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Sedbober [7]
3 years ago
14

The circulatory system supports the skeletal muscular system by:

Biology
2 answers:
kompoz [17]3 years ago
8 0
The answer would be C, <span>transporting glucose to the cells where it is broken down and energy is released.

HOPE THIS HELPS! ^_^</span>
ipn [44]3 years ago
5 0
C) transporting glucose to the cells where it is broken down and energy is released.

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Describe the process of skeletal muscle contraction by assembling the following 10 events in the proper order in paragraph form.
balu736 [363]

5) muscle fiber is stimulated at the neuromuscular junction triggering an action potential  

7) APs travel down the T-tubules to the sarcoplasmic reticulum  

Released acetylcholine (due to action potential within motor neuron) from the motor neuron initiates depolarisation within the sarcolemma, which is spread through the muscle fibre via T tubules.

8) in response to an AP, calcium ions are released into the cytosol/space around the myofibrils

Depolarisation causes the sarcoplasmic reticulum to release calcium ions necessary for the contraction

3) calcium ions bind to the T and T system

1) T and T system undergoes a conformational change, exposing the myosin binding sites on actin  

6) myosin head/cross-bridges bind to actin

The binding sites for the myosin heads located on actin, are covered by a blocking complex (troponin and tropomyosin) that can be unblocked by the calcium binding

2) myosin heads/cross bridges bind to actin and flex, shortening the sacromere  

4) actin filaments are pulled toward the center of the sacromere, shortening the muscle fiber  

As the individual sarcomeres become shorten the muscle fibres as a whole contracts

10) myosin head continues to attach, flex, release, extend, and reattach as long as calcium ions are present

9) calcium ions actively transported into the sarcoplasmic reticulum  

Relaxation of a muscle fiber occurs when a Ca ions are pumped back into the sarcoplasmic reticulum .

3 0
2 years ago
Is the vagus nerve the heart rate centre of the brain?
koban [17]

Answer:

The vagus nerve has two bunches of sensory nerve cell bodies, and it connects the brain stem to the body. It allows the brain to monitor and receive information about several of the body’s different functions.

Explanation:

The vagus nerve is the longest and most complex of the 12 pairs of cranial nerves that emanate from the brain. It transmits information to or from the surface of the brain to tissues and organs elsewhere in the body.

There are multiple nervous system functions provided by the vagus nerve and its related parts. The vagus nerve functions contribute to the autonomic nervous system, which consists of the parasympathetic and sympathetic parts

The vagus nerve has a number of different functions. The four key functions of the vagus nerve are:

-Sensory: From the throat, heart, lungs, and abdomen.

-Special sensory: Provides taste sensation behind the tongue.

-Motor: Provides movement functions for the muscles in the neck responsible for swallowing and speech.

-Parasympathetic: Responsible for the digestive tract, respiration, and heart rate functioning.

7 0
3 years ago
How did removing deer affect the tree population?
g100num [7]

Answer:

Explanation:By getting rid of the deer the tree population increased, the reason behind this is because the deers ate the plants which made less trees

6 0
3 years ago
Compare and contrast the traits of viruses and bacteria. Is a virus considered a living thing? Explain your answer in 3–5 senten
kkurt [141]

Answer:

Bacteria are single-celled organisms that live in different environments, including cold and hot, and they can also live on or inside the human body.

Most types of bacteria are harmless, on the contrary, they help in the process of digesting food, attacking other microbes and fighting cancer cells, and less than 1% of bacteria are bacteria that cause diseases.

As for viruses, they are very small organisms, smaller than bacteria, consisting of DNA and a protein that coat them, and unlike bacteria, a virus does not reproduce without its presence in the cells of living organisms.

3 0
3 years ago
51-54. Ibigay ang apat na prinsipyong nakapaloob sa pilosopiyang<br>Mandate of Heaven.​
Svetlanka [38]

Answer:

1) Ibinibigay ng langit sa emperador ang karapatang mamuno,

2) Dahil mayroon lamang isang Langit, maaari lamang magkaroon ng isang emperor sa anumang naibigay na oras,

3) Ang kabutihan ng emperador ay tumutukoy sa kanyang karapatang mamuno, at,

4) Walang isang dinastiya ang may permanenteng karapatang mamuno.

Explanation:

5 0
3 years ago
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