The Lub in “lub dub” is caused by the closing of the _______________ and _______________ valves.

Answers

Answer 1

Answer:

mitral and tricupsid

Explanation:


Related Questions

What are the major processes of Water Cycle?

Answers

Answer:

The water cycle is often taught as a simple circular cycle of evaporation, condensation, and precipitation.

Explanation:

hope this helps <3

Answer:

The Water Cycle consists of three major processes: Evaporation, Condensation and Precipitation.

A 30 year old woman complaining of tiredness

Answers

Answer:

Sleep more? Sleep earlier.

Explanation:

Brainliest pls

Answer:

it's a fatigue which is a result of overwork , poor sleep,boredom lack of exercise but older people experiencing fatigue is the first sign of showing that something is wrong in its body...

In which organisms is Lactic Acid Fermentation possible?
O Bacteria
0 Yeast
Both humans and bacteria
Both bacteria and yeast
O
Humans

Answers

Humans and bacteria

Temperatures increase in the________ and ______layers of the atmosphere.

Answers

Answer:

Thermosfere

Explanation:

Temperatures increase in the_Thermosfere __ and troposphere _layers of the atmosphere.

What is the elevation of point Z?

Answers

Answer and Explanation:

I think it's D. 250...

Answer:

The answer is (b) 220m

An insect that uses camouflage to hide from a predator is using a defensive behavior.


Please select the best answer from the choices provided

T
F

Answers

Answer:

True.

Explanation:

PLEASE HELP

The image shows an aquatic food web.
penguin
fish
squid
krill
phytoplankton
Which organisms will receive less energy if the krill are removed from the aquatic food web?
fish and penguin only
fish, squid, and penguin
penguin and phytoplankton only
penguin, squid, and phytoplankton

Answers

Answer:

fish, squid, and penguin

Explanation:

All obtain energy from the Krill

A price ceiling is not necessarily in the public's best interest because

Question 6 options:

a)

It can make otherwise available goods not available because of the low price.


b)

It's too "laissez-faire" for most people's taste.


c)

It always makes prices increase.


d)

All of the above.

Answers

Answer:

i think (a) is the answer

I need help with this?​

Answers

they are absorbed in the small intestine, but I am not 100% sure if it is in the beginning or the middle.

Help please! Brainly whoever gets it right!

Answers

Answer is A
The moon we see would be the only moon we can see because it’s orbits earth

Which structure is less likely to suffer severe damage during an earthquake: a high-rise, steel- frame hotel built on sediment, or a wood-frame house built on bedrock? Explain.

Answers

Answer:

The correct answer is - A wood-frame house built on bedrock.

Explanation:

An earthquake would damage a steel-frame building built on sediment in comparison of a wooden house built on the bedrock due to the fact that waves of an earthquake do not go through solid things easily such as the earth core or the bedrock land rather than reclaimed land or sediments.

So, the bedrock will shake less than the hotel or heave building built on sediment. A house that made up of wooden-frame would shake only whereas the steel-frame might damage more.

The process being used to develop these new varieties is most likely: (SC.912.L. 16.10)
Conversely, paper chromatography
natural selection
O genetic engineering
O direct harvesting

Answers

Answer:i believe the answer genetic engineering

Explanation:

. When an object is in motion, its what
is changing?

Answers

Is there any answer choices? If there’s not, then I think it’s position.

What are Dna and Rna’s main functions?

Answers

Answer:

one is sugar backbone I think I wish you luck

Answer:

DNA: contains the instructions needed for an organism to develop, survive and reproduce

RNA: primary role of RNA is to convert the information stored in DNA into proteins

Explanation:

what helps control heart rate and also conveys information between the spinal cord and other parts of the brain

Answers

Answer:

The cerebellum controls motor reflexes and is, therefore, involved in balance and muscle coordination. The brainstem connects and transmits signals from the brain to the spinal cord, controlling functions such as breathing, heart rate, and alertness.

Explanation:

hope this helps <3

What is the best comparison of density currents and upwelling in the ocean?

Answers

Answer:

The answer is A.

Explanation:

Fatima wants to teach her class what she learned about reflex actions. What should she include in herpresentation?

Reflex actions are involuntary responses.

Reflex actions involve decisions from the brain.

Reflex actions are slow responses
compared to other actions.

Reflex actions do not involve nerve
impulses.


Answer and I will give you brainiliest

Answers

They are involuntary

All of the following are types of dissociative disorders except __________. A. dissociative amnesia B. dissociative fugue C. dissociative identity disorder D. dissociative anxiety disorder

Answers

Answer:

D.) dissociative anxiety disorder

Explanation:

just did the check in on edge 2021! :)

Dissociative diseases are mental illnesses characterized by a loss of connection and continuity between ideas, memories, environment, activities, etc. Dissociative anxiety disorder is not included in this.

What causes a dissociative disorder?

Dissociative illnesses generate problems in everyday life because people with them avoid reality in uncontrollable and unhealthy ways.

Dissociation is an overwhelming response to sensory stimuli associated with a person's trauma.

Certain sights, sounds, scents, touches, and even tastes can trigger, a cascade of negative memories and feelings, even years after the traumatic incident or circumstances have passed.

It includes:

Dissociative amnesia.Dissociative fugue.Dissociative identity disorder.Depersonalisation disorder.

Thus, the correct option is D.

For more details regarding the dissociative disorder, visit:

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Evidence of evolution: episode questions

Describe the fossil record uncovered by Mosa and her crew from the simplest form of life to the most complex.

Plzzz answer quick

Answers

Answer: Yea

Explanation:

No

Embryo, fossil, and anatomy of primitive living organisms were compared with the present day organisms.

