Answer:
Physical exercise leads to an increase in the arteriovenous oxygen difference in all individuals. As exercise intensities increase, the muscles increase the amount of oxygen they extract from the blood, and this therefore results in further increases in a-vO2 diff.
Explanation:
There is a difference in the amount of oxygen intake during rest and vigorous activity due to the higher amount of energy required during vigorous activity.
What is aerobic respiration?The breakdown of glucose in the presence of oxygen to generate carbon dioxide water and energy in the form of ATP and heat energy is called aerobic respiration.
Aerobic respiration is a characteristic of higher animals because of a higher level of energy required by them. The process of aerobic respiration produces higher levels of energy compared to the process of anaerobic respiration which is a characteristic of lower organisms.
When a person is performing a vigorous activity, the energy requirement increases. This increases the process of cellular respiration which requires oxygen.
Therefore, when a person is performing vigorous activity their oxygen intake is higher compared to when they are at rest.
Read more about aerobic respiration, here
https://brainly.com/question/13617008
#SPJ2
What's the difference between a hypothesis and a theory?
Describe the general temperature of ocean currents near the equator and the poles.
Answer:
Currents flowing away from the Equator are generally warm.
Explanation:
That is because the Equatorial regions is the source of warm air and water. Ocean currents flowing from the Equator thus carry this warm water with them. The most prominent example is the Gulf Stream in the Atlantic Ocean, which runs most of the way to the North Pole and brings mild winter climates in its wake to adjacent coastal areas. In the Pacific Ocean the Alaska Current likewise carries warm water northward making Anchorage, Alaska much milder in winter than inland areas with the same latitude.
How does seed become dormant?
Answer:
Seeds may be dormant because the seed coat prevents germination, or because the embryo - by itself or together with chemicals - inhibits germination. Seed coats render seeds dormant if: their hardness prevents the embryo from expanding. impermeability to water stops development.
Briefly explain how the volume in your thoracic cavity changes during inhalation and exhalation. Be sure your answer includes how those changes in volume lead to air moving in and out. Include which gas, oxygen or darbon dioxide regulates respiration rate.
Answer:
Both inhalation and exhalation depend on pressure gradients between the lungs and atmosphere, as well as the muscles in the thoracic cavity.
Explanation:
The thoracic cavity, or chest cavity, always has a slight, negative pressure which aids in keeping the airways of the lungs open. During the process of inhalation, the lung volume expands as a result of the contraction of the diaphragm and intercostal muscles (the muscles that are connected to the rib cage), thus expanding the thoracic cavity. Due to this increase in volume, the pressure is decreased, based on the principles of Boyle’s Law. This decrease of pressure in the thoracic cavity relative to the environment makes the cavity pressure less than the atmospheric pressure. This pressure gradient between the atmosphere and the thoracic cavity allows air to rush into the lungs; inhalation occurs. The resulting increase in volume is largely attributed to an increase in alveolar space because the bronchioles and bronchi are stiff structures that do not change in size.During this process, the chest wall expands out and away from the lungs. The lungs are elastic; therefore, when air fills the lungs, the elastic recoil within the tissues of the lung exerts pressure back toward the interior of the lungs. These outward and inward forces compete to inflate and deflate the lung with every breath. Upon exhalation, the lungs recoil to force the air out of the lungs. The intercostal muscles relax, returning the chest wall to its original position. During exhalation, the diaphragm also relaxes, moving higher into the thoracic cavity. This increases the pressure within the thoracic cavity relative to the environment. Air rushes out of the lungs due to the pressure gradient between the thoracic cavity and the atmosphere. This movement of air out of the lungs is classified as a passive event since there are no muscles contracting to expel the air.
Please help me for this question...
Scientific information that is hundreds of years old is fact and does not change.
True or False
Why?
Which descriptions apply to these two compounds?
Answer:
atoms and molecules
Explanation:
Matching: Classify the characteristics of the macromolecules in the list.
