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alukav5142 [94]
3 years ago
11

Is oil or biomass abundant

Biology
1 answer:
svet-max [94.6K]3 years ago
8 0
I can't remember but I think oil is
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I NEEED HELP AS QUICK AS POSSIBLE!!!
AysviL [449]

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the right answer is D

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2 years ago
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How do chemoautrophs make energy?
Mandarinka [93]

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hemotrophs are organisms that obtain energy by the oxidation of electron donors in their environment. Chemoautotrophs use inorganic energy sources to synthesize organic compounds from carbon dioxide. Chemoheterotrophs are unable to utilize carbon dioxide to form their own organic compounds.

Explanation:

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3 years ago
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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
Water exits the leaves of plants and enters the atmosphere. What is this process called?
monitta
If u are specificly talking about water in the air space of the leaf going out into the atm , than that's called simple diffusion .
4 0
3 years ago
Write down the clinical findings which are least suggestive of left-sided heart failure?
Arada [10]

Answer:

Adverse heart conditions do not occur in isolation. It is usually accompanied by other risk factors, like coronary artery dysfunction, diabetes, high blood pressure, etc.    

In addition to the above, the following factors are indicative of left-sided heart failure:

  • Shortness of breath caused by the collection of fluid in the lungs. Shortness of breath usually becomes pronounced upon physical exertion
  • An increase in the girth of the torso (mainly the abdomen) due to ascites which is the buildup of fluid in the abdomen.
  • engorged scrotum (in males of course)

Explanation:

Left-Sided Heart Failure is simply the inability of the heart to pump oxygen-rich blood into the body.

Blood filled with oxygen is moved from the lungs to the atrium on the left and then to the left ventricle. The blood is then pumped from the ventricle on the left to other parts of the body by a contracting and relaxing action. Left-sided heart failure can be classified into two:

  1. Systolic Failure and
  2. Diastolic Failure

1. Systolic Dysfunction: When the left ventricle can no longer shrink properly, the pressure with which the heart can pump enough blood into circulation is reduced.

2. Diastolic Dysfunction: This occurs when the left ventricle can no longer relax as it ought to due to the hardening of the muscle.

Cheers

7 0
2 years ago
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