Muscular System

Skeletal, smooth, cardiac

The quadriceps group of muscles. Rectus Femoris more specifically.

there are a lots of reasons.. the most common one would be cold. when your body temperature decreases it causes the arterioles under the skin to constrict which results in decrease in heat loss from the body.

the other reasons would be neurogenic vasoconstriction during minor trauma to skin, and many more less common causes.

They are sphincters. They are called internal and external (in relation to the bladder).

Hypoxia-->pCO2 increase-->chemoreceptors are stimulated-->VMC stimulated-->trachyarrythmia

They are controlled by the autonomic nervous system.

Impulses from the brain go mostly through the channels in the spinal cord and control most everything that goes on in the body. It is a two way street with information generated chemicals being carried throughout the body.The brain uses neurons to decide what information is acted upon.

Involuntary muscles contract subconsciously.

Mitochondria supply the cell with ATP (Adenosine Triphosphate), which is the energy the cell needs.

A heart cell is a type of muscle cell which needs plenty of energy to contract and keep functioning. This is why a heart cell needs more mitochondria than other cells- because they need more energy.

It's called - the diaphragm (pronounced di-a-fram)

Shoulder adductors. Abduction means moving away from the median plane of the body and adduction means moving towards the median plane of the body.

Cardiac muscle is similar to smooth muscle in that both are involuntary. Cardiac muscle is similar to skeletal muscle because they are both striated.

Fixator

Voluntary (or skeletal) muscle cells, involuntary (or smooth) muscle cells, and cardiac (or heart) muscle cells, all have thick and thin filaments (myosin and actin, respectively), for their sliding filament mechanism, enabling movements However, since their funscions are different, there are significiant differences in their structures: shapes, sizes, proportion of filaments, their response to stimulus, and the kind of stimulus itself, for example.

Inserts on the dorsum of the fifth metatarsal. When it contracts it dorsiflexes and everts the foot

Yes, MRI is the best imaging modality to see a torn quadriceps muscle. MRI's ability to differentiate between bone, muscle, nerve, and vasculature makes it the imaging modality of choice for torn muscles. Both the quadriceps muscle and tendon can be easily seen with an MRI scan.

That is correct.

Muscles cells can undergo mitosis, but almost all nerve cells will not. This is true within the body and even when isolated and put into culture.

is the strongest muscle in your body, and most flexible. Is the only muscle with taste sensors. A human has more bacterias in the mouth than a dog. Saliva has a PH of 8. Not everybody can roll their tongue. Tongue kisses last longest. ;)

It is called the threshold voltage and is around -70 mvolts.

Most commonly, feeling a pain behind the knee is related directly to the Popliteus muscle. The Popliteus muscle is a very small muscle located behind the knee and should be checked by a doctor.

medial deltoids

The two main muscles of the arm are known as the bicep and triceps. When the lower arm is raised from resting position, the bicep contracts and feel hard.

The biceps, pectoralis, and trapezius.

it is a problem in the nervous system