The motion scheme of conscious motion is Impulse -> receptors / senses -> sensory nerves -> brain -> motor nerves -> effectors / muscles.
Further Explanation
the nervous system is one part of the coordination system that regulates the body's activities through rapid electrical stimulation. Components of the nervous system consist of nerve cells (neurons), the central nervous system, and the peripheral nervous system.
Nerve Cell Structure (neurons)
There are 7 parts of the structure of nerve cells that need to be known:
1. Dendrites are relatively short, branched cytoplasmic lines and function to receive stimuli to be sent to the cell body.
2. Perikarion, in this cell body stimuli that were previously sent, begins processing.
3. Axon is a long cytoplasmic outline and serves to deliver excitatory. Axon length of about 1mm-1m. The first end of the axon is called the hillock axon, while the end end of the axon is called the terminal axon.
4. Schwann cells are supporting nerve cells in the form of fat which functions to produce myelin sheath.
5. Myelin sheath is a part of the nerve that functions to protect axons and provide nutrients.
6. Ranvier nodes, which play an important role in accelerating the delivery of stimuli.
7. Synapses are the link between one neuron and another neuron. Also, synapses act as a meeting point between the axon ends of one neuron and the dendrites of other neurons or connections to muscles and glands.
Based on its shape, nerve cells are divided into Multipolar Nerves, Bipolar Nerves, and Unipolar Nerves. Multipolar nerves have one axon and two dendrites, but they can also be more. Examples are in the motor nerves in the brain and spinal cord. Whereas the Bipolar Nerve has two lines consisting of dendrites and axons, such as ear, eye, and nose receptors. Unipolar nerves are bipolar neurons that have only one outstretched cell body because their axons and dendrites are fused. Examples of unipolar nerves are neurons in the embryo and photoreceptors of the eye.
Stimulation or impulses are messages received by the receptors or the body from the outside environment, then carried by neurons or a series of electrical pulses that circulate nerve fibers. Examples of impulses include changes in temperature, pressure, odor, aroma, sound, objects, and various flavors such as salty, sweet, sour, and bitter. Impulses received by the receptor and delivered to the effector can then cause movement. movement can be divided into two types, namely conscious motion, and reflex motion. Unconscious motion is a movement that occurs as a result of deliberate or conscious. For example the movement of holding a book when you want to study, or when picking up a pencil. While reflex motion is involuntary or unconscious motion.
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Details
Grade: High School
Subject: Biology
keywords: the nervous system, stimulation or impulses
how can what you see can impact other human body systems?
Positive ions from a base and negative ions from an acid form a ________
Answer:
acid form
Explanation:
What is 3 reasons a species may become extinct?
Arrange these energy sources from highest to lowest percentage of worldwide use.
Fossil fuels
Nuclear power
Geothermal power
fossil,nuclear,geothermal
The correct order of arrangement of energy resources from highest to lowest usage world wide is fossil fuels, nuclear energy and geothermal energy.
A fossil fuel is a energy source formed by the dead remains of living organims over millions of years through the natural process. It includes the coal, petroleum and the natural gas which are the highly used energy resources all over the world. Nuclear energy is the energy generated during the fission or fusion of nuclear reactions which is used to generate electricity. It is one of the low carbon power methods to generate electricity. Geothermal energy is the thermal energy or the heat energy stored in the earth which is used to produce electricity.
Thus, fossil fuels forms the first energy resource to be highly used worldwide.
why is the longer chromosome pair used to model crossing over?
The reason is because using a longer chromosome pair would help the learner to see the pattern in the spread out
Explanation;Cross-over is the process that takes place in meiosis process of cell division, where a cell in the gonads divides in two phases to yield four daughter cells that have half the genetic composition as the parent cell.Cross-over occurs in prophase I of meiosis I, where non-sister chromatids of the homologous chromosomes joins at a point called chiasmata and exchanges the segment of chromatids, this ensures genetic variation among organism. Using longer chromosome to show the model of cross-over ensures that the pattern in the spread out is clearly visible to the learner.Which of the following best explains why vultures are NOT decomposers?
