Describe the relationship between the size of a mammal and its gestation time. THE LARGER THE MAMMAL, THE LONGER THE GESTATION TIME Where do marsupials get nourishment from while inside their mother's pouch? THROUGH THE MOTHER'S MILK (MAMMARY GLANDS) What is the general characteristic of all mammals? THEY HAVE HAIR Which era is known as the "Age of Mammals" due to the huge expansion in diversity & numbers? CENOZOIC ERA What is the primary function of hair? INSULATION What is the purpose of the quills on a porcupine's tail? DEFENSE What is the primary purpose of sweat glands? REGULATE BODY TEMPERATURE What are examples of ruminants with stomachs with four chambers? BUFFALO, COW, ELK, ETC. Which group of mammals have young born alive and then immediately move into the mother's pouch to continue development? MARSUPIALS What function do the incisors of carnivores serve? TO TEAR MEAT What is the relationship between the size of a mammal and its average heart rate? THE SMALLER THE MAMMAL, THE FASTER ITS AVERAGE HEART RATE What is the relationship between the amount of melanin in the skin and the protection it has from ultraviolet light? THE MORE MELANIN IN THE SKIN, THE GREATER THE PROTECTION FROM ULTRAVIOLET LIGHT What would happen if the sciatic nerve leading to the muscle on the back of the leg were injured? THE PERSON WOULD BE UNABLE TO WALK Describe first degree burns. INVOLVES ONLY THE EPIDERMIS; REDNESS & SOME SKIN PEELING Describe second degree burns. INVOLVES BOTH THE EPIDERMIS AND DERMIS; MORE SEVERE THAN FIRST DEGREE BURNS Describe third degree burns. MOST SEVERE BURNS; DAMAGE TO EPIDERMIS, DERMIS, NERVES, ETC.; TAKE LONGEST TO HEAL Describe skeletal muscle. FOUND THROUGHOUT THE BODY; VOLUNTARY MUSCLE; STRIATED Describe smooth muscle. FOUND THROUGHOUT THE BODY; INVOLUNTARY MUSCLE; NOT STRIATED Describe cardiac muscle. INVOLUNTARY; FOUND ONLY IN THE HEART; STRIATED Differentiate between the dermis and the epidermis. THE EPIDERMIS IS TYPICALLY AS THICK AS A PIECE OF PAPER & THE DERMIS IS AS MUCH AS 40 TIMES THICKER What is the role of keratin in the epidermis? KERATIN MAKES THE SKIN WATERPROOF Why would someone living near the North Pole have a long healing time for a broken bone? DECREASED EXPOSURE TO THE SUN RESULTS IN LESS VITAMIN D PRODUCED BY THE SKIN Sequence the events that occur when a person gets a cut that bleeds. 1. THE PERSON BLEEDS 2. THE BLOOD CLOTS; A SCAB FORMS 3. WHITE BLOOD CELLS ENTER THE AREA 4. SKIN CELLS DIVIDE 5. NEW SKIN CELLS FILL THE AREA Sequence the events of bone repair. 1. A BLOOD CLOT FORMS WHERE THE BREAK OCCURS 2. CARTILAGE FORMS AT THE BREAK, FOLLOWED BY SPONGY BONE FORMATION. 3. FINALLY COMPACT BONE FILLS THE SPACE What would be the consequence if ossification failed to happen? THE SKELETON WOULD BE MADE OF CARTILAGE