Answer:
1. Isovolumetric contraction.
2. Ventricular filling.
3. Isovolumetric relaxation.
4. Ventricular ejection.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
The following terms describe the electrical events with the correct phases of the cardiac cycle in mammals (human beings);
1. Isovolumetric contraction: The ventricular muscle cells depolarize at the start of this phase. During this phase, the pressure in the atria is lower than the pressure in the ventricles while the pressure in the arteries is higher than the pressure in the ventricles.
2. Ventricular filling: During this phase, Na+ entry through the funny channels causes the pacemaker potential of SA nodal cells to gradually become less negative until it reaches threshold. It causes the atria to contract at the end of the phase.
3. Isovolumetric relaxation: The ventricular muscle cells repolarize right before this phase. During this phase, all of the four (4) cardiac valves are closed while all of the four (4) chambers are relaxed.
4. Ventricular ejection: The cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. Also, the atrioventricular (AV) valves are closed while the semilunar valves are open.
Which organelle is responsible for translating mRNA into a protein?
1. mitochondria
2. nucleus
3. ribosome
4. golgi apparatus
Answer:
3
Explanation:
ribosome
message is sent from nucleus to the ribosome
The broad waves of related waves is called: : Radiation Spectrum Force Energy please help
Answer:
The asnwer is spectrum
Explanation:
How is a polar molecule different from a nonpolar molecule?
A.polar molecules have charges separated like poles of a magnet.
B. Polar molecules have charges evenly distributed across their poles.
C. Polar molecules are attracted to the lipids of the phospholipids of the plasma membrane.
D. Polar molecules are always larger than nonpolar molecules.
Answer: I think its b
Explanation:
if not a
A polar molecule is different from a nonpolar molecule in the fact that a polar molecule has charges separated like the poles of a magnet. Thus, the correct option for this question is A.
What is a Polar molecule?A polar molecule may be defined as a type of molecule in which one end of the molecule is slightly positive, while the other end is slightly negative. For example, water is an example of a polar molecule.
Being a polar molecule, water is separated by a positively charged hydrogen atom and a negatively charged oxygen atom. Polar molecules are asymmetric in nature and significantly contain lone pairs of electrons on a central atom or atoms with different electronegativities bonded together.
Non-polar molecules are symmetric with no unshared electrons. These molecules have resulted from an unequal distribution of electron density.
Therefore, polar molecules have charges separated like the poles of a magnet. Thus, the correct option for this question is A.
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Q 13.34: Water needs in space flights are easily met through recycling waste water.
А
True
B
False
Answer:
true
Explanation:
because they reuse that water like they filter it
What are the TWO processes during decomposition?
Answer:
Decomposition occurs through two primary chemical processes: autolysis and putrefaction. They often occur in tandem, but one may predominate in certain conditions. Autolysis (or “self-digestion”) is the destruction of cells through the action of their own enzymes.
Explanation:
Answer:
Autolysis and Putrefaction
Explanation:
Please help I'm in a test...
The process that transport rocks, soils, and sediments to a different location is called _____.
A Weathering
B Erosion
C Deposition
Answer: B
Explanation: I had a test with this question and got it right
march the following changes in the environment with their effect on the ocean
Answer: thermal stress 1
Reduction in pH 4
Increased runoff 3
Sedimentation 2
Explanation:
What r the types of allergy??????
Answer:
of Allergies
Drug Allergy.
Food Allergy.
Insect Allergy.
Latex Allergy.
Mold Allergy.
Pet Allergy.
Pollen Allergy.
Explanation:
Answer:
food, flowers, touch, dirt etc/
Explanation:
Fill in the blank am i right on the second one by the way
Answer:
Explanation:
plant cells have chloroplasts, the organelle that contains a green pigment called chlorophyll, which produces food from sunlight
Actually, the first blank would be chloroplasts — they are an organelle found only in plants. The second blank would be chlorophyll, the green pigment found in chloroplasts.
The tortoise took 5 minutes to go 30 feet; how slow is the turtle?
Answer:
6 feet/minutesExplanation:
The tortoise took 5 minutes to go 30 feet; how slow is the turtle?
= 30/5
= 6 feet/minutes
The central dogma of molecular biology states that
1. DNA-protein-RNA
2. tRNA-mRNA-rRNA
3.DNA-RNA-protein
4. protein-RNA-trait
Answer:
3
Explanation:
From DNA we are able to get RNA (m and t) to make proteins
PLEASE HELP IM GIVING BRAINLIEST!!! THIS IS DUE SOON BTW!!
Instructions: Use the list of terms to fill in the blanks with the matching cell parts. Some terms are used more than once.
A geneticist crossed tall pea plants and obtained 971 tall pea plants and 315 short pea plants in the F, generation.
TT
What were the genotypes of the parents that produced the offspring in the Punnett square shown, it T is the allele for tall, and t is the allele
for short?
