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
Ivenika [448]
3 years ago
14

Approximately how many known neurotransmitters are there

Biology
1 answer:
Mila [183]3 years ago
7 0
30-100 different molecule types
You might be interested in
Which cellular component is instrumental in maintaining homeostasis
almond37 [142]
Cell Membrane maintains homeostasis by controlling the flow of liquids entering and exiting the cell.
3 0
3 years ago
Explain the domain.How has it changed over the years?
dusya [7]
<h2>The Domain and its Changes </h2>

The domain is the range of mandate recognized or constrained by an appropriate leader or authority. In natural taxonomy, a domain is the leading level of taxonomic of bodies in the three-domain system of taxonomy composed by Carl Woese. It has changed over the years by changing the domain name of computers.


5 0
3 years ago
The contractile units of skeletal muscles are ________.
s2008m [1.1K]

The  contractile units of skeletal muscles are myofibrils. Thus,option A is correct.

<h3>What is skeletal muscles?</h3>

Skeletal muscles are 32 to 40% of total body mass. The type of muscles that connect  to bones and allow to perform a wide range of movements and functions.

Skeletal muscles are easily controlled and work according to the desire .

Skeletal muscles are specialized tissue that is connected to bones and allows movement.

Therefore, the  contractile units of skeletal muscles are myofibrils. Thus option 1st is correct.

Learn more about myofibrils here:

brainly.com/question/1194286

#SPJ1

8 0
1 year ago
In order to control occasional pain and inflammation, a person uses an over-the-counter drug containing ibuprofen. interestingly
EastWind [94]

The answer is Alzheimer's disease. The most feared psychological problem among the elderly is

Alzheimer's disease.  Alzheimer's is named for the first person to identify the disease.  It is a brain disease while stroke is a brain injury, less than 5% is likely to be suffering some form of dementia. 

5 0
3 years ago
Some species of millipedes will roll into a ball when threatened, while other species of millipedes can secrete noxious chemical
nikklg [1K]

Answer:

Stay safe from predators in their natural environments. I'm pretty sure this is the answer but it might not be.

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Organisms that belong to the same class must belong to the same
    10·1 answer
  • Nucleic acids and carbohydrates are both types of what?
    9·2 answers
  • The stage during which a prenatal child can open and close its eyes and can cry is the
    11·1 answer
  • What is the general term for the layers of tough membranes that cover and protect the brain and spinal cord?
    7·2 answers
  • At one time, dinosaurs lived on Earth. Today they are extinct. This relates to _____.
    10·1 answer
  • Sex-linked traits are passed from parent to child on a sex
    15·1 answer
  • Each enzyme has a temperature at which it works best. A slight increase in temperature can increase enzyme activity while a larg
    12·1 answer
  • Allele frequencies for a particular trait are shown over five generations for a population of sexually reproducing organisms.
    15·1 answer
  • What is the main function of environmental policy?
    11·1 answer
  • . Insulin controls the insulin level in ____________
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!