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
Lorico [155]
3 years ago
13

Prior to the arrival of a signal from a presynaptic input, the post-synaptic membrane is polar with a greater relative _________

___ charge in the ecf.
Biology
1 answer:
fredd [130]3 years ago
4 0

Answer;

-Positive charge

Prior to the arrival of a signal from a presynaptic input, the post-synaptic membrane is polar with a greater relative positive charge to the ECF

Explanation;

-Neurons talk to each other across synapses. In somatic neurons, an action potential arrives at the synapse causing synaptic vesicles to fuse with the presynaptic membrane. The pre-synaptic membrane releases acetyl choline via exocytosis into the extracellular of the synaptic cleft.

-The ACh diffuses across the cleft and binds to the ligand-regulated sodium channels. Activated sodium channels allow a rapid diffusion down its electrochemical gradient towards the ICF. The movement of positive charges to the ICT causes the relative charge across the membrane to become positive on the inner surface.


You might be interested in
Where can you observe environmental changes that are forcing adaptation?
Helen [10]

Answer:

Description

Since its inception, life on earth has had to adapt to changing environmental conditions - this represents a driving force of evolution.

This module examines how organisms detect and respond to changes in their environment, and reviews the different behavioural, physiological and molecular mechanisms underpinning environmental (stress) adaptation.

Understanding these organism-environment interactions forms the very foundations of ecology. Examples are provided from a range of organisms, but a specific focus is given to terrestrial invertebrates (insects) and plants.

The term “environment” covers a broad spectrum of spatial scales, from changes occurring at the cellular level, to large scale geographic differences between major climatic zones (polar, temperate and tropical).

The process of “change”, and adaptation to these changes, will in turn be discussed across a broad spectrum of timescales. These include:

The requirement for rapid adaptation to potentially dramatic shifts in environmental conditions, e.g. when a parasite first enters its host

Longer-term changes and adaptations across seasonal timescales, e.g. hibernation/insect diapause

Adaptation on an evolutionary timescale, e.g. the ‘Red Queen’ hypothesis, across scenarios of past environmental changes, and extending out to current predictive climate change models

The main aims of this module are to provide students with information, guidance, and access to resources, that will allow them to:

Gain an in depth understanding of how organisms respond and adapt to changes in their environment.

Recognize that the term “environment” covers a continuum of spatial scales from molecular environments within cells, to broad-scale geographic environments and climatic zones.

Appreciate that adaptation to environmental change for an individual organism is transient and occurs across a temporal spectrum of seconds to seasons. For species, adaptation is long-term, but not fixed/permanent, and occurs across a timescale of generations.

Interpret the potential impact of climate change on species, communities and ecosystems. Specifically with respect to how the rate of environmental change may limit effective adaptation, and so result in changes in species distribution and abundance patterns

Become effective independent learners, capable of analysing and interpreting the scientific literature to help formulate and express their own ideas

Explanation:

hope it help to you read rhis to answer your question po

7 0
2 years ago
Which statement best describes herd immunity? To provide cows and other live stock with vaccines so diseased do not spread among
Ugo [173]

Answer:

a To provide cows and other live stock with vaccines so diseased do not spread among farmers and cattle herders.

Explanation:

because that one makes the most sense and it is true

5 0
2 years ago
How does a hypothesis help scientists understand about the natural world?
katrin2010 [14]
By performing controlled experiment that are tested by gathering more data based on observations
7 0
3 years ago
In what type of organs are the cells that enter meiosis 1 found
allsm [11]

Answer:

gonads, ovaries and testes

Explanation:

if im right, can i get the crown

8 0
2 years ago
3) Besides pH, what other soil factors affect producers?
Leni [432]

Answer:

3) Drainage capacity

   Soil minerology (Nutrients)

4)To produce their own food i.e. photosynthesis

6 0
2 years ago
Read 2 more answers
Other questions:
  • A researcher is studying the transport of material within a cell. A microscopic slide prepared using rat liver tissue showed tha
    5·1 answer
  • What are examples of directional selection
    13·1 answer
  • Where does the creation of oxygen occur?
    14·1 answer
  • Which two large landmasses formed when Pangaea first started to separate?
    12·2 answers
  • List four reasons water is important to life on earth
    9·1 answer
  • Which of these are characteristics of reptiles? Check all that apply.
    13·1 answer
  • If meiosis continues in this case and produces gametes, what statement concerning their genetic variability would be MOST accura
    6·1 answer
  • PLEASE ANSWER FAST 10 POINTS AND BRAINLIEST WITH 5 STARS
    9·2 answers
  • Why are diseases transmitted by vectors harder to control than othwrs
    6·1 answer
  • ………………………dguhbjirviuhb
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!