Human Anatomy and Physiology Lesson 05 Exam #1

Refer to the illustration. Which of the structures in the diagram are composed mainly of dead cells?

2 and 8

Refer to the illustration. Which joint allows bones to glide over each other?

3

Refer to the illustration. Which of the following structures is used to eliminate wastes and help regulate temperatures?

7

The organs for digestion, excretion, and reproduction are located in the ___________ cavity.

Abdominal

A skin disorder caused by blockage of oil glands is called __________.

Acne

The heart and the blood vessels are separate organs that form the ________.

Cardiovascular System

In a fetus, most bones are originally made of __________.

Cartilage

From the smallest functional units to the largest, the body is organized as follows:

Cells, Tissue, Organ, System, Body

The total amount of force that a muscle exerts _____________.

Depends on the total number of individual muslce fibers that have been stimulated

Hair grows from specialized epidermal structures called __________.

Follicles

Smooth muscle can be found __________.

In internal Organs

The dermis of the skin is ___________.

Involved in tempature regulation

Refer to the illustration. The portion of the skin labeled "1"

Is the dermis

The point at which a muscle is attached to a bone is called the ____________.

Ligament

Refer to the illustration. The material labeled "1," which fills the center and spaces at the ends of bones and produces blood cells, is called _________.

Marrow

Actin and myosin are the two most abundant proteins in _________________.

Muscle Fibers

Tendons connect ___________.

Muscle to Bone

Degeneration of cartilage causes _____________.

Osteoarthritis

Yellow bone marrow _____________________.

Provides an energy reserve

The heart and lungs are protected by the _____________.

Rib cage

The region between Z lines is called the__________.

Sarcomere

An oily skin is caused by the secretion of too much _________.

Sebum

It has been known for a long time that muscle contraction requires ATP. Recently, scientists have discovered that ATP is required in order for the muscle filaments actin and myosin to slide past each other, resulting in muscle contraction. The ATP is specifically required to release the attachments between actin and myosin in the many cycles of attachment, release, and reattachment that result in sliding of these filaments past each other. Which of the following phenomena is explained by this specific role of ATP?

Stiffening of a body after death (rigor mortis)

The thin outer layer of the skin is __________.

The epidermis

The lungs are located in the ___________.

Thoracic Cavity