Answer: c
Explanation:
When observing an ECG, you will see many different deflections from baseline known as waves. These deflections represent various electrical events taking place in the heart that give rise to the mechanical events that help move blood. In addition to the waves that can be observed, there are flat lines between waves and successive cardiac cycles called segments that also represent particular electrical events that take place in the heart. Finally, certain combinations of waves and segments, known as intervals, also identify important events recorded by the ECG. Match each of the following events with the correct phase of an ECG. Drag the terms on the left to the appropriate blanks on the right to complete the sentences.
A. P wave
B. ST segment
C. QRS complex
D. PR segment
E. T wave
F. QT Interval
1. Atrial depolarization_____.
2. The ventricles are in their depolarized state____.
3. Total time it takes for the ventricular muscle to depolarize and repolarize____.
4. Ventricular depolarization____.
5. Conduction through the atrioventricular (AV) node____.
6. Ventricular repolarization____.
7. Conduction through the atrioventricular (AV) bundle____.
Answer:
1. Ventricular depolarization −−QRS complex
2. Total time it takes for the ventricular muscle to depolarize and repolarize −−QT interval
3. Atrial depolarization −−P wave
4. Conduction through the atrioventricular (AV) node −−PR segment
5. Ventricular repolarization −−T wave
6. The ventricles are in their depolarized state −−ST segment
7. Conduction through the atrioventricular (AV) bundle −−Q wave
Explanation:
ECG or electrocardiogram is the graphical representation of the heart's rhythm and electrical activity measured by electrical signals. The contraction of the heart shows electrical activity.
There are various deflections shows from baseline and known as specific waves and there are also some flat lines between waves called intervals. This atrial depolarization is called P wave and ventricular repolarization called T wave and the time between ventricular muscles depolarization ( QRS complex) and repolarization is QT interval. Conduction through the atrioventricular (AV) bundle is known as Q wave.
What is the importance of negative chemotaxis
Answer:
Chemotaxis is the directed migration of cells in response to concentration gradients of extracellular signals. ... In multicellular organisms, it ensures that the right cells get to the right place at the right time during development, and plays an essential role in processes such as wound healing and inflammation [2, 3].
Which situations would be most likely to engage the anterior cingulate cortex?
Answer:
Which of the following situations would be most likely to engage the anterior cingulate cortex?
A waiter walks over to your table at a restaurant and holds an open menu in front of you.
You walk into the elevator of your apartment building and press the button for your floor.
You enter your classroom and find someone sitting in your usual seat.
A good friend asks you to remind him of your telephone number.
Explanation:
In order to meet the demand of the surrounding environment by adjusting the motor outputs from the brain to the environments ,a part of the emotion control part of the brain( limbic system) called the anterior cingulate cortex is responsible for this.
Anatomically, the limbic system is made up of the primarily the amygdala, hippocampus, thalamus, hypothalamus, basal ganglia and cingulate gyrus.
Based on the this its(anterior cingulate cortex) functions are formation of emotion in the limbic system, and possessing of memory and learning.
it is also a major parts of of pain networks for pain modulation and perception.
Therefore whenever there is change in the environment from the prestored condition in the brain,(e.g the usual seat in the class room occupied above) the anterior cingulate cortex adjust the motor input from the brain to adapt to the new environment to take an action,whih in this case leads to the reclaiming of the seat or any other necessary proactive action.
When one organism indirectly benefits from another, it is termed as ______
That should be Commensalism
HELP please
Youngest to oldest
Answer: The youngest would start from the bottom the oldest would be the very top
Explanation: so let me show you why. at the mid-atlantic ridge there is more and more crust being made in the midle. As it grows the old crust that got push up gets pushed up wards. and is stacked with the rest of the other crust. the image i put with this should help, a little bit more. I this helps.
Destin Benning: Attempt 5
Question 6 (2 points) ✓ Saved
According to the base-pairing rules for DNA, which of the following statements is
not true?
A always pairs with T.
C always pairs with G.
Talways pairs with G.
