fully differentiated cell, using the process of nuclear transfer the nucleus of a _____________ is transferred into a cytoplasmic donor.
Of the following types of transport, which two may the cell utilize if a large molecule or organism cannot pass through the membrane?
active transport
passive transport
pinocytosis
facilitated diffusion
phagocytosis
Answer: Phagocytosis and pinocyotosis.
Explanation:
Endocytosis is a cellular process in which the substance are bought into the cell. It can be food, dissolved particles, damaged cell, et cetera.
It consists of pinocytosis and phagocytosis. The material that has to be ingested inside the cell is surrounded by the area of the cell membrane, which turns into a vesicle that contains the ingested material.
The Pinocytosis can be defined as cell drinking and phagocytosis can be defined as cell eating.
why is the longer chromosome pair used to model crossing over?
The reason is because using a longer chromosome pair would help the learner to see the pattern in the spread out
Explanation;Cross-over is the process that takes place in meiosis process of cell division, where a cell in the gonads divides in two phases to yield four daughter cells that have half the genetic composition as the parent cell.Cross-over occurs in prophase I of meiosis I, where non-sister chromatids of the homologous chromosomes joins at a point called chiasmata and exchanges the segment of chromatids, this ensures genetic variation among organism. Using longer chromosome to show the model of cross-over ensures that the pattern in the spread out is clearly visible to the learner.Harmful particles and gases in the air are known as ____________________.
Answer: Pollutant
Explanation:
Any undesired particle that is present in the environment is known as pollutant. These can be particulate matter or harmful gases that is present in the atmosphere.
These gases can be carbon dioxide( more than normal), carbon monoxide, sulfur dioxide, et cetera. Pollutants can be pollen grains, dirt and smoke which pollutes the environment.
Hence, undesired particles are known as pollutants.
The circulatory, or cardiovascular system, is composed of
a. heart, arteries and veins.
b. lungs, heart and brain.
c. heart, blood and blood vessels.
d. lungs, blood vessels and heart.
The circulatory system is composed of blood vessels that take blood apart from and towards the heart. Arteries move blood aside from the heart and veins bring blood back to the heart. The circulatory system offers oxygen, nutrients, and hormones to cells, and eliminates decay products, like carbon dioxide.
What data would you need to see in order to draw conclusions about the effectiveness of preventive surgeries?
The conclusion about the effectiveness of preventive surgeries can be drawn by gathering the data from the people who experience the surgery. The data would need the observations of the patients that had the surgery.
What are preventive surgeries?Preventive surgeries are those surgeries in which the tissues or organs or glands are removed from the body, even if they show no signs of cancer.
Preventive surgeries are done to prevent the development of cancer in the future. These surgeries are done on people who have a high risk of developing cancer.
Thus, data gathered from those who have undergone preventive surgery can be used to derive conclusions about their efficacy. The observations made by the surgical patients would be necessary for the data.
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In what different ways did people live in ancient China?
Answer:
Most of the people in ancient China were peasants, that is, people who work on farms, both cultivating and raising cattle.
Explanation:
Ancient China was one of the oldest civilizations in the world with continuity until today, it has its origins in the Yellow River basin, where the first Xia, Shang and Zhou dynasties arose. The existence of written documents about 3,500 years ago has allowed the development in China of a very precise historiographic tradition, which offers a continuous narration from the first dynasties to the contemporary age. The Chinese culture, according to the myth, opens with the three original emperors: Fuxi, Shennong and finally the Yellow Emperor Huang, the latter considered the true creator of the culture. However, there are no historical records that demonstrate the real existence of these personalities, which according to the oral transmission from generation to generation, would have lived about 5000 to 6000 years ago.
The traditional Chinese storytelling is based on the so-called dynastic cycle, whereby historical events are explained as the result of successive dynasties of kings and emperors who go through alternate stages of boom and bust. This model of the dynastic cycle has been criticized by many authors1 for two fundamental reasons: First, for its simplicity, since the model adopts a recurring pattern according to which the first emperors are heroic and virtuous, while the latter are weak and corrupt This vision is undoubtedly influenced by the interpretation of the reigning dynasties themselves, which found in the degradation of the preceding dynasty a legitimation of their own rise to power. Second, the dynastic model has also been criticized for presenting an artificial nationalist vision, because what in an alternative interpretation could be seen as a succession of different states and civilizations in the same territory, appears as a mere alternation of government regimes in the unperturbed framework of a single national entity.
