<span>Sodium channels close when not occupied
</span><span>Sodium ions diffuse through and enter the cell.
</span>
Then they leave the cell.
The sodium diverts in the cell layer have receptor locales for acetylcholine.
Answer:
Excitement
Explanation:
Sympathetic nervous system is a type of autonomic nervous system that acts as an emergency system of the body.
Sympathetic nervous system prepares the body during fight and flight response. The energy is put out in this system and protects the body from the injury. During excitement the heart speeds up, blood pressure increases and more energy is available to the body. Hence, excitement is the characteristic of sympathetic division of nervous system.
Thus, the correct answer is option (b).
Nature not sure how to explain so sorry
<span><u>thoracic region,</u>
<u>back,</u>
<u>abdominal region,</u>
<u>legs</u>
<u>and the arms</u>
</span>Skeletal muscle is attached to bones or other body parts by fibrous CONNECTIVE tissue.
<span>This fibrous connective tissue is called tendons. Tendon or sinew connects the muscle to bone and is capable of withstanding tension. </span>
<span>Tendons are similar to ligament and fasciae; They all are made up of collagen. Ligaments join one bone to another bone, while fasciae join one muscle to other muscles.</span>
