What is the main function of the immune (lymphatic) system?
A. Keeping a body healthy from disease
B. absorbing oxygen
Answer:
A. Keeping a body healthy from diseaseAnswer:
A. Keeping a body healthy from disease
Explanation:
The immune system is made up of special organs, cells and chemicals that fight infection (microbes).
Hope this helps!
Which of the following is not an example of a unique adaptation that suits an organism to a particular environment?
Answer:
Could you possibly provide the list in which I can choose from to state the answer?
Which of the following is the best description of an element?
1. A substance that cannot be broken down into simpler substances
2. A naturally occurring mineral made of more than one substances
3. A small particle made with a specific chemical composition
4. A collection of atoms that have different abilities when joined together
Answer:
I think 1
Explanation:
you can't break an element into different elements
The cereal you ate for breakfast was most like grown in a_____.
desert
grassland
tropical rainforest
ANY FOUR DICOT SEED?
Answer:
bitter gourd seeds
castor seeds
Mango seeds
Night jasmime seeds
answer all 3 please
Answer: 1. Earthquake
2. Lava
3. Divergent Boundary
Explanation:
The ecological role of fungi is that of:
O producers
O predators
O grazers
O decomposers
Answer:
decomposers si the light answer
Using homologous structures and any other information (from notes, activities, etc),
explain your opinion on the THEORY OF EVOLUTION in 8 sentences. Be sure to cite
evidence (supporting details) for your ideas (EVALUATION RI 8.8).
evolution is fundamentally unpredictable.the theory of evolution as it is used here refers to "macroevolution'a theory is meant to both explain and predict;the theory of evolution only explains .the theory of evolution is not a theory and it is suggested calling it a working hypothesis:the working hypothesis of evolution
Which neurotransmitters are used for each division of the autonomic nervous system? Be sure to describe the synapse at the autonomic ganglion and at the effector. What component of the system determines if a given neurotransmitter has an excitatory or inhibitory effect on the target effector?
Answer:
The autonomic nervous system is in charge of controlling visceral effectors. Traditionally, it is described by its peripheral nervous components (ganglia, nerves and plexuses) and two divisions are distinguished: the sympathetic and the parasympathetic. Transmission of the excitatory stimulus through the synaptic cleft occurs by release of neurotransmitters; the neurotransmitters of the sympathetic and parasympathetic nervous system are mainly norepinephrine (NA) and acetylcholine (AC). The NA-secreting fibers are called adrenergic and those that secrete AC, cholinergic. All preganglionic neurons, both those of the sympathetic nervous system and those of the parasympathetic nervous system, are cholinergic. The neuron that releases the neurotransmitter is called a presynaptic neuron. The signal receptor neuron is called a postsynaptic neuron. Depending on the type of neurotransmitter released, postsynaptic neurons are either stimulated (excited) or de-stimulated (inhibited).
Explanation:
The autonomic nervous system is the part of the central and peripheral nervous system that is responsible for the regulation of the involuntary functions of the organism, the maintenance of internal homeostasis and the adaptive responses to variations in the external and internal environment and two divisions are distinguished: the sympathetic and the parasympathetic. Acetylcholine is the preganglionic neurotransmitter of both divisions of the S.N.A. (sympathetic and parasympathetic) and also of the postganglionic neurons of the parasympathetic. The nerves at whose endings acetylcholine are released are called cholinergic. Norepinephrine is the neurotransmitter of postganglionic sympathetic neurons. The nerves into which norepinephrine is released are called adrenergic. Within the efferent sympathetic impulses, the postganglionic neurons that innervate the eccrine sweat glands and some blood vessels that supply the skeletal muscles are of the cholinergic type. Both acetylcholine and norepinephrine act on the different organs to produce the corresponding parasympathetic or sympathetic effects. The peripheral nerve endings of the sympathetic form a reticulum or plexus from which the terminal fibers come in contact with the effector cells. All the norepinephrine in peripheral tissues is found in the sympathetic endings in which it accumulates in subcellular particles analogous to the chromaffin granulations of the adrenal medulla. The release of norepinephrine at nerve endings occurs in response to action potentials that travel through nerve endings. The receptor, when stimulated by catecholamines, sets in motion a series of membrane changes that are followed by a cascade of intracellular phenomena that culminate in a measurable response. There are two classes of adrenergic receptors known as alpha and beta. These two classes are again subdivided into others that have different functions and that can be stimulated or blocked separately. Norepinephrine primarily excites alpha receptors and beta receptors to a small extent. The neurotransmitter acetylcholine is synthesized at the axonal terminal and deposited in synaptic vesicles. Acetylcholine activates two different types of receptors, called muscarinic and nicotinic receptors. Acetylcholine (AC) synthesis takes place at presynaptic termination by acetylation of choline with acetyl-coenzyme A, a reaction catalyzed by acetylcholinetransferase. The energy required for the release of a neurotransmitter is generated in the mitochondria of the presynaptic terminal. Binding of neurotransmitters to postsynaptic membrane receptors produces changes in membrane permeability. The nature of the neurotransmitter and the receptor molecule determines whether the effect produced will be one of excitation or inhibition of the postsynaptic neuron.
