The liquid part of blood is:

Which of these structures contains the substantia nigra?

A muscle always contracts _____. This is known as the all-or-none response.

The deepest of the abdominal muscles is the ________.

If a group of agonists and antagonists contract at the same time, producing the same force at a joint, what movement will occur?

A ______ contains a somatic motor neuron and all of the muscle cells that it innervates.

The layer directly under the skin is called the______.

Which of the following controls appetite and digestive activity?

The head of the humerus articulates with the __________ of the scapula.

When bases of DNA bind to the complementary strand