Question

QUESTION 1 Endocrine glands secrete saliva. C hormones sweat. digestive enzymes. All of the choices are correct. QUESTION 2 Cerumen is a secretion that o acts as a pheremone. lubricates vellus hairs and waterproofs the skin of the limbs. C lubricates the ear canal and traps debris before it reaches the eardrum. tends to cause acne on the skin of the face. cools the body through water evaporation. If you were examining a microscope slide containing a type of muscle tissue and observed a branching network of strated cells, each with one or two central nuclei, you could conclude that you were looking at - muscle. cardiac osseous skeletal voluntary smooth 1. QUESTION 4 A skeletal muscle fiber is a collection of several muscles bound together by a membrane. an elongated series of muscles held together by dense connective tissue. a contractile filament within the osteon of bone. found only in cardiac muscle. a skeletal muscle cell. QUESTION 5 1. The function of melanin in the skin is to keep the epidermis soft and pliable. prevent infections. o protect against UV light help regulate body temperature. reduce water loss. QUESTION 6

Answer 1

1. Endocrine gland secretes hormones. These are ductless glands so they directly secrete into blood. Exocrine glands secrete saliva, sweat and enzymes, like secreted as in pancreas.

2. Cerumen is a secretion that lubricates the ear canal and traps debris before it reaches the eardrum. Earwax which consists of hair, dead skin cells and is secreted by ceruminous gland.

3. Cardiac muscle - Branched, single centrally located nucleus, striated. Others two are unbranched. Smooth muscles are non striated.

4. A skeletal muscle fiber is a skeletal muscle cell. A skeletal muscle is made up of thousands of muscle fibers.

5. The function of melanin in the skin is to protect against UV light.

Answer 2

ANSWERS :

1. harmones.

2. lubricates the ear canal and traps debris before it reaches the ear drum.

3. cardiac.

4. a skeletal muscle cell.

5. protect from UV light.