Answer:
3. Cardiac muscle cells - are used to help the heart beat and pump blood.
2. Smooth muscle cells- are used in the digestion of food.
1. Skeletal muscle cells- are involved in movements of the skeleton (bones).
Explanation:
There are three types of muscle cells - skeletal, cardiac and smooth.
The skeletal muscle cells are the ones that form the muscle and help to contract and relax. The muscles for movement to take place. these are voluntary muscles and appears striated when viewed under a microscope.
The cardiac muscles are the ones that are found in the heart and are involved in the contraction of the heart for pumping the blood and making the heartbeat. These are involuntary muscles and appear striated under the microscope.
The smooth muscles are the ones that are used to control the involuntary movements in the body except for the heart. Since digestion involves involuntary muscles these are located in the walls of the digestive organs such as stomach and intestine. These muscle cells are non-striated.
Hope this helps
Answer: Smooth Muscles, Cardiac Muscle, and Cardiac muscle.
Explanation:
Smooth Muscles
Visceral muscle is found inside organs like the stomach, intestines, and blood vessels. Visceral muscles are the weakest of all the muscles. Their main function is to move substances through the organ. This type of muscle is also called plain, unstriped, non-striated, visceral, or involuntary muscles. Visceral muscles are also called involuntary muscles as they are controlled by the part of the brain which cannot be directly controlled by the conscious mind. Smooth muscles do not exhibit cross-striations under a microscope, being plain and smooth in form and their uniform appearance, when viewed under a microscope, has led to the term smooth muscle. The smooth muscle fiber is an elongated, spindle-shaped cell, with a single nucleus placed centrally; the myofibrils show longitudinal striations. They are supplied by autonomic nerves and are capable of sustained contraction, and, therefore, do not fatigue easily. They provide motor power for regulating the internal environment related to digestion, circulation, secretion, and excretion. These are less dependent on nervous control, being capable of contracting automatically, spontaneously, and often rhythmically. Muscles of the blood vessels, and the arrector pili or erector pili muscles of the skin are examples of smooth muscles.
Cardiac Muscle
This type of muscle, as the name suggests is found in the heart. It is intermediate in structure, being striated and at the same time involuntary. It is meant for automatic and rhythmic-contractions. These fibers have a single nucleus placed centrally which branches and anastomoses with the neighboring fibers at intercalated discs (apposed cell membranes). The cross-striations are less prominent than those in the skeletal muscle. It is responsible for pumping blood. It is unique as it stimulates itself to contract [autorhythmic or intrinsically controlled] by a pacemaker which is also made of cardiac muscle tissue. The cells of cardiac muscle tissue are striated—that is, they appear to have light and dark stripes when viewed under a light microscope. The arrangement of protein fibers inside the cells causes these light and dark bands. Striations indicate that a muscle cell is very strong, unlike visceral muscles. The cells of cardiac muscle are branched X or Y-shaped cells tightly connected by finger-like projections from two neighboring cells [called intercalated discs] that interlock and provide a strong bond between the cells. The branched structure and intercalated discs allow the cells to resist high blood pressures and the strain of continuous working. These features also help to spread electrochemical signals quickly from cell to cell so that the heart can beat as a unit.
Skeletal Muscles
Skeletal muscles are types of muscles that are most abundant and are found attached to the skeleton. They are also called striped, striated, somatic, or voluntary muscles. They exhibit cross-striations under the microscope and are considered to be the best-differentiated form of muscle. They are supplied by somatic (cerebrospinal) nerves, and, therefore, are under voluntary control, with certain exceptions. They respond quickly to stimuli, being capable of rapid contractions, and help in adjusting the individual to an external environment. They also get fatigued very easily. Each muscle fiber of skeletal muscle is a multinucleated cylindrical cell, containing groups of myofibrils. Myofibrils are made up of myofilaments of three types (myosin, actin, and tropomyosin). These are the actual contractile elements of the muscle. These are under the highest nervous control of the cerebral cortex. Examples of these types of muscles are muscles of limbs and body wall, and bronchial muscles are examples of skeletal muscles.
PLEASE HELP EMERGENCY!! IF YOU ARE NOT 100% SURE ABOUT YOUR ANSWER DO NOT ANSWER THEN!! PLEASE!!
Every cell in the human body must do ___________ in order to survive.
Cellular Respiration
Photosynthesis
Both
(This is 7th grade science)
Answer:
cellular respiration
Explanation:
100% sure photosynthesis is for plants
please help
difference between stimulus and stimuli.
Answer:
A stimulus is anything that can trigger a physical or behavioral change. The plural of stimulus is stimuli. Stimuli can be internal or external.
Weathering and erosion contribute to the creation of landforms that contain nutrient-rich soil for plant growth. Put the following processes used to create nutrient-rich soil in the correct order.