Vultures stalk their prey before killing and eating it.
Vultures do not break down wastes, and only consume meat.
Vultures only eat plants, making them primary consumers.
Vultures only pick at bugs, grub, and other microscopic organisms.
Answer:
Vultures do not break down wastes, and only consume meat.
2. While looking at a cell under a microscope, a scientist is able to see a biological molecule. This molecule is a nucleic acid with a ladder structure and contains the nitrogenous bases adenine, thymine, cytosine, and guanine. Based on this information, what conclusion can the scientist draw regarding this nucleic acid?
(A)The nucleic acid is DNA and would be found in the cell’s nucleus.
(B)The nucleic acid is DNA and would be found in the cytoplasm.
(C)The nucleic acid is RNA and would be found in the cytoplasm.
(D) nucleic acid is RNA and would be found in the cell’s nucleus. ...?
The correct answer is A
The scientist can determine that this nucleic acid is a DNA molecule, because it contains Thymine, which does not occure in the RNA molecule. The RNA molecule contains Adenine, Guanine and Cytosine just like the DNA, but unlike the DNA it contains Uracil, not Thymine.
Secondly, the scientist can say with certainty that this DNA molecule is surrounded by a nucleus based on the structure of the nucleic acid described. Only eukaryotic cells have ladder structure. The prokaryotic cells have circular DNA and do not have any organelles, like the nucleus. Therefore, from the ladder structure of the DNA the scientist can see that the cell has a nucleus.
What are the major factors that influence the rock cycle
the probability that the offspring will be brown colored cat with a long tail is ___
a.25%
b.50%
c.75%
d.100%
The correct answer is option a. 25%.
We need to find out the brown colored cats with long tail.
So, the genotype of the individual must have atleast one B allele and ss allele.
From the punette square given above
The number of offspring having Bbss or Bsbs is 4.
Total number of the offspring is 16.
So, the probability of the brown cat with a long tail is [tex]\frac{4}{16} =\frac{1}{4}[/tex] =25%.
Hence, the brown cat with a long tail are 25% of the total population
What often happens to rocks that undergo chemical weathering?
A. They form crystals.
B. They produce acids.
C. They become stronger.
D. They crumble more easily
Why is a year on saturn so much longer than a year on earth?
What gives the rise to the cohesiveness of water molecules? is it hydrogen bonds?
Hydrogen bonds are responsible for the cohesiveness of water molecules. Cohesiveness is the tendency of molecules of a substance to stick together. In water, the molecules are held together by hydrogen bonds.
Hydrogen bonds are weak chemical bonds that form between the hydrogen atom of one water molecule and the oxygen atom of another water molecule.
The hydrogen bonds between water molecules are very weak, but they are very numerous. This means that a large number of water molecules are held together by these weak bonds, which gives water its cohesiveness.
The cohesiveness of water is a very important property that has many implications for the physical world.
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How is the DNA in a prokaryote different from the DNA in a eukaryote?
A. Eukaryotes do not have alleles.
B. Only prokaryotes are diploid.
C. Prokaryotes do not have genes.
D. DNA is in a nucleus in eukaryotes.
Answer: The correct answer is D) DNA is in a nucleus in eukaryotes.
Prokaryotes are those organisms that lack a well defined nucleus and membrane bound subcellular organelles (like endoplasmic reticulum, golgi complex, mitochondria). The genetic material lies in the cytoplasm of the cell in these organisms.
Example - Bacteria like E.coli.
On the other hand, eukaryotes are those organisms that contain a well defined nucleus that possesses the genetic material (DNA). These organisms also contain membrane bound subcellular organelles.
Example - Plants and animals.
