Deck 4: Muscle Tissue

Question 1

In skeletal muscle,which protein is PRESENT in the I-band but ABSENT from the H-band?

A) Actin
B) Creatine kinase
C) Desmin
D) Myosin
E) Titin

Answer 1

A

Question 2

Cardiac muscle can be distinguished from skeletal muscle because cardiac muscle:

A) Forms muscle fibers with larger diameters than those of skeletal muscle
B) Has 15 to 20 nuclei per muscle fiber (cell)
C) Lacks intercalated disks
D) Lacks striations
E) Possesses a nucleus located in the center of each muscle fiber

Answer 2

E

Question 3

The function of the protein,dystrophin,is to:

A) Anchor actin filaments to the plasma membrane
B) Conduct an action potential to the sarcoplasmic reticulum
C) Form regular arrays of actin filaments within the I-band
D) Regulate the binding of myosin to actin
E) Transport calcium into t-tubules

Answer 3

A

Question 4

The dense bodies found in smooth muscle cells are functionally and anatomically analogous to which structure found in skeletal muscle cells?

A) A-band
B) Intercalated disks
C) Mitochondria
D) Sarcoplasmic reticulum
E) Z-line

Question 5

Nervous stimulation of skeletal muscle results in a wave of depolarization along the plasma membrane.This electrical signal is carried into the interior of the muscle cell via the membranes of the:

A) Intercalated disks
B) Nuclear envelope
C) Sarcomere
D) Sarcoplasmic reticulum
E) T-tubules

Question 6

The stem cells of muscle,which multiply and differentiate into muscle fibers to repair damaged muscle,are called:

A) Intercalated cells
B) Myoepithelial cells
C) Pericytes
D) Satellite cells
E) Schwann cells