Answer:
T always pairs with G
Explanation:
According to the complementary base pairing rule as postulated by Chargaff, an Adenine base (A) will always hydrogen pair with a Thymine base while Cytosine base (C) will always hydrogen pair with Guanine base (G) in a DNA molecule.
That is; A - T and G - C
Hence, based on the question, the pairing of Guanine and Thymine is incorrect.
PLEASE HELPP
A body is found lying on the ground, but lividity is present only in
the feet. It is deep purple in color. Investigators believe that the
victim was moved after death. Assuming environmental
conditions are average, which other conclusion might be drawn
from investigators working the scene?
M. The person has been dead less than 2 hours
N. The person has been dead at least 8 hours
0. The person has been dead less than 30 minutes
P. There is not enough information to determine
possible TOD
Answer:
I think the answer is that the person is dead less than two hours ago.
HELP ASAP PLEASE
Indoor air pollutants can be dangerous because the air pollutants stay in small space rather than circulating throughout the atmosphere. Which of these choices is an example of an indoor air pollutant?
A. Methane gas
B. Vehicle exhaust
C. Building materials
D. Industrial emissions
Indoor air pollutants can be dangerous because the air pollutants stay in small space rather than circulating throughout the atmosphere. Option C is the correct answer.
What is the methane gas ?It is the gas that is produced by the cow dung and the gas is produced by the various chemical reactions in it.
Building materials pollution can be reduced out by many ways. Here are a few examples:
Low-VOC Paints: Volatile Organic Compounds (VOCs) are chemicals found in many paints, which can emit harmful fumes into the air for years after the paint has dried. Low-VOC paints contain fewer or no harmful chemicals, reducing indoor air pollution and improving air quality.
Air-Purifying Plants: Certain indoor plants, such as peace lilies, spider plants, and Boston ferns, can help remove harmful pollutants from the air. These plants absorb pollutants such as formaldehyde, benzene, and xylene, improving indoor air quality.
Green Roofs: Green roofs are roofs covered in vegetation that can help absorb pollutants from the air, reducing air pollution in urban areas. Green roofs also provide insulation, reducing energy costs, and can help mitigate the urban heat island effect.
Therefore ways like these should be adopted.
Learn more about air pollution at :
https://brainly.com/question/30489829
#SPJ7
what muscle moves the first toe
Answer:
Abductor hallucis
Explanation:
Abductor hallucis: A muscle on the inner side of the foot that runs from the big toe to the heel, it pulls the big toe, or hallux, away from the body. Tibialis anterior: This muscle runs from the tibia to the first toe, and helps make walking possible by flexing the foot upward and turning it inward.
healthline dot com
What is the bottom layer in the soil?
topsoil
parent rock
humus
subsoil
Answer:
my answer is: subsoil
Explanation:
Answer:
Parent rock, also now as bedrock
Explanation:
Which of the following is true of Mendelian inheritance
A. If a dominant allele is present, the recessive allele won’t be seen
B. If a recessive allele is a present, the dominant allele won’t be seen
C. Both recessive and dominant alleles show if present
The correct option is A. If a dominant allele is present, the recessive allele won’t be seen.
The dominant allele is the one which appear, and the recessive one isn't shown.
For example - If a person has 2 alleles of eye colour as B ( black ) and b ( brown ), in which black is dominant and the brown one is recessive, then the person will have black eye colour because only dominant allele shows its characteristics.
_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
Answer:
A
Explanation:
Following are assertion and reasoning questions. Read the two statements labelled as A and R. Pick any of the
four options given below :
a. A and R are true and R is the correct explanation of A.
b. A and R are true but R is not the correct explanation of A.
c. A is true but R is false.
d. Both A and R are false.
1. A: Cell wall is present in plants.
R: Cell wall acts like a layer of protection to the plant cells as plants don't move.
2. A: Cell membrane is semipermeable.
R: It allows only certain molecules to pass through it.
3. A: Bacteria are prokaryotes.
R: A prokaryote is a typically unicellular organism that has a nuclear membrane-enclosed nucleus.
4. A:Nucleus is called the control center of the cell.
R: It is located in the center of the cell.
