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QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
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Which muscle type is involuntary and striated?
A. Skeletal
B. Cardiac
C. Smooth
D. Tendon
Answer: B. Cardiac
Rationale: Cardiac muscle is striated because it contains organized
sarcomeres, but its activity is involuntary and regulated by intrinsic
pacemaker activity and autonomic input.
Which muscle type is involuntary and non-striated?
A. Cardiac
B. Skeletal
C. Smooth
D. Tendon
Answer: C. Smooth
,Rationale: Smooth muscle lacks the visible sarcomere organization of
skeletal and cardiac muscle and is generally controlled involuntarily.
Which structure is responsible for initiating contraction in smooth
muscle in many visceral organs?
A. Autonomic nervous system and local regulatory mechanisms
B. Somatic motor neuron only
C. Tendon
D. Neuromuscular junction identical to skeletal muscle
Answer: A. Autonomic nervous system and local regulatory
mechanisms
Rationale: Smooth muscle can be regulated by autonomic nerves,
hormones, local chemical signals, stretch, and intrinsic pacemaker
activity depending on the tissue.
Which tissue type has cells embedded in an extracellular matrix and
generally provides structural support?
A. Connective tissue
B. Nervous tissue
C. Epithelial tissue
D. Muscle tissue
Answer: A. Connective tissue
,Rationale: Connective tissue is characterized by cells distributed within
an extracellular matrix containing fibers and ground substance. It
supports, connects, protects, and stores energy.
Which type of connective tissue forms tendons?
A. Dense regular connective tissue
B. Areolar connective tissue
C. Adipose tissue
D. Reticular tissue
Answer: A. Dense regular connective tissue
Rationale: Tendons contain parallel collagen fibers arranged to resist
tension primarily along one axis.
Which type of connective tissue forms much of the dermis?
A. Dense irregular connective tissue
B. Simple squamous epithelium
C. Adipose tissue only
D. Hyaline cartilage
Answer: A. Dense irregular connective tissue
Rationale: Dense irregular connective tissue in the dermis contains
collagen fibers arranged in multiple directions, helping resist stress
from different orientations.
, Which type of cartilage provides smooth surfaces at many synovial
joints?
A. Hyaline cartilage
B. Elastic cartilage
C. Fibrocartilage
D. Dense regular connective tissue
Answer: A. Hyaline cartilage
Rationale: Articular cartilage is a specialized form of hyaline cartilage
that covers the ends of bones within many synovial joints and reduces
friction while distributing loads.
Which bone type contains numerous trabeculae?
A. Spongy bone
B. Compact bone only
C. Dense regular connective tissue
D. Periosteum
Answer: A. Spongy bone
Rationale: Spongy bone consists of a lattice of trabeculae surrounding
spaces that may contain red or yellow marrow.
Which structure contains concentric layers called lamellae?
A. Osteon
B. Sarcomere