The DNA (Deoxyribose nucleic acid) of the eukaryotes is different from that of prokaryotic DNA based on their nuclear structure, a number of a chromosome, their binding protein, and selective permeability.
Further Explanation:
The difference between prokaryotic cells and Eukaryotic cells are listed in Table 1 attached below:
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Answer Details:
Grade: High School
Subjects: Biology
Topic: Structure of DNA
Keywords:
Eukaryotes, prokaryotes, chromosome, protein, cytoskeleton, membrane, histone, permeability, nucleus, condense, DNA, tetramers
Which of the following did not occur during the Cenozoic era?
A. Climate change
B. The formation of the ozone layer
C. Volcanic outgassing
D. Advancing ice caps
Answer:
Option (B)
Explanation:
When the initially occurring aquatic organisms such as the blue-green algae started to use the solar energy in order to convert the water molecules and carbon dioxide and converting them into organic compounds as well as the molecular oxygen (O₂). This is known as the photosynthesis process that produced a significant amount of oxygen in the atmosphere. These oxygen molecules, as absorbs the UV radiations emitted from the sun, it breaks the oxygen molecules and forms a single atom of oxygen. These atoms then again is added to the molecular oxygen and forms the ozone (O₃) molecule.
This is how the ozone layer has formed about 2 billion years ago.
Thus, the ozone layer did not form during the Cenozoic era.
Hence, the correct answer is option (B).
Compare and contrast the cell walls of fungi and plants. (PLEASE EXPLAIN)
1) Both cell walls provide structural support but fungi is made of polysaccharides and chitin and plants are made of cellulose.
2) Both cell walls provide protection but fungi are made of cellulose and plants are made of polysaccharides and chitin.
3) Fungi cell walls are made of lipids and plant cell walls are made of nucleic acids.
4) Fungi cell walls and plant cell walls have structures called hyphae.
Correct answer: A) Both cell walls provide structural support but fungi is made of polysaccharides and chitin and plants are made of cellulose.
The plant cell wall is made up of cellulose. It is a complex carbohydrate that is used for the protection and provides structural support to plants. The cell wall of plants has chloroplast.
While the cell wall of fungi does not have chloroplast, they possess a rigid layer of complex polysaccharides called as chitin. It is also known to be found in the exoskeleton of insects and it is known to provide strength to the fungal cell wall.
Hence, the correct answer would be option A.
which Mineral properties depend on composition a. structure b. luster c. cleavage or d. streak?
what hormone that causes a decrease in blood glucose
Which of the following would be made entirely of renewable resources?
need help ASAP
For the past 20 years, the population of the invasive Asian Carp in the Mississippi River has skyrocketed while populations of native species have declined. Which of the following conclusions provides the best explanation for this phenomenon?
a. The carp out-competed the native species for food and space.
b. The food sources preferred by the carp increased.
c. The native species contracted a virus that the carp were immune to.
d. The native species migrated to new areas, while the carp remained. ...?
I think that the answer is A.
The carp out-compete the native species for food and space.
As an invasive species. Some species of Asian carp cause harm when they are introduced to new environments. The black carp feeds on native mussels and snails, some of which can be already endangered. Grass carp can alter the food webs of a new environment by altering the communities of plants, invertebrates, and fish.
Many plants such as orchids are grown by a technique called tissue culture. Small pieces of plant tissue from a leaf, stem, or root of a mature plant are placed in a medium that contains the proper nutrients. The cells first form a mass of undifferentiated cells, from which tiny roots, stems, and leaves eventually grow. How do the plant cells placed in a medium for tissue culture change in terms of their degree of specialization? what types of animal cells are most similar to the undifferentiated plant cells in a tissue culture? Explain your answer
Plant cells in tissue culture change from undifferentiated mass to specialized cells, similar to animal stem cells.
Explanation:When plant cells are placed in a medium for tissue culture, they undergo changes in terms of their degree of specialization. Initially, the cells form an undifferentiated mass known as callus, which is a mass of cells that have not yet specialized into specific cell types. However, over time, tiny roots, stems, and leaves start to grow from this mass as the cells differentiate and specialize into their respective cell types.
