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Natali [406]
1 year ago
9

When viewed under a transmission electron microscope, the golgi apparatus looks like ______.

Biology
1 answer:
KATRIN_1 [288]1 year ago
8 0

Answer:

a stack containing multiple flattened, disk-shaped membranes called cisterns

Explanation:

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1. on the trace above
ser-zykov [4K]

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1. when there is cardiovascular disease.

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3. The mitral valve opens.

Explanation:

1. High blood pressure is a common condition in which the force exerted by blood against the walls of the arteries over the course of time is high enough to cause you health problems such as heart disease. After the first rise of pressure caused cardiac ejection volume, one notch occurs with a second ascent product of the reflection of the pulse wave. In younger individuals, with elastic arteries, said wave occurs in diastole, so does not influence the peak systolic pressure. By contrast, with advancing age and the stiffness of large vessels, the reflected wave is transmitted prior to the aorta (systole) so as to increase the peak central PAS.

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3. When the pressure in the left ventricle falls below the pressure of the left atrium, the mitral valve opens, and the left ventricle fills with blood that had been accumulating in the left atrium.

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3 years ago
How are directional selection and disruptive selection similar? how are they different?
Irina18 [472]
The similarity between directional and disruptive is that both are types of selection on polygenic traits in which the curve shift away from the middle. 

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Rank the sequence of events at the NMJ that initiate an action potential in the muscle fiber, from first to last.
wlad13 [49]

The correct order is:

- Action potential arrives at the axon terminal.

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- Acetylcholine is released into the synaptic cleft.

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- Junctional folds become depolarized.

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Action potential travels through the membrane of the presynaptic cell causing the channels permeable to calcium ions to open. Ca2+ flow through the presynaptic membrane and increase the Ca concentration in the cell which will activate proteins attached to vesicles that contain a neurotransmitter (e.g. acetylcholine). Vesicles fuse with the membrane of the presynaptic cell, thereby release their contents into the synaptic cleft-space between the membranes of the pre- and postsynaptic cells. Neurotransmitter binds to its receptors on the postsynaptic membrane and its binding causes depolarization of the target cell (muscle cell).

4 0
3 years ago
Conor and contrast rill erosion and gully erosion
Andru [333]

Answer:

Explanation:

Rill erosion is caused by slow movement of water along small channels on bare land with less vegetative cover. Gully erosion creates a deep channels that the surface runoff is further enhanced. The water movement is faster, creating a deeper channels.Apr 16, 2015

8 0
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