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avanturin [10]
3 years ago
8

Certain chest deformities prevent normal expansion of the chest. Explain why this makes ventilation difficult in terms of pressu

re and volume.
Biology
1 answer:
hram777 [196]3 years ago
3 0
The lungs work by expanding and going back to their original size when you inhale and exhale. The rib cage also expands so the lungs can have more air inside and expand. Due to deformities, the rib cage might not expand and/or the diaphragm might not lower itself, which might lead to pressuring the lungs not to expand and having a lower volume of air inside. This leads to breathing difficulties.
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What is not an example of negative feedback
svetoff [14.1K]
<h2>Answer:</h2>

<u>Blood clotting</u> is a positive feedback.

<h2>Explanation:</h2>

All the physiological process occurring in the body are monitored by two types of mechanism called negative feedback and positive feedback.  

Positive feedback is the reaction which occurs with the feedback from the actions the system has performed. The blood clot occurs with palette formation which is regulated with the blood lose (continuous feedback).

Negative feedback is a reaction that is the invert of the change distinguished, meaning it capacities to decrease the change. A change is recognized by a receptor and an effector is made to incite a contrary impact which facilitates further reaction.  

The physiological process such as shivering, sweating and digestion are examples of negative feedback.

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3 years ago
Which of the following cell organelles are directly responsible for making and packaging proteins A) Mitochondria, Golgi complex
viktelen [127]
<h2>Answer:</h2>

The correct sequence of organelles involved in making and packaging of proteins is option C: ribosomes, endoplasmic reticulum, and Golgi complex.

<h3>Explanation:</h3>
  1. The protein synthesis which is the translation of mRNA is done on <u>ribosomes.</u>
  2. As the protein is produced then it goes for modification in the <u>endoplasmic reticulum.</u>
  3. After some modifications proteins are packed into vesicles for the intercellular and intracellular transport.
  4. This packing is done in <u>Golgi apparatus.</u>



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3 years ago
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1. A fossil is determined through radioactive dating to be 1.5 million years old. This is an example of *1 point
guajiro [1.7K]
C)fossil aging and no i did not use google i knew this from 7th grade

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Answer and Explanation:

All cells come from other cells. during cell division, the parent cells divide forming other cells. The cells prepare for division by multiplication of genetic material so that daughter cells will have the same number of chromosomes as the parent cell, synthesis of new organelles such as centrioles and mitochondria and building up of energy stores in form of ATP to drive the cell through the entire process.

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