Problemas
2. Describe how the muscles in your upper arm work together to bend and straighten your lower arm. 3. How do volunt and involuntary muscles differ? Giv
Roztwór
Cecilia
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Respuesta
2. The biceps and triceps muscles in the upper arm work together to allow the bending and straightening of the lower arm. The biceps muscle flexes the elbow, causing the lower arm to bend, while the triceps muscle extends the elbow, causing the lower arm to straighten.3. Voluntary muscles are those that we can control consciously and are attached to the bones, responsible for all locomotor activities. Involuntary muscles are those that we cannot control consciously and are found in the internal organs such as the heart, stomach, intestines, and blood vessels.
Explicación
## Step 1The muscles in the upper arm, specifically the biceps and triceps allow the bending and straightening of the lower arm. The biceps muscle is located on the front part of the upper arm and is responsible for flexing the elbow, which is the action of bending the lower arm. When the biceps contracts, it pulls the forearm towards the shoulder, causing the elbow to bend.## Step 2On the other hand, the triceps muscle is located on the back part of the upper arm and is responsible for extending the elbow, which is the action of straightening the lower arm. When the triceps contracts, it pushes the forearm away from the shoulder, causing the elbow to straighten.## Step 3Voluntary muscles are those that we can control consciously. These muscles are attached to the bones and are responsible for all locomotor activities. They are under our conscious control, meaning we can decide when to move them.## Step 4Involuntary muscles, on the other cannot control consciously. These muscles are found in the internal organs such as the heart, stomach, intestines, and blood vessels. They are controlled by the autonomic nervous system, which operates without our conscious control.