Match the following terms describing electrical events with the correct phases of the cardiac cycle.
Question Selected Match
The ventricular muscle cells depolarize at the start of this phase.
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.
The ventricular muscle cells repolarize right before this phase.
The cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase.
All Answer Choices
A. isovolumetric contraction
B. ventricular ejection
C. ventricular filling
D. isovolumetric relaxation
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.
Most fossilized bones have undergone the process of
A)unaltered preservation
B)carbonization
C)casting
D)perimineralization
Answer:
D. Perimineralization
Explanation:
After a bone, wood fragment, or shell is buried in sediment, it may be exposed to mineral-rich water that moves through the sediment. This water will deposit minerals, typically silica, into empty spaces, producing a fossil.
Why do melting ice caps make Earth warmer?
A. Ocean water cools off.
B. Albedo decreases.
C. Salinity of ocean water increases.
D. More solar energy is reflected.
Answer:
The correct answer is B. Albedo Decreases.
Lower albedo = more energy absorbed = warmer temperatures.
Let me know if this helps!
Answer:
Less Solar energy is reflected.
Explanation:
If those answers aren't up there
Describe how home heating and cooling has changed over time, and how it has remained the same.
Complete this DNA strand GTA ___ CCC if the opposite strand is CAT GCG GGG
Answer:
CGC
Explanation:
The pairs go
AT
GC
therefore if it's G then it's C
1. News Flash! Imagine that a giant plant has been discovered that reproduces by budding. The buds are growing. You are a reporter. Report on what happens next.
Answer:
U have to report on what u think is going to happen next in this event, think if it's going to be a good or a bad thing for the planet
Explanation
"Hello this is News Flash and we're about to show you something incredible that was just recently discovered by scientists. This plant regenerates from it's own buds can you beleive that, that means that the more it's buds spread the more plants grow. This is definitely great for the planet but could this be bad in a different way, you're going to know that in our scientific investigation, see you then "
A person who is interested in the hypothalamus and its functions might pursue a career in
neuroscience
gene therapy
endocrinology
sports medicine
Answer correctly Please this is my first time hehe
tyler plays tennis all day in the hot sun and drinks very little what effect will this behaviour have on the quantity and concentration of his urine? explain your answer
Answer:
Their urine will get highly concentrated due to the lack of water present. They will be more urea and other secretory products present in the urine than water.
often come off of oceans and effectively cool the surrounding area during the day.
A)
Snow
B)
Breezes
e
Radiation
D)
High pressure fronts
Why is it important to be patient when you change to a healthier diet? How long could it take before you see improvements?
Answer:
Because your body is used to eating foods that aren't healthy.
Explanation:
A sudden change in diet can surprise your body in a bad way. You could have odd bowel movements or gain mental problems like depression, or you could have head aches/fatigue. And your body isn't used to having the correct amount of nutrients all at one time. It'll take up to 1 to 2 months to see any changes (like weight gain or loss, or like how much energy you have during the day)
what is most likely to happen when water loses heat
Answer:
it will turn to ice
Explanation:
the potential energy in the molecules is reduced and they start to move alot slower, eventually they stick together and form ice
is this true or false?: Males are more likely than
females to express a x-linked recessive disorder
True
Sorry if im wrong
have a nice day.
what are the reason for which people deposit money in a bank ?
A father with type O blood marries a woman with type B blood who has a type O mother. What is the probability that the offspring of this husband and wife will be O? B? A? AB?
Answer:
Probably OB or ob or Ob or oB
Explanation:
Answer:
It’s highly unlikely that the offspring wi8kl be A or AB because there’s nothing to factor that in as a probabilit. The kid is more likely to be OB or B, with a slightly lower but still probable chance of having O.
Explanation:
Match
Solids
Liquids
Gases
Change of state of Matter
Particles are
tightly packed, but are
far enough apart to
slide over one
1 another
Occurs due to heating or
cooling of a substance (adding or
* removing energy)
have an
indefinite shape
and an indefinite
volume
Particles
tightly packed, vibrating
about a fixed position
Answer:
Particles are tightly packed, but are far enough apart to slide over one 1 another- Liquid
Occurs due to heating or cooling of a substance (adding or * removing energy)- Change of State of Matter
have an indefinite shape and an indefinite volume- Gas
Particles tightly packed, vibrating about a fixed position- Solid
Explanation:
The breaking down of glucose into two molecules; anaerobic process. Please help
Answer:
glucose is broken down in ten steps to two molecules of pyruvate which then enters the mitochondria where it is oxidized through the tricaboxylic acid cycle to carbon dioxide and water
What color is an index contouring line usually?
