The main structural distinction between the left atrium and the right atrium is that the left atrium has the _____, and the right atrium does not.
a. auricle
b. pectinate muscles
c. cardiac muscles
d. chordae tendinae
Given our understanding of cardiac anatomy, we can confirm that the main structural distinction is that the right atrium has the pectinate muscles, while the left one does not.
Firstly, we must address that there is a wording issue with the question. In reality, it is the right atrium that contains the pectinate muscles. The remaining options either correspond to both atrium, or neither.
The auricle is another word for ear. This is a cavity present on both the right and left atrium which allows them to extend their blood carrying capacity in situations of need. This option cannot be correct for the question since both atria possess one.
As for options b and c, cardiac muscle is present in the entirety of the heart. Cardiac muscle is the muscular cells that make up every wall and cavity of the heart and allow it to complete its unique function. Chordae tendinae, are fibers present in the ventriculus that attach the walls to the tricuspid valve, these are not present in either of the atria.
Therefore, we can confirm that though the wording is off, the intended correct answer is pectinate muscles, given that the right atrium is characterized by their presence, whilst the left atrium contains few, if any, of these muscles.
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Answer: Auricle
Explanation: Just took the test
which organism is made up of one prokaryotic cell?
Answer:
Bacteria
Explanation:
which joint is considered the most flexible joint in the body?
Answer:
The shoulder.
Explanation:
The shoulder is the most flexible joint in the body, making it the most susceptible to instability and injury. This mobility provides the upper extremity with tremendous range of motion. The shoulder join is also known as a 'ball-and-socket' joint.
Some researchers argue that the robust australopiths should be classified in a separate genus. What is that genus called
Answer: Researchers argue that robust Australopithecines should be classified in a separate genus called Paranthropus.
Explanation: The "robust" australopiths are a group of fossil hominins that existed in East and southern Africa between approximately 2.5 and 1.4 million years ago (Ma). They are referred to here as members of the genus Paranthropus, though considerable disagreement about their proper taxonomy persists. (credit to the internet)
what molecule makes instructions for proteins and is located inside a eukaryotic nucleus
Answer:
DNA stores that info
Explanation:
In eukaryotic cells (ex. plants and animals) the DNA is found in the nucleus of the cell. Structures called ribosomes build proteins (this process is called translation).
The molecule that is responsible for carrying the instructions for the formation of protein is mRNA, which is formed inside the nucleus.
The mRNA is known as the messenger RNA because it acts as a messenger, to carry the instructions required to create a polypeptide chain.
The mRNA is formed during the process known as transcription. The mRNA is formed by the molecule known as RNA polymerase.
During the process of transcription, the genetic information gets copied as a strand of nucleotides containing adenine, uracil, guanine, and cytosine, known as mRNA, which is formed inside the nucleus.
The molecule which act as a carrier of the genetic information for the formation of proteins is known as mRNA.
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what is the funtion of the cilia
The function of cilia is to move water relative to the cell in a regular movement of the cilia. This process can either result in the cell moving through the water, typical for many single-celled organisms, or in moving water and its contents across the surface of the cell.
What is the word for the skin having microscopic holes.
Body size in mice (length from nose to base of tail) is controlled in part by genetics. The following data shows the number of mice grouped by lengths:
Length Group Number of Mice
Very small (4-5 cm) 2
Small (5-7 cm) 6
Average (7-10 cm) 15
Large (10-12 cm) 7
Very large (12-13 cm) 1
Based on this data and your knowledge of inheritance patterns, identify the inheritance pattern that this trait follows in mice.
(1 point)
complete dominance
polygenic
incomplete dominance
pleiotropic
Answer:
polygenic!
Explanation:
Based on this data and your knowledge of inheritance patterns, identify the inheritance pattern that this trait follows in mice is polygenic.
What is Polygenic inheritance?Polygenic inheritance occurs when one character is controlled by two or more genes.
Often the genes are large in quantity but small in effect. Examples of human polygenic inheritance are height, skin colour, eye colour and weight.
Thus, option "B" is correct.
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The work of such researchers as Broca, Fritsch, Hitzig, and Ferrier demonstrated localized brain function, which was somewhat similar to the predictions made by ________.
The work of Broca, Fritsch, Hitzig, and Ferrier demonstrated localized brain function, which was similar to predictions made by phrenologists. Phrenology is a pseudoscience.
