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emmainna [20.7K]
3 years ago
9

What is the role of calcium in muscle contractions?

Biology
1 answer:
Firdavs [7]3 years ago
5 0

Answer:

Inside the muscle, calcium facilitates the interaction between actin and myosin during contractions (2,6). ... Calcium binds to the troponin, causing a position change in tropomyosin, exposing the actin sites that myosin will attach to for a muscle contraction (5,6). Blood Clotting. Without calcium blood would not clot.

Explanation:

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The bone are composed of two parts which are what?
zalisa [80]

Answer:

the shaft and the bone marrow

Explanation:

A hard outer layer called cortical (compact) bone, which is strong, dense and tough. 2. A spongy inner layer called trabecular (cancellous) bone. This network of trabeculae is lighter and less dense than compact bone.

<h2>mark me brainliest please</h2>
6 0
3 years ago
Name and describe the key components of the two major divisions of the nervous system.
defon

The Central Nervous System

     -Serves as the control center for the body

The Peripheral Nervous System

     -Sends information to and from the brain and spinal cord

     -Divided into the sensory somatic nervous system and the autonomic nervous<span> <span>system</span></span>

3 0
3 years ago
2. A cell in the leaf of a green plant performs both photosynthesis and cellular respiration, often at the same time. Which stat
quester [9]
<h3>♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ The correct answer would be D. Products of one process are used as some of the reactants for the other processes.

As you may know, the formula for photosynthesis is:

carbon dioxide + water ==> oxygen + glucose

And the formula for respiration is:

oxygen + glucose ==> carbon dioxide + water

The reactants for one are the products for the other and vice versa. This is why it would be the correct option.

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

4 0
3 years ago
Read 2 more answers
Analyzing the following tree, prove the relationship between ray-finned fish and crocodiles using the characteristics given belo
7nadin3 [17]

Answer:

The Ray- Finned Fish has a bony skeleton just like crocodiles. Crocodiles evolved more and adapted to their environment. Along the way Crocodiles grew to have four limbs, were born from an amniotic egg, and then their eggs also have shells, unlike the Ray-finned fish. Therefore the three characteristics they do NOT have in common are: Four Limbs, Amniotic Egg, and Eggs with Shells. The one trait they do have in common is Bony Skeletons. They also both have vertebrae.

7 0
3 years ago
Feeling a little stressed? you take a few deep breaths and calm down what nerve​
lara [203]

You use your lungs to take deep breaths and it calms all your nerves

HOPE THIS HELPS

[[I play roblox my account is -----> XxfireheartdragonxX

6 0
3 years ago
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