Answer:
hope that helps?
Explanation:
A contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value, so that the curve joins points of equal value. It is a plane section of the three-dimensional graph of the function f(x, y) parallel to the (x, y)-plane. In cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes. The contour interval of a contour map is the difference in elevation between successive contour lines.
What are two kinds of chemical properties of matter?
Ability to shine
Ability to burn
Ability to bend
Ability to rust
Explanation:
Summary. Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust.
Answer: Ability to burn and ability to rust
Explanation:
How many times does an oxygen molecule cross a cell surface membrane as it moves from the air into a red blood cell?
1. What is the purpose of transcription? Why does it have to occur?
Answer:
The goal of transcription is to make a RNA copy of a gene's DNA sequence. For a protein-coding gene, the RNA copy, or transcript, carries the information needed to build a polypeptide (protein or protein subunit). Eukaryotic transcripts need to go through some processing steps before translation into proteins.
Explanation:
Nitrogen is the most __________________________________ gas found in the earth’s atmosphere
Answer:
common/abundant
The photo shows a type of animal.
Which characteristic indicates that the organisms is an invertebrate?
A. It has radial symmetry
B. It has no back bone
C. It has an endoskeleton
D. It has bilateral
Answer:
c.it has no endoskeleton
Explanation:
invertebrates lack endoskeletons
Answer:
it has no back bone
Explanation:
please give brainly
Please help me please!
Answer:
c
Explanation:
I think,if the masses are large so....that mean the force is greatest...because a large masses have a lot of force of gravity...
The difference between an open and a closed circulatory system is...
Answer:
In the closed circulatory system, blood is confined to a heart and blood vessels, whereas in an open system, hemolymph (blood) moves from a heart through vessels into interconnected spaces called a "hemocoel."
Explanation:
An open circulation the blood is not blood vessels, it instead is pumped into a cavity called Hemocoel.
A closed circulatory system, the blood is pumped through vessels SEPARATE from the interstitial fluid of the body.
During DNA replication, a DNA strand that has the bases C T A G G T produces a complementary strand of DNA with the bases?
A. T C G A A C
B. G A T C C A
C. G A U C C A
Answer:
B
Explanation:
B because cytocine matches with guanine and adenine matches with tymine
Which phylum contains more than 10,000 living species?
Porifera
Echinodermata
Cnidaria
Answer:
Cnidaria
Explanation:
A scientific theory is an explanation supported by scientific evidence.
Answer:
Is this a true or false question?
Explanation:
The brain signals the body of an animal to move by transmitting electrical impulses through the neurons. An animal
is then able to walk or run because
F: the glands of the endocrine system work with the skin if the integumentary system.
G: the heart of the circulatory system works with the stomach of the digestive system.
H: the kidneys if the excretory system work with white blood cells of the immune system.
J: the muscles of the muscular system work with the bones of the skeletal system.
Answer:
J
Explanation:
The musculoskeletal system is what enables movement.
The brain signals the body of an animal to move by transmitting electrical impulses through the neurons, and the animal is then able to walk or run because the muscles of the muscular system work with the bones of the skeletal system that is present in option J.
What is the function of the neuron in muscle activity?The neuron stimulates the muscle for the movement because the muscle has receptors for the neurotransmitters, such as at the neuromuscular junction, and the neurotransmitters either stimulate or repress the function, depending on the type of neurotransmitter.
Hence, the brain signals the body of an animal to move by transmitting electrical impulses through the neurons, and the animal is then able to walk or run because the muscles of the muscular system work with the bones of the skeletal system that is present in option J.
Learn more about neuron function in muscle activity here.
https://brainly.com/question/28273549
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Which one of the following is made of angular gravel clasts?
a. conglomerate
b. sandstone
c. breccia
d. mudstone
Answer:
c) Breccia
HOPE IT HELPS!!
WHAT ARE THE THREE PRINCIPLES OF THE CELL THEORY?
Answer:
1. All living things have cells.
2. The cell is a basic unit of life.
3. New cells arise from existing cells.
Explanation: