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
Readme [11.4K]
3 years ago
10

The iris in the human eye contracts and expands, controlling the amount of light that reaches the retina. What types of muscle c

ontrol this?
skeletal and voluntary
smooth and cardiac
skeletal and smooth
smooth and involuntary
Biology
1 answer:
saveliy_v [14]3 years ago
3 0

Answer:smooth and involuntary

Explanation:the sphincter papillae are muscles responsible for narrowing the pupil, while the dilator papillae makes the pupil larger. Both of them are smooth types of muscles, that are controlled by nerves, sending signals from the brain about the light conditions.

You might be interested in
What are three structural diffences between the animal and plant cell?
PSYCHO15rus [73]
Three structural differences between plant and animals cells are: Plant cells<span> have</span><span> chloroplasts, a cell wall and a large central vacuole, all of which are not found within </span>animal cells<span>.</span>
8 0
3 years ago
Read 2 more answers
Where can ribosomes be found in addition to on the rough endoplasmic reticulum?
gizmo_the_mogwai [7]
The correct answer is B. In the cytoplasm of the cell.

In addition to on the rough endoplasmic reticulum ribosomes can be found in the cytoplasm of a cell. 

Explanation; 
Ribosomes are cellular organelles that functions in making of proteins. They contain special proteins and nuclei acids.
Ribosomes can  be found in two different spaces in eukaryotic cells; that is, on the rough endoplasmic reticulum and floating in the cytoplasm of a cell. In the cytoplasm they are not bound to anything as they are in the rough endoplasmic reticulum. 

6 0
3 years ago
What is an electrically charged atom? A. ion B. isotope C. molecule D. compound
Alenkinab [10]

The answer is A because it’s  produced by either moving or removing electrons from the neutral atom

7 0
3 years ago
Read 2 more answers
Why is it necessary to have enzymes for life process
svp [43]

Enzymes are proteins that control the speed of chemical reactions in your body. Without enzymes, these reactions would take place too slowly to keep you alive. Some enzymes, like the ones in your gut, break down large molecules into smaller ones.

6 0
3 years ago
Read 2 more answers
What happens to biodiversity<br> and ecosystems when the<br> environment changes?
natita [175]
Answer: Loss of biodiversity appears to affect ecosystems as much as climate change, pollution and other major forms of environmental stress, according to results of a new study by an international research team. ... Studies over the last two decades demonstrated that more biologically diverse ecosystems are more productive.hope this helps:)!
3 0
3 years ago
Other questions:
  • In one to two sentences, evaluate why some scientists think the winter weather near the Western European coast might change in t
    15·1 answer
  • By going through glycolysis, krebs cycle, and electron transport chain, a cell can make between _____ and ______ atp as opposed
    10·1 answer
  • Nerve endings in the skin are located in the
    5·1 answer
  • Each of the following are descriptions of Physical properties except ____.
    10·1 answer
  • Give an example of how structure and function are related in an organism
    14·1 answer
  • Which of the following is a way that new DNA can be introduced to bacteria?
    8·1 answer
  • Which one of the following choices refers to an excision of the iris to treat glaucoma?
    13·1 answer
  • As part of your independent study in field biology, you are sent to a small, inland sea. In one of your samples, you discover a
    10·1 answer
  • Why do lions need each other to help catch prey​
    12·2 answers
  • Does anyone have the answer key to the "muscles and bones gizmo student exploration"?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!