Phrenology is a pseudoscience aimed at measuring bumps on the skull to predict personality traits.
Eduard Hitzig and Gustav Fritsch demonstrated that electrical stimulation of specific areas of the cerebral cortex could trigger movement.
Broca's area is an area located in the frontal part of the left brain hemisphere discovered by Paul Broca, who observed how this area has a fundamental function for the generation of speech in humans.
Finally, David Ferrier was a neurologist who discovered a series of motor fields within the cerebral cortex of monkeys.
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Write a journal entry from the perspective of a particle of light, called a photon. Your story should follow the photon as it travels from a star in the Milky Way that is 25 light years away from Earth, all the way to the eye of a young person gazing up at the night sky through their bedroom window. Compose your entry in complete sentences. Be sure to answer these questions in your journal entry: • How long was the journey to Earth? • How fast did you travel? • Was your speed affected when you entered Earth’s atmosphere? If so, how? • Was your speed affected when you traveled through the glass of the window? If so, how? • What was the journey like to get to the retina?
Answer: i got your back
Astronomy (from Greek: ἀστρονομία, literally meaning the science that studies the laws of the stars) is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates beyond Earth's atmosphere. Cosmology is a branch of astronomy that studies the universe as a whole.[1]
Astronomy is one of the oldest natural sciences. The early civilizations in recorded history made methodical observations of the night sky. These include the Babylonians, Greeks, Indians, Egyptians, Chinese, Maya, and many ancient indigenous peoples of the Americas. In the past, astronomy included disciplines as diverse as astrometry, celestial navigation, observational astronomy, and the making of calendars. Nowadays, professional astronomy is often said to be the same as astrophysics.[2]
Professional astronomy is split into observational and theoretical branches. Observational astronomy is focused on acquiring data from observations of astronomical objects. This data is then analyzed using basic principles of physics. Theoretical astronomy is oriented toward the development of computer or analytical models to describe astronomical objects and phenomena. These two fields complement each other. Theoretical astronomy seeks to explain observational results and observations are used to confirm theoretical results.
Astronomy is one of the few sciences in which amateurs play an active role. This is especially true for the discovery and observation of transient events. Amateur astronomers have helped with many important discoveries, such as finding new comets.
Explanation:
Which of the following is the observed result of human exposure to a toxin?
I. Increased miscarriages
II. Gender imbalances
III. Increase in incidents of cancer
I, II, and III
II and III
I and III
I only
Answer:
| and |||
Explanation:
Gender Imbalances have nothing to do with exposure to toxin.
Plants obtain energy from
a. soil
c. anabolism
d. fertilizer
b. sunlight
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Answer:
Sunlight
Explanation:
Plants rely on the energy in sunlight to produce the nutrients they need. But sometimes they absorb more energy than they can use, and that excess can damage critical proteins. To protect themselves, they convert the excess energy into heat and send it back out.
Is DNA replication the same as cell replication? Or are they two different things?
DNA replication and cell replication both ate different but are connected to each other
in DNA replication the amount of genetic material become double but in cell division a cell divided into two parts and amount of protoplasm and cytoplasm both get half
HELP ASAP
What evidence shows that biological molecules on earth form naturally?/What evidence shows that biological molecules on Earth form naturally?
THIS AIN'T BUILD A B-
When does osteogenesis begin?
Answer:
a. When a fetus is 13-15 weeks old
Explanation: is correct
Mr. Fuad and Mr. Razak live as neighbours in a village near the sea. Mr. Fuad is a fisherman while Mr. Razak teaches at a school in the village.
Photograph 1 shows a set of breakfast for a healthy a man.
Boiled egg Sandwich Tea Watermelon
(a) Study the set of food. State whether the set is more suitable for Mr. Fuad or Mr. Razak. Justify your answer.
b) Suggest a breakfast set that is suitable for the individual that you did not choose in 6(a).
a) The set of breakfast having Boiled egg Sandwich Tea Watermelon is more suitable for Mr. Razak.
On a toasted bagel or English muffin, a fried egg, ham, and cheese make up a traditional egg sandwich. The presence of eggs may persuade consumers that this dish is a lean, protein-rich option for breakfast.Mr. Razak needs energy in the morning to kickstart his day. Eggs have a lengthy list of health advantages and are a rich source of protein, vitamins, calcium, etc. From promoting weight loss to increasing the body's levels of "good" cholesterol.b) Mr. Faud will need a heavier breakfast because he has to perform physical tasks all day which requires more energy. hence he should include 2 boiled eggs, yogurt, porridge, fruits and juice in his meal.