A climber falls down on a rope causing his body to lift up words and rise up along the rope is that newtons first law second law or third law
The immune response consists of different components playing their role for a common goal: to rid the body of a pathogen. Create an analogy that helps explain the roles of the responses of the immune system and describe the relationship between the responses.
Answer:
In a primary immune response, naive B cells are stimulated by antigen, become activated, and differentiate into antibody-secreting cells that produce antibodies specific for the eliciting antigen.
A secondary immune response is elicited when the same antigen stimulates memory B cells, leading to the production of greater quantities of specific antibodies that are produced in the primary response
Answer:
In a primary immune response, naïve B cells are stimulated by antigen, become activated, and differentiate into antibody-secreting cells that produce antibodies specific for the eliciting antigen.
A secondary immune response is elicited when the same antigen stimulates memory B cells, leading to the production of greater quantities of specific antibodies that are produced in the primary response.
__________ is a single-stranded molecule made of nucleotides of bases uracil, adenine, guanine, and cytosine
1. Which statement regarding these
methods of reproduction is correct?
(1) They are both forms of asexual
reproduction.
(2) They are both forms of sexual
reproduction.
(3) Method A is a form of asexual
reproduction and method B is a form of
sexual reproduction.
(4) Method A is a form of sexual
reproduction and method B is a form of
asexual reproduction.
Do you have a like text book for this for me to answer?
Which if the following are more closely related? Why?
A- Frog and Ant
B- Salmon and Frog **
C- Bear and Ostrich.
Plants growing high up on mountains tend to be much smaller than those growing at sea level. This is because the rate of photosynthesis for plants on the mountain is slower. Which factor is at a lower level in the mountain environment, causing a limit to the rate of photosynthesis?
Answer:
CO2
Explanation:
Which of the following describes a mutual relationship?
A pack of hyenas hunt together so they can attack larger animals.
Ants drink nectar from an acacia tree and protect the tree from harmful insects.
A flock of seagulls fly together to reduce the amount of air resistance they feel.
A grasshopper and a rabbit eat different types of plants to avoid competition.
Answer:
Your answer would be A: A pack of hyenas hunt together so they can attack larger animals.
Which of these is an example of soil contamination?
a. A recycling bin
b. An eroded hillside
c. Industrial waste
d. A clear-cut forest
Answer:
industrial waste
Explanation:
1. List some things that happen to your body when you are really cold or really hot.
2. From your list, think of 3 body systems that work to regulate your body temperature and keep it around 98.6 degrees Fahrenheit .
Answer:
1 . when the body gets really cold . the muscles will generate heat through shivering then the blood vessels that will transfer warm blood from the organs to the cold skin ....
when the body gets hot ... your heart begins to pump faster that way it's bringing the blood closer to the serface of the skin
Explanation:
some body systems that work to regulate body temperature is
. cardiovascular
. muscular
. and the blood vessels as well
hope this helps !!!!
WILL MARK BRAINLIEST PLS HELP
Many biotic factors affect individuals in a population. Which of the following is an example of an organism being directly affected by a biotic factor?
A plant is located in a room with no light source.
A chipmunk hibernates when the temperature gets colder.
A maple tree growing on a hillside washed away in a flood.
A squirrel has water and a nest but cannot find a mate
Answer:
A plant is located in a room with no light source
Answer:
The maple tree would most likely the answer
Explanation:
This is because its shaping its environment
Chloroplasts have two regions.
and stroma.
Answer:
grana and stroma
Explanation:
The cacti in this environment survive by spreading out and growing apart from one another. Why do the cacti grow this way?
Answer:
b b b b b b b b
Explanation:
Answer:
B
Explanation:
What are the products of photosynthesis? (5 Points glucose and oxygen glucose and carbon dioxide carbon dioxide and ATP
Answer:
Glucose and Oxygen
Explanation:
plssssssssssssssssssssssssssssssssssssssssss help
Answer:
1st question= physical weathering
2nd question= deposition
Explanation:
hope it helps
PLEASE HELP!! During what phase does the spindle fibers break down!!!
Answer:
During Telophase.
Explanation:
Come up with five ethical guidelines for research. Write statements that reflect your own views of
what is right and wrong. If you really love animals, an example of one guideline might be "No
animals may be used in research of any kind." However, when coming up with these guidelines, be
thoughtful about what they really mean. Think of the information you read about earlier. Try to
phrase your guidelines in a way that would allow research that you think would be beneficial to
still be done. You may find that certain circumstances may cause you to rethink your own ethics!
Answer:
No
Explanation:
Help please!! I don’t understand this.
Answer:
1. California Sea Lion and Galapagos Sea Lion are closely related because they have the same genus Zalophus.
2. Escherichia is a Genus.
3. Fungi
please help..........
Are dinosaur fossil bones often found in the order they appeared on the animal? Explain.
Answer:
no
Explanation:.............
Which molecules are inputs in photosynthesis?
Answer:
Explanation:
In photosynthesis, water, carbon dioxide
Which is the best prediction of what might happen if the organism at the center of a food web completely disappeared and the animals that depended on it were not able to find an alternative food source?
Answer:
The animals who eat that organism would die, since their food source has gone away, the animals would even go extinct from starvation
Explanation: