1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Stella [2.4K]
3 years ago
9

What chemical ion is responsible for initiating the contraction of a muscle fiber?

Biology
1 answer:
Semenov [28]3 years ago
4 0
Calcium ion is responsible for Muscle Contractions.
You might be interested in
What air pollutants causes a reddish-brown haze in the sky?
Mars2501 [29]

Answer: Nitrogen dioxide

Explanation:

7 0
3 years ago
In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive. What are the possible combin
almond37 [142]
The possible combinations are as follows 
          
      R      r
R   RR   Rr
r     Rr    rr

so you would have a ratio of   1RR : 2Rr : 1rr


3 0
3 years ago
Which of the following statements are true?a. Triacylglycerols (triglycerides) always contain three identical fatty acids.b. Uns
ratelena [41]

Answer:

B, C, E.

Explanation:

Unsaturated fats are more likely than saturated fats to be liquid at room temperature. (because saturated fats are solid at room temperature and unsaturated fats are liquid at room temperature).

Triacylglycerols (triglycerides) are composed of fatty acid residues and glycerol. (because by the reaction between glycerol and 3 long chain fatty acid triglycerides formation occurs and form 3 ester linkages).

Fats that contain more unsaturated fatty acid residues than saturated fatty acid residues are more likely to be liquid at room temperature. (because saturated fats are solid at room temperature and unsaturated fats are liquid at room temperature).

8 0
3 years ago
Which process takes place in the cells of spirulina that does not occur in the cells of a human?
g100num [7]
<span>photosynthesis i believe

</span>
7 0
3 years ago
biologists in darwin's time had already begun to understand that living things change over time. down did darwin contribute to t
Lemur [1.5K]

Answer:

He figured out and explained how these changes happened and supported his ideas with evidence

4 0
3 years ago
Other questions:
  • As distance from Earth’s surface increases, the temperature of the stratosphere
    9·1 answer
  • Where does a vulture obtain his energy
    12·1 answer
  • In watermelons, solid green rind color (G) is dominant to stripes (g).
    9·1 answer
  • Please help me will give you lots of points :)
    12·1 answer
  • The diagram shows a simple cycle of photosynthesis and cellular respiration.
    7·1 answer
  • March the following parts of a flower with their description
    14·1 answer
  • There was snow and a 25 mph wind on Monday. On Tuesday, there was rain and a 10 mph wind. Which changes to the weather component
    10·1 answer
  • Please help me with the image that I am going to attach! I am very confused
    7·2 answers
  • What types of organisms can carry out photosynthesis?
    6·2 answers
  • n this experiment, you need to examine the idea of thermal energy transfer. Using a controlled experiment, what might a good que
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!