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Crank
3 years ago
14

1) What is a sphincter muscle?

Biology
1 answer:
serious [3.7K]3 years ago
7 0

Answer:

1-A ring-shaped muscle that relaxes or tightens to open or close a passage or opening in the body.

2-Sphincters are specialized muscles that are located at the upper esophagus (upper esophageal sphincter (UES) and the gastroesophageal junction

Explanation:

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What three structures, in order, are involved of the production of mature sperm?
34kurt

Answer:

The three anatomical structures that, in order, contribute to the production of mature sperm are the epididymis, seminal vesicle and prostate.

Explanation:

The sperm and the first seminal fluid are produced and found initially in the seminiferous tubules of each testicle. From there they move on to several structures that contribute to the maturation process:

  1. Each <u>seminiferous tubule </u>drives the sperm to the epididymis, through the vas deferens, where the sperm can be for a long time and complete their maturation process.
  2. From the epididymis, the sperm pass to the seminal vesicle, which produces more seminal fluid to give nutrients to the sperm and facilitate its movement.
  3. Finally, and before being expelled outside, the seminal fluid receives the prostatic secretion in the prostatic urethra, a viscous and whitish liquid that completes the seminal fluid content.

The process of maturation of sperm is of  importance for the process of sexual reproduction.

Learn more:

brainly.com/question/1173367

6 0
3 years ago
Which small piece of dna molecule contains no base pairing errors
Katen [24]
I would have to say skin or hair
3 0
3 years ago
This is a question from my science class
marusya05 [52]

Answer:

Your answer is C.Malaria

Malaria is caused by mosquitoes while others are caused by fungus.

7 0
2 years ago
Read 2 more answers
How does Thermally Sensitive Liposomes Work?
Virty [35]

Answer:

Thermosensitive liposomes (TSL) are promising tools used to deliver drugs to targeted region when local hyperthermia is applied (∼40–42°C) which triggers the membrane phase transformation from a solid gel-like state to a highly permeable liquid state. Selective lipid components have been used to in TSL formulations to increase plasma stability before hyperthermia and speed drug release rate after. Two generations of TSL technology have been developed. The traditional thermal sensitive liposomes (TTSL) have utilized DPPC and DSPC as a combination. The second generation, lysolipid thermally sensitive liposomes (LTSL) technology, has been developed with incorporation of lysolipids that form stabilized defects at phase transition temperature. LTSL maintains certain favorable attributes:

High percentage of lysolipids incorporation;

Minimum leakage for therapeutical drugs encapsulation;

Ultrafast drug release upon heating (3.5 times enhanced compared to TTSL). For example, ThermoDox, a commonly used LTSL drug for cancer, has been reported to release 100% of the encapsulated doxorubicin within 30s;

First and most successful formulation for intravascular drug release.

Explanation:

https://www.creative-biostructure.com/Lysolipid-Thermally-Sensitive-Liposomes-Production-612.htm

7 0
3 years ago
The relationship between humans and their digestive bacteria can be described as... A) Commensalism B) Competition C) Mutualism
Flura [38]

Answer: The correct answer is -

C) Mutualism.

Explanation:

Mutualism is a type long term biological relationship between two organisms belonging to same or different species in which both are benefitted from one another.

For example - E.coli bacteria, present large intestines of human, gets food and place to live in our digestive tract. In return, the bacteria produce vitamin K, which make it harder for other disease causing bacteria to establish in our system.

Thus, option C) is the right answer.

7 0
4 years ago
Read 2 more answers
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