FossilsFossils are the dead and decaying remains of the organisms once existed.These fossils can be found deep beneath the earth crust.Mosa and her crew found that lots of life forms went extinct due to changes in the climatic conditions of the environment.

The embryos, fossils, and their anatomy helped to reveal the complexity of organisms from simplest to most complex forms.

Learn more about fossils:

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It is not always possible to measure every individual in a population; what is the name of the representative group?

a. a body of individuals
b. the organization
c. statistics
d. sampling unit

Answers

Answer:

d. sampling unit

Explanation:

Sampling unit:

Refers to the unit or group of elements that are selected from an original population during an investigation. The sampling unit might be composed of a statistical unit or a group of statistical units.

The statistical unit or element is the elemental unit that composes the target population.

The sampling unit is a basic concept to keep present during the development of the investigation project. It is the minimal unit of observation that will be used to take information about the variables of interest.  All the sample unit composes the population and is defined by an N, while only some representative sample units compose the sample, and are represented with an n.

So, the whole population can not be measured because of its size, or the individuals´ characteristics, among other many factors. So we need to take a random and representative sample or group of the population to proceed with our investigation. This sample or group is composed of some of the original population individuals, which are defined as "sample units".  

Why do many Africans not have indoor plumbing?

Answers

Answer:

This statistic shows the share of urban households with indoor plumbing in selected African countries in 2017. In South Africa, 60 percent of urban households had indoor plumbing at home, whereas the same was true for eight percent of urban households in Uganda.

In general, our brains are able to see _____ as fluid motion. 25 to 30 frames per second 32 to 36 frames per second 33 to 35 frames per second 22 to 28 frames per second

Answers

In general, our brains are able to see _____ as fluid motion.
25 to 30 frames per second

Viruses have many things in common with living organisms, but they are NOT actually considered living. Why?

Group of answer choices

They do not reproduce

They are not made of one or more cells

They do not contain genetic material

They make people sick

Answers

Y I believe it’s A because THEY CANNOT REPRODUCE THEMSELVES THEY NEED TO HIJACK OTHER CELL TO REPRODUCE

what is the ratio of elements found in carbohydrates?

Answers

Answer:

I believe it is a 1:2:1 ratio

Explanation:

Answer:

Carbohydrates are a class of chemical compounds composed of carbon, hydrogen, and oxygen in 1:2:1 ratio, respectively.

Explanation:

What molecule determines your eye color, enzyme production, and body
structure?

Carbohydrates
Starch
Fatty acids
DNA

Answers

Answer:

DNA is the molecule which determines our eye colour, enzyme production and body structure.

The determination of features of the body begins in embryogenesis. There are different stages to the development of these different features.

The molecule that determines your eye color, enzyme production, and body  structure is the DNA

The DNA is a macromolecule found inside the cells. The macromolecules carry the information that determines individual's make-up. The DNA contains genes that embodies how the eye colour turns out, the body structure and enzyme production. These information carried on genes enables the cells to become specialized to form these different parts and also to carry out their various specific functions.

Learn more about the DNA: https://brainly.com/question/13937132

L

• 11. Thinking about trophic levels, the type of energy we use from a natural resource comes through a transfer of what, which can also be classified as radiation?



Answers

Answer: The type of energy that we use from the natural resources comes through the transfer of solar energy.

Explanation: The energy from the sun is transferred to the producers, they covert the light energy or solar energy into chemical energy.

The energy is continuously used up in the ecosystem and is also added to the ecosystem by the producers. The energy is lost in the form of heat and it reaches the earth from sun in the form of solar radiation.

The energy in the ecosystem is lost in the form of heat at various trophic levels.

The producers transfers the energy to consumers and some of the energy is lost in the form of heat.

The flow of energy(radiation from sun to producers) in an ecosystem is continuous and its loss is also continuous in the form of heat.

During sexual reproduction, egg and sperm cells join to form a new individual. Each cell in a human contains
23 pairs of chromosomes (46 total chromosomes). How does the chromosome number of our species stay the
same from generation to generation during meiosis? Why doesn't the chromosome number double every
time a new generation is formed?

Answers

Answer:

1.The answer is that because of the process of meiosis and fertilizations

Explanation:

Which muscles, when contracted unilaterally, will produce lateral bend of the spine?

Answers

Answer:

Sternocleidomastoid is the muscle which when  when contracted unilaterally, will produce lateral bend of the spine

Explanation:

Sternocleidomastoid muscle is responsible for the turning of neck and its nodding. It consists of long muscles that are able to connect the three process of temporal bones i.e sternum, clavicle, and mastoid. Thus, this muscle can bend the spine laterally.

Does the existence of neurons in the body conflict with cell theory?

Answers

Answer:

no

Explanation:

Neurons are said to be the unit of the nervous system that is involved in the transmission of chemicals. No, they do not conflict with the cell theory.

What are neurons?

Neurons are said to be the unit of the nervous system that acts as the messenger that uses chemical and electric signals to transfer messages from various areas. It conducts messages from the brain and spinal cord to the body parts and vice versa.

Similar to the cell theory, neuron doctrine was proposed to explain the characteristics of the nerve cells. It explained the composition of the neurons from the fundamental unit of cells that have the same analogy and genetics.

According to the cell theory, the cell is fundamental, and similarly to the nerve doctrine, the cells make the basis of the nerve cells. They also arise from pre-existing cells that duplicate in the cell division phase of the cell cycle to produce two daughter nerve cells.

Therefore, the existence of the neurons in the body does not conflict with the cell theory.

Learn more about neurons, here:

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can birds urinates?​

Answers

yes they can urinate :)

Answer:

Yes they can urinate

Explanation:

They have a small hole where they can urinate out of

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