Question 11 (1 point) What prevents backflow of urine into the kidneys? O

Biology

1 answer:

Greeley [361]2 years ago

5 0

Answer:

#Mitral valves

There is a valve at the meeting point between each ureter and the bladder to prevent the backflow of urine into the kidneys.

Urinary reflux means that one (or both) of these valves is not working properly.

If you have urinary reflux, during urination the urine travels up the affected ureter to the kidney instead of flowing out of the body.

Urinary reflux most commonly occurs in babies and children.

In most cases, the valve will correct itself as a child grows and matures.

In severe cases, surgery may be needed to remodel the valve.

#Urine flows from each kidney through tubes called ureters and into the bladder. When the bladder is full, it squeezes and sends the urine out through the urethra. No urine should flow back into the ureter when the bladder is squeezing. Each ureter has a one-way valve where it enters the bladder that prevents urine from flowing back up the ureter.

You might be interested in

Why should wilderness designation and management consider adjacent land uses? A) because activities in adjacent lands can direct

bija089 [108]

Answer:

A on edge

Explanation:

8 0

2 years ago

Who is the father of genetics and what was his contribution?

max2010maxim [7]

Answer:

The father of genectics is mendel, and he had shaped genectics as we know it today

Explanation:

6 0

2 years ago

Read 2 more answers

Differences in traits such as hair texture are determined by differences in-

rosijanka [135]

Genetics is what I would say

8 0

2 years ago

Who challenged the idea that insects appeared spontaneously in decomposing meat?

ladessa [460]

Francesco Redi was the first scientist to disprove and challenge the spontaneous generation theory. He experimented on how flies distributed their eggs on the meat which caused flies to arose. Thank you for your question. Please don't hesitate to ask in Brainly your queries.

3 0

2 years ago

Please also describe how actin-binding sites are made available for cross-bridging with myosin heads during contraction.

yaroslaw [1]

Answer: The calcium ion binds to troponin, and this slides the tropomyosin rods away from the binding sites.

Explanation:

Contraction and relaxation of muscle cells brings about movements of the body. The contractile myofilament called sarcomeres are bounded at each end by a dense stripe called the Z - line, to which the myosin fibres are attached, and lying in the middle of the sarcomere are the actin filaments, overlapping with the myosin.

When action potential spreads from the nerve along the sarcolemma (muscle cell membrane), it penetrates deep into the muscle cell through the sarcoplasm (cytoplasm of muscle cell), and releases CALCIUM from the intracellular stores.CALCIUM triggers the binding of myosin to the actin filament next to it forming CROSS BRIDGES.

For this to occur, ACTIN BINDING SITE has to be made available. TROPOMYOSIN is a protein that winds around the chains of the actin filament and covers the myosin-binding sites to prevent actin from binding to myosin. The first step in the process of contraction is for calcium ions to bind to troponin so that tropomyosin can slide away from the binding sites on the actin strands.

3 0

2 years ago