Lab Exam 3: Muscle Tissue

Question 1

muscle tissue

Answer 1

highly specialized to contract and produces most body movement types

Question 2

3 types of muscle tissue

Answer 2

skeletal, cardiac, smooth

Question 3

skeletal muscle

Answer 3

attached to skeleton; under voluntary control, its contraction moves limbs and external body parts

• its cells are long, cylindrical, non branching, multinucleate with nuclei pushed to periphery of cells
• obvious striations

Question 4

cardiac muscle

Answer 4

• heart
• as it contracts the heart pumps propelling the blood into blood vessels
• has striations, branching uninucleate cells that fit at junctions (intercalated discs)
• under involuntary control - cannot consciously control heart

Question 5

smooth muscle

Answer 5

in walls of hollow organs
2 layers
contraction can constrict or dilate the lumen of an organ
NO striations - spindle shaped multinucleate cells
- involuntary control

Question 6

muscle fiber membrane

Answer 6

sarcolemma