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arlik [135]
3 years ago
10

Define the respatory system

Biology
1 answer:
Mumz [18]3 years ago
7 0

The respiratory system is a biological system consisting of specific organs and structures used for gas exchange in animals and plants

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What is the correct order FROM SMALLEST TO LARGEST ( DNA, Genes, Nucleus, Chromosomes)
Fantom [35]

Answer:

1.Genes

2.DNA

3.Nucleus

4.Chromosomes

Explanation:

5 0
2 years ago
What is the frequency in vibrations per second of a 200 hertz wave?
Annette [7]
Once you understand this, its pretty simple. 50 hertz= 50 vibrations. 100 hertz=100 vibration. So to answer your question 200 hertz=200 vibrations. Your answer is C. 
8 0
3 years ago
Choose the functions of amino acids (free or in a bound form):A. carriers of genetic information B. neurotransmitters C. enzyme
Citrus2011 [14]

Answer: B. Neurotransmitters; C. Enzyme components; E. Hormones

Explanation: Aminoacids have a variety of functions because they can create proteins. These long and complex molecules perform important roles in different biological processes: they are responsible for the formation of enzymes and hormones. In neurotransmitters, the glutamate appears to be related to functions of the brain, like learning and memory. Other functions of the aminoacids are regeneration of muscular cells, have a role in imunology, growth of tissue, production of collagen and others.

7 0
4 years ago
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When conducting a scientific experiment should you test more than one variable at a time?
KIM [24]
No only test on variable at a time or els you may get incomplete results
4 0
3 years ago
Bone formation begins when ____________ secrete the initial semisolid organic form of bone matrix called ____________ .
butalik [34]

Answer:

a. osteoblasts

b. osteoid

Explanation:

Osteoblasts are the fundamental cell of bone tissue. They are the cells that synthesize the bone matrix called osteoid from which it is made from the skeleton of bone fish, to the skeleton of humans. Since the bone skeleton is an evolutionary paraphiletic characteristic (it is present in several taxonomic groups that have evolved from the same ancestor).

Osteoblasts are responsible for the development and growth of bones during the juvenile stage of individuals and are also responsible for maintaining adult bone and regenerating bone when it breaks.

Osteogenesis is the process of differentiation of osteoblasts. The cells from which osteoblasts differ are called osteoprogenitors. The differentiation of osteoprogenitor cells, which come from the mesoderm, periosteum or bone marrow, is induced by growth factors called bone morphogenetic proteins (BMPs), capable of inducing the growth of bone, cartilage or connective tissue. When an osteoprogenitor cell receives a BMP signal, it quickly begins to express the genes to generate collagen, osteonectin and alkaline phosphatase, among other compounds necessary for bone growth. When the bone grows, it ends up wrapping some of the osteoblasts and they lose their ability to replicate, at that time they are dedicated to bone maintenance and not to their synthesis and are called osteocytes.

6 0
3 years ago
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