Adenine (A), cytosine (C), guanine (G), thymine (T)
2. Bread, rice, potatoes, pasta
3. Butter, vegetable oil, lard, egg yolks
4. Carbon - Water
5. Cholesterol, steroids, and cell membranes
6. Commonly called fats
A. Carbohydrates
7. Compose muscles, hormones, and enzymes
B. Lipids
8. Deoxyribonucleic acid and Ribonucleic acid
C. Nucleic acids
9.
Fish, milk, eggs, meat
D. Proteins
10. Form chains of polypeptides
11. Fructose, sucrose, maltose, lactose, galactose
Answer:
1. Proteins
2. Carbohydrates
3. Lipids
4. Nucleic acid
5. Lipids
6. Carbohydrates
7. Proteins
8. Nucleic acid
9. proteins
10. Lipids
11. Carbohydrates
Explanation:
Which is one of
the six fundamental elements that are found in living organisms?
Answer:
The elements are carbon , hydrogen , nitrogen ,oxygen , sulphur and phosphorus
...............
Answer: C
Explanation:
Exercise decreases the risk of catching a cold.
What is the Independent variable and dependent variable ?*
O Exercise
O Catching a cold
Time of day you exercise
5. A proposed set of statements or principles used to explain a group of facts or natural phenomena is a
law
question
set of data
conclusion
theory
Answer:
theory
Explanation:
A proposed set of statements or principles used to explain a group of facts or natural phenomena is a theory.
Can someone please help me on number 11
Answer:
what is number 11
Explanation:
Which best supports the part of the cell theory which states “the cell is the smallest unit of living things”?
Answer:
because it is the basic unit of life
Explain how fibrin protects the body
what is a common form of a single celled organism
Answer:
Bacterium
Explanation:
There are many different types of bacteria on the planet, and they are all unicellular prokaryotes. They are on my hands, on your hands, in the air, probably on my dusty-crusty laptop, too. A lot. Now that I think about it, I should probably clean off my keyboard
Why are liposomes important to the health of cells
Why does the pectoral girdle need to be flexible while the pelvic girdle needs to be rigid?
Answer:
Flexibility: pectoral girdle is more flexible-less ligaments, ball and socket joint is shallower
Security: pelvic girdle is more secure, deeper socket. there are more dislocated shoulders than dislocated hips
ability to bear weight: pelvic girdle can bear more weight-the pelvic girdle has bones that are fused (os coxa) and a joint with the sacrum. the pectoral girdle has a little bone called the clavicle connecting it to the body wall.
Explanation:
The pelvic gridle is rigid to protect internal organs and support body weight whereas pectoral gridle require to provide movement to upper limbs.
The girdles are part of the appendicular skeleton which is attached to upper limbs and lower limbs, The upper limbs attach to pectoral gridles and lower limbs attached to pelvic gridles.
1. The pectoral gridle:
connects your upper limbs to the bones along the axis of your body.The pectoral girdle has two bones clavicle, or collarbone and scapula, or shoulder blade.it has ball and socket joint that provide movement to the upper limb.2. The pelvic gridle:
made up of left and right coxal bones and sacrumattached to legs or lower limbs therefore, called hipbonessupports body weight and protect internal organsit is rigid needed to support the weight of the body.Thus, the correct answer is - The pelvic gridle is rigid to protect internal organs and support body weight whereas pectoral gridle require to provide movement to upper limbs.
Learn more about pectoral gridles:
https://brainly.com/question/20926776
interpret data
identify the problem
observe and record
arrive at a conclusion
make a hypothesis
test the hypothesis
A group of students discusses what they
believe will be the outcome of an experiment
they are about to conduct. Each student
records a statement that will either be
proven or disproven by the experiment.
Each member of the group carefully watches
as the experiment proceeds. One group
member writes down the comments of the
group as they call out what they see.
After the experiment is complete, the group
discusses their observations. They review their
notes and create a graph that shows the
results of the experiment. The group
discusses what these findings might mean.
Now that the group has decided on a
hypothesis, they are ready to proceed with
the experiment. As they work, the group is
cautious to test only one variable at a time
and to follow all directions carefully.
E
The group reviews their notes and the data
they have collected. After a short discussion,
they decide whether or not the original
hypothesis is correct.
