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Feathers and hair consist mainly of_______ .
a. chitin c. keratin
b. cartilage d. collagen
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- According to the video “The Biology of Skin Color”, why do humans need calcium? A. To build strong and large brains. B. To build strong bones and have a healthy immune system. C. To help us digest dairy. D. Humans don't need calcium.A man is was born with a mutation in one of the collagen genes. Which of the tissues would be affected by a deficiency in collagen?Muscles are made of a) Silica b) Polyesters threads c) Calcium and phosphorous d) Groups of cells called Fibers
- Blood cells develop from stem cells in_____ . a. epidermis c. cartilage b. dermis d. boneWhich is FALSE about integuments? A. Turtles have epidermal scales over the top of their shells B. Amphibians do gas exchange through their skin C. Reptile scales form a continuous water tight sheath D. The main function of fish slime is to keep salt from entering their bodies E. Bony Fish have a layer of epidermis over the top of their scalesGlands are derived from a.nerve tissue. b.connective tissue. c.muscle tissue. d.epithelial tissue.
- Fill in the blanks: a. The nose is _______ to the mouth. b. The ankle is _______ to the knee. c. The ring finger is _______ to the index finger. d. The skin is _______ to the bone. e. The trachea is _______ to the spine. f. The shoulder is _______ to the wristWhat is one important function of melanin? A. Causes the skin to become cooler B. Absorbs harmful radiation C. Strengthens the skin or eyes D. Resets the diurnal biological clock E. Increases the amount of blood vesselsCooking likely led to which of the following changes? a. more robust cranium and chewing musculature b. smaller jaws and thinner tooth enamel c. thicker tooth enamel to protect from tooth decay d. smaller brain and larger gut
- Our skin contains melanocytes, which produce melanin that protects the cells from sun damage. If darker- skinned people have more melanin does this mean that they do not have to protect their skin from the sun? Explain your answer.According to the video “The Biology of Skin Color”, what is the pigment in our skin that reflects or absorbs light? A. Magnesium B. Melatonin C. Melanin D. ChlorophyllStraps of dense, regular connective tissue______ . a. connect muscles to bones c. underlie the skin b. produce blood cells d. lack fibroblasts
