The erector spinae iliocostalis muscles are considered to be agonist muscles during extension of the spine.

What important molecules are required components in coenzymes?

Cnidarians are aquatic and radially symmetric, with 2 germ layers.

The femoral condyles articulate with the fibular condyles during flexion of the knee.

Lampreys are extinct species

In performing lateral flexion against gravity such as in a lateral sit-up, which of the following muscles would be least effective?

Where is the respiratory center located in the brain?

Which of the following muscles is not strengthened to any substantial degree by sit-ups?

Positioning the forearm in pronation decreases the effectiveness of the biceps brachii muscle. In flexing the elbow.

Sit-ups are an excellent exercise for strengthening the erector spinae muscles.