1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mr_godi [17]
3 years ago
6

Question 2 (Multiple Choice Worth 2 points)

Biology
1 answer:
kolezko [41]3 years ago
6 0

Explanation:

The atmosphere is the gaseous envelope round the earth.

The biosphere is the part of the earth dominated and occupied by living organisms.

As with other spheres of the earth, the biosphere and atmosphere are constantly interacting too.

  • Organisms breathe in air to their respiration processes.
  • Weather elements are conditioned by the atmosphere.
  • Decomposition of organisms release gases back into the atmosphere.

learn more:

Biogeochemical cycle brainly.com/question/4217448

#learnwithBrainly

You might be interested in
H20 and O2 are examples of.<br> Atoms, molecules, droplets <br> Or water
shutvik [7]

Answer:

molecules because an water would just be H20, an atom would just be oxygen or hydrogen on its own, and droplets also refer to just liquid which oxygen is not

5 0
3 years ago
Infer how the structure of the root would be impacted in the absence of each of these
Helga [31]

Answer:

I  cant see them

Explanation:

Please Provide a picture.

8 0
3 years ago
Compare the manner in which grasshopper hears to the way a human hears
Arturiano [62]
Grasshoppers have no ears, instead they use an organ called the tympanum located in the first segment of their abdomen, whereas humans take in sound waves through the ear canal until they reach the eardrum. The eardrum picks up the vibrations and then transmits them to tiny bones in the middle of the ear, the bones pass the vibrations to the inner ear (which is filled with liquid) and the cochlea.

Hope I could help.
8 0
3 years ago
Which type of volcano does not form a mountain
algol13
A fissure volcano does not form a mountain 
7 0
3 years ago
Read 2 more answers
Please describe the signal transmission across a myoneural junction that allows the nervous system to move the muscles of a foot
Tems11 [23]

The contraction of the muscles (whether at the level of the arms or the legs) and more specifically the muscular fibers of the musculoskeletal system, that is to say organs, in the broad sense of the term, allowing the movement, is normally under the total dependence of the nerves which transmit a nervous command.

This command can be considered as a voluntary order (from the cerebral cortex). This nerve impulse then takes the direction of the spinal cord where it is directed by a series of nerves called relays to route the nerve impulse (order) to the muscles.

Then the nerve impulse propagates along the axon and when it reaches the motor plate it causes the release of a substance called neurotransmitter: acetylcholine. The neuroreceptor, in the motor plate, receives the nerve signal that the end of the axon transmits to it by a chemical mediator. Acetylcholine binds to the receptors, triggering a contraction of the muscle cell.

<em>More precisely, acetylcholine is enclosed in vesicles (a kind of tiny sphere-shaped grains) located within the nervous corpuscles located at the end of each neuron. When nerve impulses (stimulation) reach the presynaptic membrane, acetylcholine is released and diffuses into the synaptic cleft (about 50 nanometers wide) filling it. Acetylcholine will at this time bind very briefly to receptors located after the synapse (postsynaptic) and trigger the opening of sodium channels (followed by their closure and an opening of potassium channels). These channels are tiny tubules allowing the passage of ions (atom having lost or gained an electron). </em>

<em>This results in the propagation of an "electric charge" action potential at the origin of the passage of the nerve impulse, in other words of the order given by the brain or by the autonomic nervous system. </em>

<em> </em>

After this first step acetylcholine is then released and degraded by an enzyme called acetylcholinesterase (AChE) located in the synaptic cleft but also on the postsynaptic membrane. The choline thus released is then recaptured by the presynaptic bodies and reused for the synthesis of new acetylcholine molecules.

Acetylcholine is involved in the control of muscles via neuromuscular terminations and viscera or glands and sometimes both. This is how it intervenes to make also work for certain organs like the heart, the salivary glands, the sweat glands, the bladder, the bronchi, the eyes, intestine etc.

<em>A variety of enzymes called cholinesterases allow the rapid inactivation of acetylcholine. The chemical reaction that causes the contraction of the muscle fiber is a brief phenomenon. Indeed, acetylcholine is very rapidly degraded by cholinesterases. As a result, acetylcholine itself cannot be used in drug form. Nevertheless to circumvent these difficulties other drugs reproduce or prevent the effects of this neuromodulator. These are agonists or antagonists respectively. </em>

The muscular fiber is an elongated cell used in the composition of the muscle, which is a fleshy organ with the property of contracting and relaxing. Each muscle cell is surrounded by a membrane containing a cytoplasm called sarcoplasm with myofibrils which are elongate filaments parallel to the major axis of the cell.

5 0
3 years ago
Other questions:
  • The sparsely settled tropical grasslands of southern venezuela and eastern colombia are called
    13·1 answer
  • The phospholipid molecule has two parts, the polar end and the bipolar end.
    12·1 answer
  • Which protist exhibits both animal like and plant like characteristics
    12·2 answers
  • Explain how phosphorus runoff into oceans and lakes from farming has a negative impact on the ecosystem.
    8·1 answer
  • The total environment of plants, animals, and the physical characteristics in which they live are called ____________ . Grouping
    14·1 answer
  • The reaction rate of a chemical reaction was measured with and without an enzyme. Which line is the reaction with an enzyme?
    8·2 answers
  • Which describes the correct pairing of DNA bases?
    8·2 answers
  • ______rock is created form the cooling and crystallization of magma (or lava) into a solid​
    11·1 answer
  • PLEASE HELP ME THIS IS DUE BY 11:59 PM
    12·1 answer
  • What is photosynthesis?<br>​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!