1
multiple cracks cause large rock to break into smaller rocks
2
water infiltrates existing cracks in large rocks
3
small rocks experience abrasion from winds that contain sand particles
4
sediment combines with organic material
5
rocks expand when exposed to Earth's surface and pressure decreases
What order please??
Answer:
-5
-3
-1
-4
-2
Explanation:
plzzzzz help quickkkkkk
Answer:
i would say B
Explanation:
Weather and climate fill in the blank
Answer:
wheres the sentence so I can fill in the blank
Explanation:
Describe the growth of a population that in a given year has 10 births, 8 deaths, and no migration
What is an adaptation? What happens if the adaptation has a positive affect?
Answer:
Adaptation, in biology, the process by which a species becomes fitted to its environment; it is the result of natural selection's acting upon heritable variation over several generations.
Explanation:
Match the labeled parts of the cell to their functions. Gives the cell its shape Stores water, waste, and food Converts energy from the sun to chemical energy Packages and distributes proteins
please hurry!!
Answer:
gives cell shape - d
distributes proteins- c
converts energy - b
stores water, waste, and food - a
Explanation:
Match the labeled parts of the cell to their functions.
Gives the cell its shape:
✔ D
Stores water, waste, and food:
✔ A
Converts energy from the sun to chemical energy:
✔ B
Packages and distributes proteins:
✔ C
Please help me on this
Answer:
vacuole -> stores water, waste and food
ribosome -> produces proteins
chloroplast -> converts energy
lysosome -> breaks down
cell membrane -> seperates
Explanation:
When plates slide past each other, their jagged edges get stuck. Then, plates release in a sudden jolt. What is that called?
Group of answer choices
Earthquake
Convergence
Tectonics
Volcano
Two of the main functions of the atmosphere is to sustain life: *
Select 2
It blocks ultraviolet radiation
It blocks moonlight
It blocks small meteorites
Reflects all the sunlight
Answer:
the answer is A and C
Explanation:
Answer:
The answer to your problem would be to choose the first answer, & the last answer.
Explanation:
the atmosphere blocks out most of the sunlight, & blocks off almost all of the U.V. radiation.
Your welcome.
Best of luck to ya in your school,
James Lester.
Match each description of the types of mechanical weathering to the correct term.
1.rocks tumble and collide with one another in a flowing stream1
2.water gets into cracks of rocks and expands as it freezes
3.the release of pressure causes sheets of rock to peel away
a.
exfoliation
b.
ice wedging
c.
abrasion
Answer:
a #3
b#2
c#1
....................
I need help with my biology hm
PLZ HELP IT IS DUE TODAY
the diagram below shows a Chesapeake Bay Waterbird Food Web. What might happen if the sea duck population suddenly shrunk due to disease?
Answer:
Anything that eats the sea duck would also catch the disease and then it would pass on a create a pandemic and can you put me as brainiest.
Explanation:
A biome that is temperate is likely to have temperatures that are:
a.
extremely cold.
b
extremely warm.
c
moderate- not too hot or too cold.
Answer:
extremely cold
Explanation:
Which of the following is an example of work being done on an object?
A.
Water in a pot changes into steam.
B.
A man pushes a couch across the room.
C.
A box rests on the floor.
D.
A prism scatters ultraviolet light into visible light.
Is a Apple an organ,Explain.
Answer:
A apple is not an organ but it is a product from a apple tree. The apple tree produces the apple from its reproduction system, which shows that a apple could not be an organ.
A student takes notes in class as shown below.
A.
Uses an objective process
Is updated constantly
B.
Is not objective
Does not use a process
Resists new information
Which are the best titles for A and B?
A: “Science”; B: “Pseudoscience”
A: “Pseudoscience”; B: “Science”
A: “Characteristics of Science”; B: “Limitations of Science”
A: “Limitations of Science”; B: “Characteristics of Science”
Answer:
it is the 3rd one
Explanation:
please help I will brainiest!!!!
Answer:
field 1 is bigger field is smaller 2 question field 2 biodiveristy
Explanation:
PLEASE HELP EMERGENCY!! IF YOU ARE NOT 100% SURE ABOUT YOUR ANSWER DO NOT ANSWER THEN!! PLEASE!!
Order the levels of organization in the human body from smallest to largest.
organism --> organ system --> organ --> tissue --> cell
cell --> tissue --> organism --> organ system --> organ
cell --> tissue --> organ --> organ system --> organism
(This is 7th grade science)
Answer:
cell, tissue, organ, organ system, organism
Explanation:
Alright! This will be a snap! All living and non-living things are made of one or more unique substances called elements, the smallest unit of which is the atom, (for example, the element oxygen (O) is made of O atoms, carbon (C) is made of C atoms and hydrogen (H) is made of H atoms. Atoms combine to form molecules. Molecules can be small (for example, O2, oxygen gas, which has 2 atoms of the element O; CO2, carbon dioxide, which has 1 atom of C and 2 of O), medium (for example, C6H12O6, glucose, which has 6 atoms of C, 12 of H, and 6 of O); or large (for example molecules called proteins are made of hundreds of atoms of C, H, and O with other elements such as nitrogen (N). Molecules are the building blocks to all structures in the human body.
