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2 years ago

The altitude of polaris measured by an observer at the tropic of cancer is.

Medicine

1 answer:

Orlov [11]2 years ago

3 0

Answer:

At the Tropic of Cancer, the elevation of the Sun changes from 66.5 (V.E.) to 90 (S.S.) to 66.5 (A.E.) to 43 (A.S.). At the equator, the elevation of the Sun changes from 90 (V.E.) to 67 (S.S.) to 90 (A.E.) to 67 (A.S.).

Explanation:

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Put these events in the correct chronological sequence.

In-s [12.5K]

Answer:

The correct answer will be:

1. Acetylcholine binds to receptors on the motor end plate

2. Chemically-regulated ion channels open, causing depolarization

3 End plate potentials trigger action potential(s).

4. Transverse tubules convey potentials into the interior of the cell

5. Ca++ is released from the sarcoplasmic reticulum

6. Ca++ binds to troponin, pulling on tropomyosin

7. Binding sites on actin are uncovered, allowing myosin to bind and carry out power strokes

8. Force increases.

9. Ca++ is pumped (re-sequestered) into the sarcoplasmic reticulum

10. Force decreases.

Explanation:

The muscle contraction is a highly controlled mechanism which begins at the neuromuscular junction with the release of the acetylcholine neurotransmitter. This neurotransmitter causes the depolarization of the membrane by binding to the receptors of the motor end plate which generates an action potential. This action potential is transmitted via T-tubules from sarcolemma to the sarcoplasmic reticulum.

The sarcoplasmic reticulum releases calcium ions which binds to the troponin protein. This troponin removes the protein tropomyosin from the actin causing the rotation of the tropomyosin exposing the binding sites for myosin. The myosin binds to the actin using energy from the ATP which pulls the actin causing contraction. Another ATP binds the myosin head which weakens the bond between myosin and actin which releases the myosin which decreases the force between them decreases and the muscles relax.

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3 years ago

Which proffession is passed form one generation yo another generation ?

Zigmanuir [339]

Answer:

family store or restaurant/// family company

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3 years ago

Who the author of the book " Flawed "

Finger [1]

Answer:

The author of the book of flawed was "Cecelia Ahern"

Explanation:

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6 0

3 years ago

Some research studies suggest that chromium may play a role in decreasing the risk of developing?

Stella [2.4K]

Chromium may play a role in decreasing the risk of developing diabetes and insulin resistance. It can lower the level of glucose and improve insulin sensitivity .

Chromium deficiency may increase blood sugar , cholesterol level, increase the risk for a number of conditions and triglycerides.Fatty acids and cholesterol synthesis stimulates chromium which important for brain function and other body processes.

Chromium helps in keep blood sugar levels normal by improving the way the body uses insulin. If the level of chromium is high in the body then stomach problem and low blood sugar and can damage the liver, kidney and nerves.

To learn more about the Chromium here

brainly.com/question/15433549

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2 years ago

The least used measuring parameter for dosage calculations is?

Mashutka [201]

The least used measuring parameter for dosage calculations would be— length.

3 0

3 years ago

Read 2 more answers