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belka [17]
2 years ago
8

Cardiac muscle fibers function to:

Biology
1 answer:
stiks02 [169]2 years ago
5 0
Cardiac muscle fibers function is to contract the heart.
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A student draws a fence with several gate as part of a model of cellular transport explain what defence indicates represent blam
Oksi-84 [34.3K]

The given question says that a student has constructed a model of cellular transport using fences and several gates.  

This model can be used to demonstrate the cellular transport.

The gates of the fences can be supposed as the protein pumps and the other fence demonstrates the lipid bilayer.  

Let’s suppose in the fence, there are many cattles, and outside, there are less cattles, but the student open the gate and bring more cattles inside the fence. In this case, the transport of the cattles is similar to the active transport of the molecules using protein pumps. At cellular level, the energy for the active transport is provided by ATP molecules.

Now, let’s say, the student wants to feed the cattles with some nutrition rich food, which can help in maintaining the health of the cattles. The student fills his car with the cattle food and he enters inside the fence through gates. In this case, the food was not present in the fence, but was abundant in the outside environment, so, the diffusion would occur. But food cannot come self, without help of others, so, the movement is facilitated by the car, as it is done by the carrier proteins. Hence, it is an example of facilitated diffusion.  


4 0
3 years ago
Which of the following is the primary cause of the rapid rise in loss of biodiversity?
xz_007 [3.2K]
The best and most correct answer among the choices provided by your question is the third choice or letter C.

Human activity is the primary cause of the rapid rise in loss of biodiversity.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
8 0
3 years ago
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Which two important things do many economics systems not considered to have value?
Alexxandr [17]
"A. Natural resources and human labour". I agree.
6 0
3 years ago
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PLEASE HELP WITH THIS ONE QUESTION
forsale [732]

Answer:

The fist option!

Explanation:

The energy investment phase of glycolysis involves the investment of two ATP molecules and results in the formation of two molecules of glyceraldehyde phosphate. Two molecules of NADH + H+ are produced. This is an example of a coupled reaction.

Hope this helps!

3 0
2 years ago
WILL GIVE BRAINLIEST!!
Paul [167]

Answer:

I would think Channel proteins but I could be wrong

8 0
2 years ago
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