Several of the senses work by means of:

a. the brain distributing portions of its processing to the spinal cord.

b. the brain analyzing the pattern of input from many sensory receptors.

c. the brain receiving messages from sensory receptors and then sending messages back to them.

d. sensory receptors communicating first with each other, then with the brain.

e. sensory receptors responding to light.

Muscle cells are referred to as muscle _______ because of their unusual _______.

Muscle contraction works through the process of a ______ of two kinds of muscle filaments past each other within a muscle unit known as a______.

In this process, relatively thick _______ filaments pull relatively thin _______ filaments toward the center of the _______.

The three elements of the skeletal system are_______, _______, and _______.

Name two functions of bone other than support.

The primary component of the integumentary system is an organ called ________, which is composed of two primary layers, an outer layer called the ________ and an inner layer called the

Fat exists in the human body in two primary locations. First there is subcutaneous fat, which can be thought of as a layer of fat located _______; second there is visceral fat, which is fat that surrounds _______ deep within the _______.

Each hair that we have grows out of a tissue complex called a _______.

Going from least inclusive to most inclusive, how would the following levels of organization be ordered in a human being: organ system, cell, tissue, organ?

What are the four basic tissue types in a human being?