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3 years ago

How many neuromuscular junctions are in each muscle cell

Biology

1 answer:

yuradex [85]3 years ago

5 0

Answer: One

Explanation:

A neuromuscular junction is a chemical synapse between the muscle fibre and the motor neuron. It helps the motor neuron to send a signal to the muscle fibre, triggering contraction in the muscle.

One Muscle Fiber has one neuromuscular junction in most skeletal muscles. A mature neuromuscular junction is innervated by one motor nerve terminal ; thus, the relationship between a given muscle fibre and motor neuron is one-to-one.

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What surrounds the cell and controls the movement of substances in and out

Nonamiya [84]

Answer:

The plasma membrane is made up by a phospholipid bilayer with embedded proteins that separates the internal contents of the cell from its surrounding environment. Only relatively small, non- polar materials can easily move through the lipid bilayer of the plasma membrane.

Explanation:

7 0

3 years ago

Symmetry means being made up of exactly similar parts. If your parts go around a central point, you have what kind of symmetry?

Lera25 [3.4K]

The answer is B. Radial

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3 years ago

A person dealing with mental health issues can have a stigma against themselves and others dealing with behavioral health.

sineoko [7]

True and that happens a lot

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3 years ago

One g of fecal matter was suspended in 99 ml saline solution (tube 1). After mixing gently but thoroughly, one ml from tube 1 wa

malfutka [58]

Answer: the cfu/g Gram-negative bacteria in the fecal sample is C = 3.0 × 10^3

Explanation:

We know that; Gram negative bacteria looks pale reddish in color under a light microscope from Gram staining.

therefore

There are 30 red bacterial colonies counted.

1 mL of from tube 1 was removed and added to tube with 99 mL saline (tube 2) dilution is 1/100.

transferred volume into the plate is 1 mL.

Now, we have to determine the cfu/g Gram-negative bacteria in the fecal sample

Formula to calculate CFU/g bacteria in fecal sample is expressed as;

C = n/(s×d )

where C is concentration (CFU/g) , n is number of colonies , s is volume transferred to plate , d is dilution factor.

so we substitute

C = 30 / ((1/100) × 1)

C = 30 / 0.01

C = 3000

C = 3.0 × 10^3

THERFERE, the cfu/g Gram-negative bacteria in the fecal sample is C = 3.0 × 10^3

3 0

3 years ago

Muscle tone is ________. the condition of athletes after intensive training the ability of a muscle to efficiently cause skeleta

Sedbober [7]

Answer:

a state of sustained partial contraction

Explanation:

Simply said, muscle tone means that there is a sustained tension in a muscle wile in a determinate posture. The muscle tone enable us to mantaing our bodies in a posture fit for resting or for also working, like sitting, being stand up or in a couch or sleeping. The changes in the muscle tones make us able to move. So contractions will follow depending what activity we are engaged on, as a continous and passive partial contraction of muscles change following changes in direction.

Muscle tones have contractions that do not produce enough tension to move, buy they keep it tense and firm.

Thererefore the tension is balanced and resting muscle tone balances bones and joints.

See below :)

In physiology, medicine, and anatomy, muscle tone (residual muscle tension or tonus) is the continuous and passive partial contraction of the muscles, or the muscle's resistance to passive stretch during resting state. It helps to maintain posture and declines during REM sleep.

6 0

3 years ago