Option A,
both limit movement of substances through the system
The sphincter muscle usually surrounds the openings in the body such as urethra, anus and performs the function of tightly closing the openings. When once the messages are received from the nervous system the sphincter relaxes and releases the material out of the opening during urination of excreting
The same is the function of valves in the circulatory system. They also prohibits the entry of blood from one chamber to other and then to the main circulatory system. The relaxes on receiving a signal from the brain and thus transfer blood from one chamber to the other.
Answer:
Image 3
Explanation:
Prokaryotic cells are single-celled organisms that lack membrane-bound organelles, including a defined nucleus.
The only cell without membrane-bound organelles is image 3
Image 1 is a single-celled eukaryotic organism, probably a paramecium.
Image 2 is a plant cell (has a cell wall)
Image 3 is a bacterium
Image 4 is an animal cell
Runoff is the stage of hydrologic cycle
4m/s²
Explanation:
Given parameters:
Velocity of the ride = 6m/s
radius of the ride = 9m
Unknown:
Acceleration of ride = ?
Solution:
We are going to solve this problem using the formula for centripetal acceleration:
Centripetal acceleration = ![\frac{[tex]V^{2}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Btex%5DV%5E%7B2%7D)
}{
}[/tex]
V is the velocity
r is the radius
Centripetal acceleration = 
= 4m/s²
Learn more:
Acceleration brainly.com/question/11025333
#learnwithBrainly
Hello there,
It is known as the chyme, a semi-liquid <span>mass of partly digested food that is expelled by the stomach.
</span>
Hope this helps :))
~Top
