1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alja [10]
3 years ago
9

At rest, a cell membrane is said to be ___________.

Biology
1 answer:
max2010maxim [7]3 years ago
7 0

Answer:

a. polarized

Explanation:

The whole living cell and in particular the nerve cells show electric potential difference between the inner and outer faces of their cell membrane.

The resting potential of a cell refers to the difference in electrical potential that the inner and outer faces in the membrane of a neuron that is not transmitting nerve impulses. The resting potential value is around -70mV (milliVolts). The negative sign indicates that the interior of the cell is negative relative to the exterior.

The existence of the resting potential is mainly due to the difference in concentration of sodium (Na +) and potassium (K +) ions inside and outside the cell. This difference is maintained by a mechanism of active ion pumping through cell membranes, in which sodium is forced out of the cell and potassium in.

At rest, the alternation between passive and active ion transport occurs. There is passive input of sodium (Na +) ions, which are subsequently actively expelled, while potassium (K +) ions enter actively. Then K + passes passively from the cell, making the external medium positive relative to the internal medium. With this, the cell becomes polarized.

You might be interested in
An organism is multi-cellular, cannot move about freely, lives on land, and decomposes other organisms for food. Into which king
tia_tia [17]

Answer:

Fungus, because Protist and Archaea are both single-celled, then Plants get their food from the sun, while Fungus is multi-cellular and decomposes other organisms for its food

Explanation:

3 0
3 years ago
Read 2 more answers
PLZ HELP!!!!!!!!!!!!!!! DUE TODAY!!!!!
inessss [21]

1.each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy.

A scavenger is an organism that mostly consumes decaying biomass, such as meat or rotting plant material. Many scavengers are a type of carnivore, which is an organism that eats meat. While most carnivores hunt and kill their prey, scavengers usually consume animals that have either died of natural causes or been killed by another carnivore.

Scavengers are a part of the food web, a description of which organisms eat which other organisms in the wild. Organisms in the food web are grouped into trophic, or nutritional, levels. There are three trophic levels. Autotrophs, organisms that produce their own food, are the first trophic level. These include plants and algae. Herbivores, or organisms that consume plants and other autotrophs, are the second trophic level. Scavengers, other carnivores, and omnivores, organisms that consume both plants and animals, are the third trophic level.

Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. The majority of nitrogen is fixed by bacteria, most of which are symbiotic with plants. Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria.

4 0
3 years ago
<img src="https://tex.z-dn.net/?f=2%20%5Cfrac%7B1%7D%7B3%7D%20%20%20%2B%203%20%5Cfrac%7B5%7D%7B7%7D%20" id="TexFormula1" title="
Agata [3.3K]
6 for the top in the middle 5 down is 10
6 0
3 years ago
Read 2 more answers
Helpppppp HAHAHAHHAHA IM STRUGGLING
OlgaM077 [116]

Answer:

Option D = 3.4 g/mL

Explanation:

Given data:

Volume of water = 21.2 mL

Volume of water + object = 27.8 mL

Mass of object = 22.4 g

Density of object = ?

Solution:

First of all we will calculate the volume of object.

Volume of object = Volume of water+ object - volume of water

Volume of object = 27.8 mL - 21.2 mL

Volume of object = 6.6 mL

Density of object:

d = m/v

d = 22.4 g/ 6.6 mL

d = 3.4 g/mL

4 0
3 years ago
7. What is the total speed of a light beam emitted from a satellite travelling at 10 miles per second? (show all
Arturiano [62]
The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light.
3 0
3 years ago
Other questions:
  • Why are some cells in interphase longer than others?
    14·1 answer
  • This can contribute to desert formation:
    5·2 answers
  • If you were looking for a place to build a new downhill ski area, which type of map would be most helpful?
    9·1 answer
  • While performing an experiment at home, Emma adds lemon juice to a soap solution. How will this affect the pH of the soap soluti
    5·1 answer
  • Why must the bonds of these molecules be broken before anything else happens?
    6·1 answer
  • You wanted to prepare a fish dish for your grandfather that he loves the dried salted Codfish. But
    5·1 answer
  • Worth 26 points! Help me please! Do 1,2,3 by filling in the blank!!!! And I will make you brainest!
    7·2 answers
  • 2. Modem wolves developed their traits through natural selection. What occurs during the
    12·1 answer
  • Which statement is true?(30 Points)
    13·1 answer
  • Which is one factor of rock types that affects the rate of weathering?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!