ATT
BTT
D. TITI
Answer:
BTT Esa es la respuesta gracias
Answer:
B. TT
Explanation:
I took the test
Which one of the following is not made of calcite?
a. chert
b. travertine
c. chalk
d. coquina
How do scientists learn about the age of the solar system and its planetary bodies? Select the two correct answers.
a. comparing the composition of the gaseous planets to the rocky planets
b. using radiometric dating of meteorites
c. measuring distances between planets
d. analyzing impact craters on planetary body surfaces
Answer: B, C
Explanation: Scientists use radiometric dating of meteorites and analyze the impact craters on planetary body surfaces to learn about the age of the solar system and its planetary bodies.
Using radiometric dating of meteorites and analyzing impact craters on planetary body surfaces are the two methods that tells us about the age of solar system.
The age of solar system and its planetary bodies can be find out by using radioactive dating techniques. Scientists have find out that the Solar System is 4.6 billion years old due to this technique. The other way to find out the age of solar system and its planetary bodies by counting the number of impact craters occurs on planetary body surfaces so these two methods provides information about the age of solar system and its planetary bodies
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In starches the glucose units are joined together by
Answer: glycosidic bonds
The glucose units in starches are joined together by α-1,4 glycosidic bonds.
Starch is made up of two types of polysaccharides: amylose and amylopectin. Amylose is a straight linear chain of glucose molecules linked by α-l,4 glycosidic linkages. Starches have a lengthy, chain-like structure because of the linear arrangement of their -1,4 glycosidic linkages.
Amylopectin is a branched chain of α-d-glucose molecules linked by α-1,6 glycosidic linkage. These bonds are located at the places where the starch molecule branches, and they contribute to the branching structure of starches. Starches are more water soluble than other forms of carbohydrates, such as cellulose, due to their branching structure.
Therefore, In starches, α-1,4 glycosidic linkage bind the glucose units together.
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Plz answer asap - As the universe "Expanded" what happened to the Local Groups of Galaxies?
Answer:
they ex-0 off
Explanation:
Answer:
I heard it exploded
Explanation:
can someone help with the pic
Answer:
A
Explanation:
Every cell has a cell membrane, but not every cell has a cell wall. Plant cells have both while animal cells only have cell membranes.
The brain is formed by a variety of nervous tissues and connective tissues. The tissues are highly organized and work together to complete a variety
of tasks
How is the brain classified?
А. tissue
B. organ <
C. organ system
D. organism
Which of the following characteristics evolved as a result of the evolution of a larger brain size?
adaptive human body type
use of symbols
walked upright
use of tools to get food
Answer:
blood
Explanation:
use food can help my brain or water can help work my brain use blood
Answer:
use of symbols
Explanation:
A larger brain allows for more intelligence. To use symbols, you need more intelligence
how long does it take for mitosis to complete? why will most of the cells you view be in interphase?
Answer:
Mitosis takes about 2 hours to complete :3
Most cells would be viewed in interphase because it's the most important part of the stage where G1, S, and G2 phase are there too :3
Explanation:
:3
HELP ME HURRY PLEASE
Answer:
people think science tests should be more hands on opposed to sitting down in on spot for hours. I think it should be hands on so kids can remember and have a fun time doing so.
Explanation:
(go into more depth and add more words.)
What are some similarities and differences between the two broad categories of cells
Answer:
Prokaryotes Vs. Eukaryotes
- Prokaryotes have a nucleoid, eukaryotes have a nucleus
- Prokaryotes do not have membrane bound organelles, eukaryotes do have membrane bound organelles
- Prokaryotes have a cell membrane, and so do eukaryotes
- Prokaryotes have ribosomes, and so do eukaryotes
the primary wave is the slowest wave among the seismic waves true or false
Muscles are made of muscle tissue. Muscle tissue is made up of
Muscle cells
Muscle bones
Muscle veins
Construct x such that a/x=x/b
Answer:
the x-axis drawn through (b−1,0). The intersection is at (b−1,ab).
Which enzyme is responsible for adding free nucleotides to the new DNA strand during replication?
A. DNA polymerase
B. Helicase
C. RNA polymerase
Which trait is not inherited?
A. The long length of a person's fingers
B. The large size of a person's ears
C. The freckles on a person's cheeks
D. The ability to speak Spanish
Answer: D. The ability to speak Spanish.
Explanation:
No one is born already speaking. Speaking a language is a learned behavior.
Answer: d ability to speak Spanish
Explanation: I help ;)
I need help now!!
Which of the following best describes why a cell would not be able to reproduce if its
nucleus were damaged?
A. The nucleus is responsible for creating the sugars needed to perform cell division.
B. The nucleus is responsible for creating the energy used to perform cell division.
C. The nucleus is responsible for housing the genetic information needed for cell
division.
D. The nucleus is responsible for letting the materials in that are needed for cell division.
Answer:
B
Explanation:
I don't know...but I think the answer is B
Explain how the digestive, respirtory, circulatory, and excretory systems work together in order to maintain homeostasis?