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Natalija [7]
2 years ago
11

What are the advantages and disadvantages to the 24 hour new cycle?

Biology
2 answers:
Agata [3.3K]2 years ago
8 0

Answer:

answer

Explanation:

News staffers require fresh information to plug into websites, social media and rss feeds, so if you have a good story, share it.

VashaNatasha [74]2 years ago
5 0

Answer:

News staffers require fresh information to put it on websites, social media feeds.

Explanation:

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If you leave a candy bar in your car for a few hours in August, what process causes it to melt on the dashboard?
vredina [299]
Sun's particles travels through the windshield and hit the bar, the light will be changed to heat, so<span> radiation of the sun through the windshield</span>
6 0
3 years ago
Some of the nerve endings in the skin are sensitive to changes in temperature. They are part of a negative feedback mechanism re
Gemiola [76]

Answer:

Answer is option A (receptor).

These nerve endings represent a receptor in the negative feedback mechanism.

Explanation:

Homeostasis in the human body is the tendency of the body to maintain its internal environment suitable for normal and optimal functioning by adjusting the changes occurring in internal variables such as body temperature, blood pressure, etc using feedback mechanisms. The two feedback mechanisms involved in homeostasis are positive feedback (the output of the system stimulates the system to increase the output further) and negative feedback mechanisms (the output of the system stimulates the system to decrease the output).

The various components in the feedback loop include;

stimulus - an initiation event that causes changes in a variable.

variable - a physiological factor that is kept at a normal range.

receptors - monitor the variable, detect changes in the variable value and report to control center.

control center - it compares the variable value to the normal range and if any deviation is found, the effectors are activated.

effectors - return the value to the normal range by making adjustments in the same direction (positive feedback) or opposite direction (negative feedback) of the stimulus.

In the body’s thermoregulation mechanism, a negative feedback loop is used in which the variable is body temperature. The nerve endings in the skin that are sensitive to changes in temperature are called heat-sensitive thermoreceptors. They detect changes in body temperature and produce nerve impulses that signal the hypothalamus in the brain. The hypothalamus is the control center that compares the body temperature with the normal range and activates and controls different effectors such as muscles, blood vessels, adrenal glands, sweat glands, etc. These effectors controlled by the hypothalamus perform certain physiological activities that can return the body temperature to normal range.

When body temperature drops, the hypothalamus activates and control the effectors such as blood vessels to constrict in order to decrease the flow of heat to the skin, muscles to shiver in order to increase the production of heat, adrenal glands to secrete hormones (norepinephrine and epinephrine) in order to increase metabolic rates and heat production. All these effects cause the body temperature to increase and return to normal.

When body temperature rises, the hypothalamus activates and controls the effectors such as blood vessels to dilate in order to increase the flow of heat to the skin, sweat glands to release sweat, which on evaporation cools the skin. All these effects cause the body temperature to decrease and return to normal.

8 0
3 years ago
Why is a “ring if life “ more appropriate to describe the relationship between archaea,bacteria, and eukaryotes than a “tree of
KatRina [158]

A "ring of Life" is more appropriate to describe the relationship between archaea, bacteria, and eukaryotes than a “tree of life “, because each group of single-celled prokaryotic organisms produces something that is a necessity to another group of single-celled prokaryotic organisms. so therefor it is not like a tree of life which is more of a hierarchy than an everyone, and everything is equal Ring of Life.

3 0
2 years ago
Read 2 more answers
PLEASE HELP ASAP!!
garik1379 [7]
<span>How are the dark reactions that occur in plants dependent on the light reactions?
a.The chemical energy used in the dark reactions is produced in the light reactions.

Photosynthesis is divided into two parts.
1) Light - dependent reaction
2) Light - independent reaction

Light dependent reaction absorb energy from the sun to produce ATP and NADPH, these energies are used in the light-independent reaction. The ATP provides the energy, while the NADPH provides the electrons required to fix the carbon dioxide into carbohydrates.
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5 0
3 years ago
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The table below shows the characteristics of three components of the solar system labeled A, B, and C. Which choice identifies t
Tanzania [10]

Answer:

its B for sure.

Explanation:

4 0
3 years ago
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