Exam 23: Protection, support, and Movement

The capacity to receive and respond to a stimulus is referred to as

The thick filaments of vertebrate skeletal muscle are made of

What is the membrane of a muscle fiber known as?

What replaces the notochord in most vertebrates?

In the epidermis of hagfishes are __________,which produce large amounts of mucus that cover the body surface.

The thick protein coat outside the plasma membrane of Paramecium is the

Animals secrete __________ which serve to communicate with other members of the same species to elicit certain behavioral responses.

The filaments of vertebrate skeletal muscle that myosin binds to are

Upon being released from the sarcoplasmic reticulum,Ca²⁺ ions bind to the protein __________.

The outer layer of the mammalian epidermis is made up of keratinized cells and is called the

A rigid exoskeleton is characteristic of

In bony fishes,growth lines in the scales are often useful in determining the __________ of the fish.

The vertebrate skeleton became noticeably strengthened as vertebrates moved

A(n)__________ is composed of a core of liquid surrounded by a tension-resistant sheath containing muscles.

In cartilaginous fishes,the dermis contains bone in the form of small placoid scales called

Most multicellular animals have an integument consisting of a single layer of cells,the

What is the main component of the arthropod cuticle?

Which of the following is NOT a function of vertebrate skin?

Ultraviolet rays convert a chemical in the skin into

In the structure of bone,the minute chambers that house the bone cells are called