A science group begins a discussion related to
what they have been studying in class. They
take turns posing questions they still have
about the topic. Together, they decide on an
experiment they would like to conduct. They
hope the experiment will answer some of the
questions they still have.
Scientific Process
The group reviews their notes and the data they have collected.
A
Definition of endoplasmic reticulum
Answer:
endoplasmic reticulum is a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane.
After lab, you start working on your post-lab conclusion assignment, which asks you to
expand upon knowledge you gained during the lab exercise. You didn't fully understand
the significance of the lab exercise, so you call your lab partner and ask them to help you
answer your post-lab conclusion questions.
Answer:
Explanation:
duh
What is DNA barcoding?
Answer:
A DNA barcode is a short, standard gene segment of an organism that has been identified in a gene bank, used to identify unknown species by comparison with the DNA sequence of the gene bank. .
The diagram shows a simplified version of how the blood moves around the body of an animal. Is the blood at point D oxygenated or deoxygenated?
Answer:
oxygenated
hope u got your answer
In the given diagram, point D is oxygenated blood, as it carries oxygen from heart to cells.
What is heart?The main organ of your cardiovascular system, a network of blood vessels that pumps blood throughout your body, is your heart.
It also collaborates with other bodily systems to regulate your heart rate and blood pressure. Your family history, personal health history, and lifestyle all have an impact on how well your heart functions.
The heart is located between the two lungs, slightly to the left of center, behind the breastbone in humans. It is supported by the diaphragm, the muscular wall that separates the chest from the abdominal cavity.
It's the muscle at the heart of your circulatory system that pumps blood throughout your body as your heart beats. This blood transports oxygen and nutrients to all parts of your body while removing waste and carbon dioxide.
Here, the red vessels are arteries while blue vessel is vein, arteries always carries oxygenated blood and vein carries deoxygenated blood.
Thus, the point D carries oxygenated blood.
For more details regarding heart, visit:
https://brainly.com/question/16566688
#SPJ2
WHAT IS BREEDING DEFINATION
Answer:
Breeding is sexual reproduction that produces offspring, usually animals or plants.
Explanation:
make me as brainleast.
HURRY
Which is true about a liquid but not a gas?
1. It has more internal energy than the solid state.
2. It will change shape and take the shape of its container.
3. It allows particles to move past each other relatively easily
4. It has close to a constant volume as pressure is applied to it.
Which of the following is a result of two continental crusts buckling and cracking? *
The result of two continental crusts buckling and cracking is San Andres Fault.
The San Andrés fault is a geological fault that is about 1,300 km long. This fault is located in the western part of the United States, specifically in the state of California, and reaches a part of Mexico.
The San Andrés fault arose as a result of the tectonic encounter between the North American Plate and the Pacific plate and their relative horizontal displacement.
A characteristic aspect of this fault is the great crack and buckle that is produced through a long territory. In addition, the earthquakes of 1857, 1906, 1989, 1940, among others.
According to the above, the correct answer is option D because it mentions the correct geological event, while the other options mention phenomena that are not related to the meeting of two continental plates.
Learn more in: https://brainly.com/question/737952
a group of cells that works together may form
Answer: Tissue
A group of cells that work together form a tissue. Your body has four main types of tissues, as do the bodies of other animals. These tissues make up all structures and contents of your body
Explanation:
Not MY WORK!!!!! I HOPE THIS HELPS
Answer:
answer is they may form a tissue.
una celula tiene mucho color verdoso, posee una forma poliédrica y presenta una pared rígida, ¿Que tipo de celula es?
Explanation:
PLEASE express yourself in English
explain how the freshness of the mushroom can be maintained using salt solution for a week.
Answer:
salt is a preservative that is used to preserve food. deep the mashroom into the solution
please help
1. Which of the following best describes the relationship between cells and living things in
general?
A. The larger the living thing, the larger its cells
B. The larger the living thing, the greater number of cells it contains
C. The number of cells in all living things is the same
D. There is one kind of cell, which all living things are made of
What does it mean if a science paper is peer-reviewed
and why is this significant?