5. A: Plastids are resp sible for
R: They contain chlorophyll that traps sunlight.
Answer:
1,. d
2,.a
3,.b
4,.a
5,.b
In regards to the question proposed to our class (included above) during our genetics unit on whether
children of married identical twins will end up being identical twins themselves, my claim is:
Answer:
will this work or help?
Explanation:
Multiple births can include fraternal or identical multiples ... This can happen if your body releases multiple eggs and ... Are a twin yourself or have twins in your family.
Researchers think the cheetah population in Africa experienced extremely low numbers around 10,000 years ago, and then also again around 100 years ago. During both times, the low numbers rebounded back. Predict the consequence of this on the cheetahs of today.
a. Cheetahs are a very resilient population and unlikely to become extinct.
b. Cheetahs today are the strongest and fastest cheetahs ever.
c. Cheetahs today have very little genetic variation.
d. Cheetahs today are slower than those before the population fell.
Answer:
Cheetahs are a very resilient population and unlikely to become extinct.
Explanation:
LH Gunderson (2000) Defined ecological resilience as "the amount of disturbance that an ecosystem could withstand without changing self-organized processes and structures."
When a population is resilient, it tends to bounce back after major perturbations.
For instance, the Cheetah population was at the brink of extinction around 10,000 years ago, and then also again around 100 years ago yet the population was able to recover at both periods and never went extinct.
This implies that Cheetahs are a very resilient population and unlikely to become extinct.
Answer:
c. Cheetahs today have very little genetic variation
Explanation:
Genetic drift is an evolutive force. It is the random change that occurs in the allelic frequency of a population through generations. Its effects are harder in a small-sized population, meaning that the magnitude of this change is inversely related to the size of the original population.
Genetic drift results in some alleles loss -including the beneficial ones-, while some other alleles get fixated. Low-frequency alleles are the most likely to be lost. The changes produced by genetic drift accumulate in time and results in a loss of genetic variability within a population.
Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure -bottleneck effect- or because of a population split -founder effect-. The bottleneck effect most likely affects smaller populations.
In the exposed example, the low numbers of cheetah around 10,000 years ago, and then also again around 100 years ago, might have been due to some natural disaster or extensive hunting that acted as a pressure that significantly reduced the number of animals. Probably, the population experienced one or many small-sized generations. Even though the low numbers rebounded back, the survivors did not have the whole genetic pool of the original population, meaning the genetic diversity might not have recovered. When the small groups increased in size, they had a genetically different composition from the original one. There is a reduced genetic variability, with a possibility of developing a peculiar allelic component. If the survivors in the population carried or developed a mutation, probably this mutation passed from generation to generation. It might involve even more individuals each time and increase the probability of developing a genetic disease.
explain why roots need to use to different methods to absorb water and ions
Answer:
m kemc
Explanation:
kmdefe
When it was time to go outdoors, 3-year-old Casandra said she didn’t want to play and headed for her locker. At the teacher’s gentle insistence, Casandra reluctantly joined the other children on the playground. Tears rolled down her cheeks when the teacher boosted Casandra onto a swing seat and began to push her. The teacher stopped the swing and helped Casandra off. She held her closely for a few minutes and then asked why she was crying. Casandra initially denied that anything was wrong. However, when the teacher persisted, said she "had fallen the night before and hurt her bottom."
The teacher took Casandra inside and asked to see where she had been hurt. When Casandra pulled down her shorts, the teacher noted what appeared to be a large burn with blisters approximately 2 inches in length by 1 inch in width on her left buttock. Several small bruises were also evident along one side of the burn. Again, the teacher quietly asked Casandra how she had been hurt, and once again she replied that she "had fallen."
What actions should Casandra’s teacher take?
Answer:
casandra was scared around others
Explanation:
in the passage i notesed that she went to her locker and started crying
Answer: 1. Casandra's teacher should take her to the nurse and just tell the nurse that she got hurt in the playground 2. The teacher should gather more evidence until she knows that something is going on because she can't prove that something is really happening 3. She shouldn't tell the parent yet because they would probably accuse the teacher of doing it 4. If it was the first time , I would feel bad for the girl and just tell her to be careful but if it kept happening, I would tell the principal and her parents and I would feel angry
Describe oligospermia
Explanation:
magsagot ka ng iyo tang ina mo bobo
What does an H-R diagram relate a star's temperature to? a. the amount of heat created by the star c. the type of star b. the elements the star contains d. the star's absolute magnitude Please select the best answer from the choices provided A B C D
Answer: A. The amount of heat created by the star.