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A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, distilled water, equal to the volume of blood lost, is transferred directly into one of his veins.
What will be the most probable result of this transfusion?
A.
It will have no unfavorable effect as long as the water is free of viruses and bacteria
B.
The patient’s red blood cells will burst because the blood fluid is hypertonic compared to the cells
C.
The patient’s red blood cells will shrivel up because the blood fluid is hypotonic compared to the cells
D.
The patient’s red blood cells will swell because the blood fluid is hypotonic compared to the cells
Answer:
I think its B. because the patients red blood cells will burst because the blood is hypertonic compared to the cells
the number of phenotypes in a population is determined by
Answer:
The number of phenotypes produced for a given trait depends on how many genes control the trait.
Explanation:
Based on heredity, the number of phenotypes in a population is determined by the number of alleles for that triat as well as the nature of the alleles.
What is a phenotype?A phenotype is a physical expression of a gene.
The phenotype of an organism is influenced by the inherited alleles for that gene that an organism has.
Alleles are alternate forms of a gene.
Alleles may either be;
dominant,recessive, incompletely dominant or co-dominant.The phenotype of that organism will thus depend on the nature of the alleles of that gene or trait.
Therefore, the number of phenotypes in a population is determined by the number of alleles for that triat as well as the nature of the alleles.
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why renin is found more in case of babies
can someone answer it
Answer:
newborn infants. Bioassayable andimmunoassayable renin activities were elevated during the first six days after delivery. At 3 to 6 weeks of age, although elevated above that in adult control subjects, renin activity was lower than in the first postnatal week. Cord blood renin values were greater than those for maternal renin during labor. Renin substrate concentration was elevated in infants less than six days of age and also in 3- to 6-week-old infants. The enhanced activity of the renin-angiotensin system may contribute to the increased renal vascular resistance and the altered renal hemodynamics that occur in the newborn infant.
Answer:
It's the same so don't complain OK it is correct so don't worry about it as much ok
Which type of interaction is described below? ________ interactions occur between individuals of two or more different species.
What does a plant need to create a glucose molecule in photosynthesis?
Choose all correct answers.
carbon dioxide
sunlight
water
oxygen
Answer:
carbon dioxide, water, sunlight
Which of the following characteristics least relates to eukaryotic cells?
cells that do not have a nucleus or membrane bound organelles.
cells that have a nucleus and membrane bound organelles.
Fungi
Protists
how can the h. pylori bacteria survive in the human stomach?
Answer:
To survive in the harsh, acidic environment of the stomach, H. pylori secretes an enzyme called urease, which converts the chemical urea to ammonia. The production of ammonia around H. pylori neutralizes the acidity of the stomach, making it more hospitable for the bacterium
Explanation:
Rank the following according to size from smallest to largest: univierse, stars, galaxies
1) Star
2) Galaxies
3) Universe
Explanation:
Please mark as brain list
Answer:
In this order.
Star
Galaxy
Universe
atp molecules provide energy for cellular activities by
which cell type would contain the greatest number of mitochondria?
Answer:
It is generally believed that the cells that have the most mitochondria in them are the muscle cells.
Answer:
Muscle Cell
Explanation:
what occurs during a point (substitution) mutation?
Answer:
A point mutation or substitution is a genetic mutation where a single nucleotide base is changed, inserted or deleted from a DNA or RNA sequence of an organism's genome.
Explanation:
Hope this helps!
which farm animal has the largest eyes of any land mammal?
Answer:
The horse
Explanation:
The horse, being a farm animal, has the largest eyes of any land animal; the eyes of a horse are about 1.34 inches diameter wise.
I hope this helped!! ^v^
Which of the following is an example of a bond being traded on the secondary market?
Answer: D
Explanation: An investor sells a bond to another investor
An example of the secondary market is the investor sells a bond to another investor.
What is the secondary market?The secondary market is the market where the investor purchases and sells the securities.
An example could be the stock market.
Here the securities are traded when the company has been sold to provide on the primary market.
hence, An example of the secondary market is the investor sells a bond to another investor.
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In regular alcohol consumers, lipids get accumulated in the liver and are stored as small droplets in liver cells and this condition is known as ________.
Answer:
Fatty Liver
Explanation: