Answers
Answer:
Physical Layers:
- Crust
- Mantle
Compositional Layers:
- Asthenosphere
- Mesosphere
Explanation:
Physical Layers refer to the layers of the Earth based on their physical properties such as their state (solid or semi-solid) and how they behave. The two primary physical layers are the Crust and Mantle.
- Crust: The Earth's Crust is the outermost layer, which includes the solid ground we walk on. It is relatively thin compared to the other layers and is where we find the continents and ocean floors.
- Mantle: The Mantle lies beneath the crust and is semi-solid, extending to a depth of about 2,900 kilometers (1,800 miles). It's responsible for the convective movement of the Earth's tectonic plates.
Compositional Layers, on the other hand, are based on the chemical composition of the Earth's interior. They include:
- Asthenosphere: The Asthenosphere is part of the upper mantle and is composed of partially molten rock. It's semi-fluid, allowing for the movement of tectonic plates. This is crucial for plate tectonics and the Earth's surface dynamics.
- Mesosphere: The Mesosphere is not typically considered a distinct compositional layer in the Earth, but rather part of the lower mantle. It consists of solid rock that behaves plastically, allowing for convection currents to occur deep within the Earth.
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Explain why hormones are able to travel through the body but only affect certain cells.
b. dendrite
c. sensory
d. motor
Answers
Answer: d. motor
Explanation: Efferent neurons are motor neurons. They are called efferent neurons because they transport nerve impulses out of the central nervous system (CNS) to effectors such as muscles or glands.
Answers
Climate change is the increasing changes in the measures of climate over a long period of time.
This includes : precipitation, temperature, and wind patterns.
Hopes this helps :)
Answer:
global warming is a part of climate change
Explanation:
climate change refers to the way that climate is changing on earth this can be global warming or also cooling
b. X
c. Y
d. Z
e. A realistic substrate is not shown in the diagram.
Answers
Answer:
b.X is most likely to be the substrate
B. 100 grams
C. 130 grams
D. 160 grams
Answers
Answer:
correct option is C. 130 grams
Explanation:
solution
as carbohydrate is a macro nutrient that is found in many foods and beverage
Most of carbohydrate occur in plant base food
some main natural source of carbohydrate are
- vegetable
- fruit
- nuts
- milk
- grain
- seeds
and for adult age of 19 years to 30 years carbohydrate need is 130 grams per day
and adult male age of 19 years to 30 years fiber need is 38 grams per day
and adult female age of 19 years to 30 years fiber need is 25 grams per day
so correct option is C. 130 grams
Answers
Answer:
cell walls and chloroplasts
b. Release of Ca2+ from the sarcoplasmic reticulum through channels is slow compared to the uptake of Ca2+ into the SR via ATP-dependent pumps, resulting in Ca2+ slowly trickling into the sarcomeres between closely spaced action potentials.
c. When a series of action potentials is closely spaced, there is not sufficient time for Ca2+ uptake into the sarcoplasmic reticulum between action potentials, and Ca2+ remains bound to troponin throughout the series.
d. Fewer Ca2+ ions are released from the sarcoplasmic reticulum as a result of several closely spaced action potentials than as a result of a single action potential.
Answers
Answer:
The correct answer is - option C.
Explanation:
A series of closely spaced action potentials cause the sustained muscle to contract which is only possible if in the sarcomere of muscles the has high Ca2+ during the complete contraction cycle.
If the Ca2+ level is lower due to the sufficient Ca2+ were taken up into the sarcoplasmic reticulum in the sarcomere below the range between each action potential, the muscle would relax because the myosin-binding sites will be covered by tropomyosin.
The Ca2+ channels in the SR are able to move the ions more rapidly than the Ca2+ pumps can move in SR so this will cause the concentration of calcium to always high which leads to the binding of tropomyosin and therefore, the myosin-binding sites would be exposed until the contraction is achieved.