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yulyashka [42]
3 years ago
12

Distinguish among producers, primary consumers,

Biology
1 answer:
pickupchik [31]3 years ago
5 0

This is the topic of food webs energy distributions. It

starts with producers(grass, shrubs, etc.), Primary consumers(herbivores), secondary consumers (carnivorous), tertiary consumers(consume primarily secondary consumers), decomposers(fungus that eat carcus' after death). There is a certain amount energy that the producers will start with on the base trophic level and it passes on the energy( and even the diseases) going up the pyramid.

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True at least most do
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This article discusses a group of scientists who are studying an ecosystem. What ecosystem are the scientists studying?
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View the animation below, then complete the quiz to test your knowledge of the concept. conducting of the heart
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1. In the heart, an action potential originates in the (E) sinoatrial node.
The cardiac action potential is a term referring to the change in the membrane potential of heart cells causing the heart to contract. Cardiac action potentials are created by a group of specialized cells capable of generating automatic action potentials and are located in the right atrium of the heart. These cells are called sinoatrial node and sometimes are referred to as the natural pacemaker of the heart. This characterization originates from the fact that sinoatrial node continuously provides action potential and sets the rhythm of the heart function.

2. The sequence of travel by an action potential through the heart is (A) sinoatrial node, atrioventricular node, atrioventricular bundle, bundle branches, Purkinje fibers.
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3. The correct answer is A.
The generation of an action potential in the sinoatrial node causes the contraction of the atria. When the action potential passes from the sinoatrial node to the atrioventricular node, it slows down. This causes the transport of the electrical impulse from the atria to the ventricles to slow down. This delay enables the blood (from the contraction of the atria) to fill the ventricles before their contraction. 

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The interventricular septum is a structure which divides the two ventricles of the heart and it is composed of two branches, the left bundle and the right bundle branch. When the action potential reaches the interventricular septum, it then travels to the apex of the heart from where it travels upwards along the walls of the ventricles and the ventricular contraction begins.

5. This statement is true.  
The bundle branches gradually become Purkinje fibers located in the interior of the ventricular walls. Purkinje fibers are specialized cells and are responsible for conducting cardiac action potentials from the bundle branches to the ventricular walls. This signal transduction causes the muscle of the ventricular walls to contract. 
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Within a limited area, if the population of a predator increases, the population of its prey is likely to
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The prey is likely to decrease/decline if the predator's population increases

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