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In order to survive in a constantly changing environment, the aerobic metabolism of organisms must be tightly regulated to maintain a constant state of homeostasis. List and explain one way that aerobic metabolism is regulated within cells.

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Patrina Schowalter
Patrina SchowalterLv2
28 Sep 2019
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Related questions

Basic Principles (pick the incorrect statement):

A) A group of cells of the same type that perform a specificfunction is referred to as a tissue.

B) All cells need energy to survive, and anaerobic metabolism ismore efficient than aerobic metabolism because it is faster.

C) While all animals must deal with the same fundamentalproblems, different animals may have different solutions.

D) A fundamental challenge for all multicellular organisms ismaintaining the asymmetric distribution of ions between differentcompartments.

In lung diseases such as emphysema or chronic bronchitis, there is chronic hypoxia that is particularly obvious in vascular tissues such as the lips or nail beds (cyanosis). Certain genetic diseases like α1-antitrypsin deficiency predispose to emphysema, as do environmental exposures like cigarette smoking or asbestos. Poorly perfused areas exposed to chronic hypoxia have decreased metabolic energy for tissue maintenance and repair. Which of the following is an important reason for this?

A. Increased hexokinase activity owing to increased oxidative phosphorylation

B. Increased ethanol formation from pyruvate on changing from anaerobic to aerobic metabolism

C. Decreased ATP generation and increased glucose utilization on changing from aerobic to anaerobic metabolism

Please explain why the correct answer is correct, and what makes the others wrong.

part 1

Homeostasis: Response to Stimuli

From the examples below, select the examples of cells or organisms responding to stimuli in order to maintain homeostasis.

1.)A plant bending toward a light source

2.)A cell bursting because it takes up too much water

3.)A person shivering when their body temperature is low

4.)A unicellular organism beating microscopic hairs to escape a chemical pollutant in its environment

5.)A cell dying due to a chemical poison

6.)An animal growing larger

7.)Ants moving within their mounds depending upon the time of day

8.)Iguanas laying in the sunlight if their body temperature is low

9.)Birds migrating when seasons change

10.)A person or animal getting sick because of infectious bacteria

part2 fill in the blank

A state of biological balance, or ____________ , is important for the survival of individual cells and ____________ alike.

Physiological factors such as ____________ , water levels, and pH must remain within a certain ____________ for cells and organisms to remain healthy and functional.

Regulation of the ____________ environment of cells and organisms is carried out through ____________ and other control ____________ .

choice of words:

location

external

hormones

mechanism

homeostasis

internal

groups

feedback

oganisms

temperature

range

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