The undifferentiated plant cells in tissue culture are most similar to stem cells in animal tissues. Stem cells, like undifferentiated plant cells, have the ability to differentiate into various cell types and are capable of self-renewal. They are the foundation for growth and repair in animals, just as undifferentiated plant cells contribute to the growth and regeneration of plants.
In tissue culture, specialized plant cells de-differentiate into a less specialized, undifferentiated state known as a callus, similar to stem cells in animals.
Explanation:In tissue culture, the plant cells placed in a medium change from being specialized and differentiated to a state of being undifferentiated or less specialized, forming a mass called callus. This process is akin to the meristematic cells found in plants, which are capable of continuous division and growth. The animal cells most similar to these undifferentiated plant cells are stem cells, particularly embryonic stem cells, which can also divide and differentiate into various cell types. This capacity for de-differentiation and subsequent re-specialization allows both plant tissue cultures and animal stem cells to be used for growth and regeneration of tissues.
In a DNA molecule, which nitrogenous bases are bonded together?
A purines with purines
B pyrimidines with purines
C pyrimidines with pyrimidines
Final answer:
In a DNA molecule, purines are bonded with pyrimidines. Adenine (A) bonds with Thymine (T), and Guanine (G) bonds with Cytosine (C).
Explanation:
In a DNA molecule, purines are bonded with pyrimidines. This means that Adenine (A), a purine, will always bond with Thymine (T), a pyrimidine. Similarly, Guanine (G), another purine, will always bond with Cytosine (C), a pyrimidine. The base pairs (A-T and G-C) are held together by hydrogen bonding, creating the double-stranded helical structure of DNA.
Indicate why the hapmap project is useful in diagnosing human disease
What always affects measurement error in an experiment?
A.investigator bias
B.variability in nature
C.instrument precision
D.misreading the instrument
HOW DEEP IS THE CENTER OF THE EARTH?
How are water erosion and wind erosion similar?
which term identifies the process used by the cell to bring in large molecules
Answer: The correct answer is- Endocytosis.
Endocytosis can be described as a process in which cell engulfs large molecules from the environment by fusing them with its cell membrane (plasma membrane).
Cell membrane is a selectively permeable, hydrophobic membrane. Large polar molecules ( such as proteins and hormones) can not pass through it by means of simple diffusion.
Cell performs endocytosis for taking in such large molecules.
In this process, plasma membrane first forms a pocket around the target molecule ( such as protein) through invagination and once it completely surrounds the molecule, it is pinched off in the cytoplasm in a form of food vacuole ( phagosome in case of solid particles).
Thus, Endocytosis is the right answer.
The biomass pyramids for phytoplankton and trees in their respective environments are _______.
a.
both inverted
b.
the same
c.
opposite
d.
both normal
Answer:
C
Explanation:
edge 2020
Paramecium, shown here, possess ___________ that help counteract the effects of osmosis.
A)
oral grooves
B)
ciliated pellicle
C)
contractile vacuoles
D)
micro and macro nuclei
Specialized cells in plant roots ensure that they grow down into the soil to find water and nutrients. This plant response by specialized cells is called
This plant response by specialized cells is called gravitropism.
Gravitropism is the growth of a plant’s organ in response to gravity. In the root cap of plants, there are specialized cells known as statocytes that contains granules known as statoliths which stimulate the production of auxin; a hormone that is important for controlling plant growth. Plants have the ability to sense gravity with the aid of these specialized cells and plant roots grow downward into the soil while stems grow in the opposite direction.
The white eye gene of Drosophila is recessive and sex-linked. Assume that a white-eyed female is mated to a wild-type male. What would be the phenotypes of the offspring?
What would be the phenotypes of the reciprocal cross?
Give one reason why the relationship between genes and traits is often complex.