Bio 168 Exam 2 study guide Exam 2026
Questions and Answers
How many lumbar do you have? - Correct answer-5
How can you tell its a lumbar vertabra? - Correct answer-No costal facets, short
spinous process
Four types of bone cells - Correct answer-osteogenic, osteoblasts, osteocytes,
osteoclasts
describe the function of osteogenic cells - Correct answer-only cell that divides,
they differentiate and develop into osteoblasts
describe the function of osteoblasts - Correct answer-cell reproduction for forming
new bone
describe the function of osteocytes - Correct answer-reshapes bones, primary cell
in mature bone
describe the function of osteoclasts - Correct answer-bone respiration, bone
themselves, stores calcium by using lacuna
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, Interosseous membranes are between? - Correct answer-the radius and the ulna
False ribs - Correct answer-8-12 they do not attach directly to sternum (11 and 12
count also)
Floating ribs - Correct answer-11 and 12 because do not connect to sternum
true ribs - Correct answer-1-7
how many total ribs do you have? - Correct answer-12 pairs
Describe the three phases of hair growth - Correct answer-1) Anagen phase-
(longest part) active phase of growth where living cells of the hair bulb are rapidly
growing, dividing, and transforming into hair
2) Catagen phase- (short phase) brief regression period where cell division ceases
and the follicle undergoes involution
3) Telogen phase- (resting phase) hair is shed, 3-4 months hair starts regrowing and
enters the anagen phase
Describe the different types of bone. - Correct answer-Simple fracture, compound
fracture, stress fracture, and pathologic fracture
What's a simple fracture? - Correct answer-broken bone does not penetrate the skin
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Questions and Answers
How many lumbar do you have? - Correct answer-5
How can you tell its a lumbar vertabra? - Correct answer-No costal facets, short
spinous process
Four types of bone cells - Correct answer-osteogenic, osteoblasts, osteocytes,
osteoclasts
describe the function of osteogenic cells - Correct answer-only cell that divides,
they differentiate and develop into osteoblasts
describe the function of osteoblasts - Correct answer-cell reproduction for forming
new bone
describe the function of osteocytes - Correct answer-reshapes bones, primary cell
in mature bone
describe the function of osteoclasts - Correct answer-bone respiration, bone
themselves, stores calcium by using lacuna
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Interosseous membranes are between? - Correct answer-the radius and the ulna
False ribs - Correct answer-8-12 they do not attach directly to sternum (11 and 12
count also)
Floating ribs - Correct answer-11 and 12 because do not connect to sternum
true ribs - Correct answer-1-7
how many total ribs do you have? - Correct answer-12 pairs
Describe the three phases of hair growth - Correct answer-1) Anagen phase-
(longest part) active phase of growth where living cells of the hair bulb are rapidly
growing, dividing, and transforming into hair
2) Catagen phase- (short phase) brief regression period where cell division ceases
and the follicle undergoes involution
3) Telogen phase- (resting phase) hair is shed, 3-4 months hair starts regrowing and
enters the anagen phase
Describe the different types of bone. - Correct answer-Simple fracture, compound
fracture, stress fracture, and pathologic fracture
What's a simple fracture? - Correct answer-broken bone does not penetrate the skin
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
