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3 years ago

What is a situation where your sympathetic nervous system would be active? Give me an example from real life.

Biology

1 answer:

romanna [79]3 years ago

7 0

Answer:

A situation where your sympathetic nervous system would be active would be when you are running because your heart rate would increase.

Explanation:

Your sympathetic nervous system is in control of your heart rate, blood pressure, and blood vessels, so if you are running, your heart rate is speeding up, caused my this specific part of the nervous system.

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What is a protein that catalyzes chemical reaction for organisms

tankabanditka [31]

Each atom becomes different from the next by having different number combinations of these subatomic particles. The different numbers of protons electrons and neutrons determine different elements or in other words a pure substance made from a solitary kind of atom
Every element has different qualities or physical characteristics for example oxygen and gold The former is a gas that is one of many elements making up organic matter Where as the latter is solid and inert a non-reactionary element

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3 years ago

Which conclusion can be made from the observation below?

Brums [2.3K]

The feather fell slower because it encountered more air resistance.

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3 years ago

Sparrows with average-sized wings survive severe storms better than those with longer or shorter wings, illustrating

Artyom0805 [142]

Answer:

The correct answer is option B) "stabilizing selection".

Explanation:

Stabilizing selection is a type of natural selection at which mean traits are favored by nature instead of extreme values. In this case at which sparrows with average-sized wings survive severe storms better than those with longer or shorter wings illustrates stabilizing selection. It its believed that this type of selection is the most commonly found in nature, since most traits have no extreme values in most of the species.

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3 years ago

Describe the experiment, to show that light intensity, water, chlorophyll, and cabondioxide are needed for photosynthesis

lisov135 [29]

Answer:

Is light needed for photosynthesis?

1. Destarch the plant (remove previously made starch from plant)

2. a. cut the leaf in 2

b. 1 part in an opaque box and 1 part in a transparent box (one with light and one without)

3. Test for starch (BEWI)

B. Is carbon dioxide needed for photosynthesis?

1. Destarch the plant (remove previously made starch from plant)

2. a. cut the leaf in 2

b. 1 part in a box with CO2 absorber and 1 part in box with a CO2 provider

3. Test for starch (BEWI)

C. Is chlorophyll needed for photosynthesis?

1. Destarch the plant (remove previously made starch from plant)

2. Use a variegated leaf

3. Test for starch (BEWI)

B E W I

1. Put leaf in boiling water to destroy the cell membrane and denature enzymes

2. Ethanol in a hot water bath to remove chlorophyll

3. Warm water to soften the leaf

4. Add drops of iodine solution

Explanation:

3 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