2. While looking at a cell under a microscope, a scientist is able to see a biological molecule. This molecule is a nucleic acid with a ladder structure and contains the nitrogenous bases adenine, thymine, cytosine, and guanine. Based on this information, what conclusion can the scientist draw regarding this nucleic acid?
(A)The nucleic acid is DNA and would be found in the cell’s nucleus.
(B)The nucleic acid is DNA and would be found in the cytoplasm.
(C)The nucleic acid is RNA and would be found in the cytoplasm.
(D) nucleic acid is RNA and would be found in the cell’s nucleus. ...?
The correct answer is A
The scientist can determine that this nucleic acid is a DNA molecule, because it contains Thymine, which does not occure in the RNA molecule. The RNA molecule contains Adenine, Guanine and Cytosine just like the DNA, but unlike the DNA it contains Uracil, not Thymine.
Secondly, the scientist can say with certainty that this DNA molecule is surrounded by a nucleus based on the structure of the nucleic acid described. Only eukaryotic cells have ladder structure. The prokaryotic cells have circular DNA and do not have any organelles, like the nucleus. Therefore, from the ladder structure of the DNA the scientist can see that the cell has a nucleus.
If an original cell has the genetic makeup AaSs. What would the genetic makeup of the daughter cells be?
The genetic makeup of the daughter cells can include AA, Aa, aA, or aa with each possibility occurring with a 25% chance.
Explanation:When an original cell has the genetic makeup AaSs, the genetic makeup of the daughter cells can vary. This is because during the formation of gametes (eggs or sperm), the alleles for each trait separate randomly, according to Mendel's principle of random segregation. Therefore, the possible genetic makeup of the daughter cells could include AA, Aa, aA (which is the same as Aa), or aa, with each possibility occurring with a 25% chance.
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What happens to dna before cell division??
What are the major factors that influence the rock cycle
Vines growing up a wall is an example of _____.
phototropism
thigmotropism
gravitropism
hydrotropism
Vines growing up a wall is an example of thigmotropism.
What is thigmotropism?
Thigmotropism is the movement or change in orientation of a plant’s growth as a reaction to touch. The orienting factor is generally a hard surface that can change the direction of the plant’s growth or the growth of one of its organs.Thigmotropism can be in the form of opening or closing of parts of the plant such as the petals or leaves, the coiling of the plant around the surface, as well as other ways.
Why other options are incorrect?
Phototropism is incorrect as it relates to light.Gravitropism is incorrect as it relates to gravity.Hydrotropism is incorrect as it relates to water.Hence, vines shows movement it is an example of thigmotropism.
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What are some safety concerns for students working in the lab?
Describe the similarities and differences between a bats wing and a birds wing.
HOW DEEP IS THE CENTER OF THE EARTH?
What advantages does a skeleton made of cartilage offer the shark?
Which is NOT a function of blood? a. carrying oxygen from the cells to the lungs c. transport nutrients to the cells b. transporting waste to the kidneys d. carrying cells and molecules to fight infection
The function that is NOT assigned to blood is carrying oxygen from the cells to the lungs. The actual task of blood includes transporting oxygen from the lungs to the cells, nutrients from the digestive system to the cells, carrying waste to the kidneys, and transporting cells, molecules to fight infections.
Explanation:The function of blood in the body is not to carry oxygen from the cells to the lungs. Instead, one of the primary roles of blood is its responsibility to transport oxygen from the lungs to the various cells throughout the body. In addition to carrying oxygen, our blood carries numerous other essential substances.
These include nutrients (which are transported from the digestive system to other areas of the body), waste products
(which are moved to the kidneys for removal), and cells, molecules, and antibodies that help our bodies to fight off infection and heal from injuries.
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which Mineral properties depend on composition a. structure b. luster c. cleavage or d. streak?
In a DNA molecule, which nitrogenous bases are bonded together?
A purines with purines
B pyrimidines with purines
C pyrimidines with pyrimidines
Final answer:
In a DNA molecule, purines are bonded with pyrimidines. Adenine (A) bonds with Thymine (T), and Guanine (G) bonds with Cytosine (C).
Explanation:
In a DNA molecule, purines are bonded with pyrimidines. This means that Adenine (A), a purine, will always bond with Thymine (T), a pyrimidine. Similarly, Guanine (G), another purine, will always bond with Cytosine (C), a pyrimidine. The base pairs (A-T and G-C) are held together by hydrogen bonding, creating the double-stranded helical structure of DNA.