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larisa [96]
3 years ago
8

Help real quickAfter reading & the video, in your own words, explain how a muscle contracts​

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

Answer:

Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other. It is generally assumed that this process is driven by cross-bridges which extend from the myosin filaments and cyclically interact with the actin filaments as ATP is hydrolysed.

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The complexity of life has _____ throughout Maryland's 4.6 billion year history.
exis [7]

Answer:

  A.  increased

Explanation:

In general, life has gotten more complex through history. However, there have been times when biodiversity as been substantially reduced. (We may be in one of those times at present.) We cannot say that the complexity of life has increased <em>throughout</em> the history of any particular place, but we can say the long term trend has been one of increase.

8 0
3 years ago
The skeletal muscles are innervated by __________.
11111nata11111 [884]

Answer:

Some kind of neuron

Explanation:

I'm sorry I'm not too sure-  it's some kind of neuron. It may be a motor Neuron? Try looking it up.

7 0
3 years ago
Are low pressure systems are associated with a low or high density
ch4aika [34]
High Density because you are talking about storms and other stuff.
8 0
4 years ago
When an action potential reaches the axon terminal of a neuron, it triggers the release of chemical messengers called?
xeze [42]
These chemical substances released to the synaptic cleft are known as neurotransmitters
example
dopamine
3 0
3 years ago
1. What function do photoreceptor cells perform?
Eddi Din [679]

Answer:

The correct answer is 3 They detect light,allowing the spiders to see colors.

Explanation:

Photoreceptors are also called transducin  presnt in the rod cells of retina and play an important role in vision.

     The phoreceptor is a G protein coupled receptor that contain GDP.When light strikes the eye the GDP is coverted to GTP resulting in the activation of the photo receptors.

 The activation of photo receptors result in the closure of Na+ ion channels leading to hyperpolarization caused by lowering the cellular label of cGMP by the activation of phosphodiesterase enzyme.

  This ultimately result in the formation of 5"GMP.

5 0
3 years ago
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