All living structures are made of cells, which are made of many different molecules. Cells are the smallest independent living thing in the human body. The body is made of many different cell types, each with a particular function, (for example muscle cells contract to move something, and red blood cells carry oxygen). All human cells are made of a cell membrane (thin outer layer) that encloses a jelly-like cellular fluid containing tiny organ-like
structures called organelles. There are many types of organelles, each with a particular function (for example, organelles called mitochondrion provides energy to a cell). Different types of cells contain different amounts and types of organelles, depending on their function, (for example muscle cells use a lot of energy and therefore have many mitochondria while skin cells do not and have few mitochondria).
As in other multicellular organisms, cells in the human body are organized into tissues. A tissue is a group of similar cells that work together to perform a specific function. There are four main tissue types in humans (muscular, epithelial, nervous and connective). An organ is an identifiable structure of the body composed of two or more tissues types (for example, the stomach contains muscular tissue made of muscle cells, which allows it to change its shape, epithelial tissue which lines both the inner and outer surface of the
stomach, nervous tissue which sends and receives signals to and from the stomach and the central nervous system, and connective tissue which binds everything together). Organs often perform a specific physiological function (for example, the stomach helps digest food). An organ system is a group of organs that work together to perform a specific function (for example, the stomach, small and large intestines are all organs of the digestive system, that work together to digest foodstuff, move nutrients into the blood and get rid of waste). The most complex level of organization, the human organism is composed of many organ systems that work together to perform the functions of an
independent individual.
SUPER HAPPY TO HELP!!!!! :) (P.s. can you please give me brainliest?)
The picture below shows a protist undergoing cell division.
As the parent cell divides, it will —
A. pass on genetic information to its offspring through heredity.
B. teach its offspring to look and act like it.
C. form offspring that learn to look like the parent through factors in the environment.
D. hold onto some genetic material so that its offspring only get some of its traits.
In what way is petroleum, a fossil fuel, distributed on Earth?
(Is it evenly,with most places having very little,
unevenly,with some places having none
evenly, with most places having a lot
unevenly, but with all places having at least some)
Petroleum now let's see...Petroleum also used for cars and other vehicles is distributed around the world for different uses. Today, fossils fuels are necessary for human survival and everyday life and are the primary source for the world’s energy. They are used for heating, transportation, generating electricity, and creating common products like computers, cosmetics, paint, and household appliances.
please help me with my science homework! ill mark brainliest to whoever gives me a good answer first :D (look at the picture below)
Answer:
Conduction
Explanation:
Because "Conduction" means feeling warmth or heat
How is the fossil record evidence for evolution and how have organisms changed overtime?
Answer:
Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today paleontologists can determine the age of fossils using methods like radiometric dating and categorize them to determine the evolutionary relationships between organisms.
Explanation:
Explain how Punnett squares are used to describe the
genetic relationship between parent to offspring.
Answer:
It shows how much traits are aquirer from child to kid.
Answer:
its the real one no mistake
Explanation:
Which statement best describes an immune response? *
A) It always produces antibodies
B) It usually involves recognition and destruction of pathogens
C) It stimulates asexual reproduction and resistance in pathogens
D) It releases red blood cells that destroy pathogens
Based on the nature of the immune response, the statement that best describes an immune response is, It usually involves recognition and destruction of pathogens; option B.
What is an immune response?
An immune response is a response produced by the body's immune system in response to a foreign body or pathogen.
Features of an immune response include;
It usually involves recognition and destruction of pathogensIt may or may not involve antibodiesTherefore, the statement that best describes an immune response is, It usually involves recognition and destruction of pathogens; option B.
Learn more about immune response at: https://brainly.com/question/15975169
A colorblind male marries a normal female. Their daughter is colorblind. What are the genotypes of both parents?
Answer:
Mans name was GeorgeNotFound
Explanation:
Answer:
Male is homo-zygous recessive and female is hetero-zygous
Help please!!
Number 39!
Answer: cell —> tissue —> organ —> organ system
aka. D
Perform the following Cross in a Punnett Square. Then give the Percentage of offspring that will have the DOMINANT phenotype. "Two plants that are heterozygous for red color are crossed." *
Answer:
hii
Explanation:
D Match the labeled parts of the cell to their functions. Packages and transports materials out of the cell: Breaks down sugar to supply energy for the cell: Breaks down waste and other materials: Helps produce, process, and transport proteins: С
Answer: a c b d
Explanation:
hope that helps
Answer:
A C D B
Explanation:
edg 2021