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JulijaS [17]
4 years ago
11

The external urethral sphincter surrounds the external urethral orifice. is composed of smooth muscle fibers. opens before the i

nternal urethral sphincter during the micturition reflex. is controlled by the somatic nervous system. All of the choices are correct.
Biology
1 answer:
Helen [10]4 years ago
5 0

Answer:

The correct answer is: is controlled by the somatic nervous system.

Explanation:

The urethra is an organ that is part of the urinary system, and consists of a tube that connects the urinary bladder to the urinary meatus, which is important for the excretion of urine. The urethra has two sphincters, which are muscles with the function to control the exit of the urine: <u>the internal urethral sphincter and the external urethral sphincter</u>.

The external urethral sphincter, unlike the internal one that is composed of smooth muscle, is made of skeletal muscle and is controlled by the somatic nervous system - this is what makes urination voluntary. Being the most external sphincter, it opens after the internal urethral sphincter during the micturition reflex.

Any damage in either sphincter can produce incontinence.

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What is the complementary strand of this dna segment: CCATGA
mart [117]

Answer:

GGTACT

Explanation:

GGTACT

CCATGA

In DNA, G pairs with C, and A pairs with T.

5 0
3 years ago
One group of students did an experiment to study the movement of ocean water. The steps of the experiment are listed below.
Delvig [45]

Answer:

Explanation:

The lamp and the ice bag were at the same place.  

Sounds like the experiment was intended to show on a small scale ocean currents from the poles to the equator and back to the poles. The bag of ice would simulate the cold at the poles while the lamp would simulate the heat provided by the sun near the equator. With that in mind, let's look at the possible flaws and see what is likely.  

Not enough ink was added.

 * If you can see the ink, then there's enough ink. So this isn't the correct choice.  

Not enough water was taken.

 * Possibility there wasn't enough volume of water to setup a current, but not too likely since the baking dish was filled. So let's look further. 

 The dish was too small for the experiment.

 * Same as above. It might be this, but there's something more likely. 

 The lamp and the ice bag were at the same place.

 * This sounds like a winner. In the real world, the poles are cold and the equator gets more sunlight. So there's a temperature gradient. In the described setup, both the heat sink (the bag of ice) and the heat source (the lamp) were at the same location.

6 0
3 years ago
What usually happens to the host’s DNA during the lytic cycle?
QveST [7]

Answer:

The correct answer is -

A.It is destroyed.

Explanation:

The lytic cycle is considered as one of the two reproductive cycles that virus use for its reproduction (the other cycle is the lysogenic cycle).

This cycle results in the destruction of the host cell.

Bacteriophages (virus that infects bacteria)  use this cycle and referred as virulent phages.

There are basically five steps in this cycle -

Attachment of virus with the host cell membrane, penetration of the genome, which is followed by biosynthesis using host machinery, assembly of virus particles, and finally release, causing host cell destruction.

Thus, option A is the right answer.

6 0
4 years ago
What is the function of the red arrow ?
ch4aika [34]

Answer:

A. Mobility

Explanation:

That Organism is a Prokaryote, The strings behind it helps the organism move around. If it didn't had those strings, the prokaryote would float around and it would have a hard time finding food to consume and survive.

6 0
3 years ago
what type of muscle is found only in the heart. It is A) smooth muscle. B) cardiac muscle. C) skeletal muscle. D) voluntary musc
Studentka2010 [4]
Cardiac muscle is found in only the heart because the heart is also called cardiac and said to have cardiac muscle.the answer is b. hope this helps :) 
5 0
3 years ago
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