Explanation: The Hertzsprung–Russell diagram, abbreviated as H–R diagram, HR diagram or HRD, is a scatter plot of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their stellar classifications or effective temperatures. Your Welcome
Que cosas podemos hacer con el oro
Many factories release carbon dioxide directly into to atmosphere. The carbon dioxide would be considered a(n) __________.
A)
primary pollutant
B)
placer deposit
C)
invasive species
D)
secondary pollutant
E)
scrubber
Answer:
I think it should be primary pollutant.
Explanation:
But what I'm sure of is that too much carbon dioxide released into the air is bad for both the biotic and abiotic factors.
Which of the following are considered gases?
Check all that apply.
A. Helium
B. Air
C. Wood
D. Oxygen
E. Gravity
Answer:
Oxygen, Air And Helium.
Which of the following materials is a good choice for a greenhouse framework?
wood
steel
stone
aluminum
Answer:
aluminum
Explanation:
Eukaryotes evolved after prokaryotes and eukaryotes have a nucleus
that surrounds the DNA.
O True
O False
Answer:
True
Explanation:
How is the position of each of the following parts of a plant related to its function?
A.Stigma
B. Petal
C. anther
Explain the difference between inter-cooperation and intra-cooperation between species.
Answer:
In evolution, co-operation is the process where groups of organisms work or act together for common or mutual benefits. It is commonly defined as any adaptation that has evolved, at least in part, to increase the reproductive success of the actor's social partners. For example, territorial choruses by male lions discourage intruders and are likely to benefit all contributors.
This process contrasts with intragroup competition where individuals work against each other for selfish reasons. Cooperation exists not only in humans but in other animals as well. The diversity of taxa that exhibits cooperation is quite large, ranging from zebra herds to pied babblers to African elephants. Many animal and plant species cooperate with both members of their own species and with members of other species.
Explanation:
I think?!
What is an atomic number and atomic mass???
Answer:
The number of protons determines an element's atomic number and is used to distinguish one element from another
Explanation:
Together, the number of protons and the number of neutrons determine an element's mass number.
What kind of information do ice cores contain?A.Evidence of volcanic eruptions.
B. All answers.
C. Concentration of CO2.
D.Concentration of methane.
which of these statements would be accurate in their explanation of the formation of new organs and a whole plant from an original leaf
Answer:
where is the statement..........
Answer the following using directional terms specific to the dentition. a Your canine is _______________________________________ relative to your first molar. b Your third molar is __________________________________ relative to your second molar. c The cheek side of the tooth row is the ______________________________ side. d Your lateral incisors are _________________ relative to your central incisors. e The tongue side of the tooth row is the ____________________________________ side. f Where your opposite tooth rows meet (to chew) is the _______________________________ surface.
Answer:
The correct answer is - a. mesial, b. distal c. buccal d. distal e. lingual f. occlusal.
Explanation:
Mesial is the surface near the midline of the face, In dentistry, the canine is mesial to the first molar which means it is the middle of the face. The third molar is distal to the second molar.
Distal is the backside of a particular tooth in dentistry. The cheek side of the tooth known as the facial surface for the front teeth in dentistry. Lateral incisors are distal to the central incisors. Lingual is the part of the tooth near the tongue. The chewing surface of posterior teeth is also known as the occlusal.
The epicenter of an earthquake is located 6,500 kilometers away from a seismic station. If the
first S-wave arrived at this seismic station at 1:30 p.m., at what time did the first P-wave arrive?
A)1:20 p.m.
B)1:22 p.m.
C)1:38 p.m.
D)1:40 p.m.
Explanation:
the epicenter of an earthquake is located 6500 kilometers aways from a seismic station .