1.4 Muscle and Nerve Tissue

Question 1

Muscle cell membrane

Answer 1

Sarcolemma

Question 2

Cytoplasm of muscle cells

Answer 2

Sacroplasm

Question 3

Smooth ER of muscle cells

Answer 3

Sarcoplasmic reticulum

Question 4

Specialized mitochodria of muscle cells

Answer 4

Sarcosome

Question 5

Functional unit of muscle fibers

Answer 5

Sarcomere

Question 6

Type of muscle with cylindrical and multinucleated cells, with oval nuclei at the periphery of cell

Answer 6

Skeletal muscle

Question 7

Dark areas in the center of sarcomeres; anisotropic; consists of thick filament

Answer 7

A band

Question 8

Light areas on either side of the Z disc

Answer 8

Isotropic

Question 9

Part the skeletal muscle fiber: Pale area; center of A band

Answer 9

H band

Question 10

Part the skeletal muscle fiber: Center of adjacent sarcomere; bisects each I band in which the thin filaments are attached to

Answer 10

Z line/disk

Question 11

Contains binding site for myosin; makes up thin filaments

Answer 11

Actin

Question 12

Morphological changes in sarcomere during muscle contraction

Answer 12

I band is narrower
H band is extinguished
Z discs move closer together
A band is unaltered

Question 13

Receptor of proprioception

Answer 13

Neuromuscular spindle

Question 14

Responsible for the packaging of neurotransmitter substances

Answer 14

Golgi complex

Question 15

Unique in preneuronal multiplying cells

Answer 15

Centriole

Question 16

Found only in the soma; with multople parallel arrays of smooth cisternae

Answer 16

Golgi complex

Question 17

Most abundant in axon terminal

Answer 17

Mitochondria

Question 18

Protein used in anterograde transmission

Answer 18

Kinesin

Question 19

Protein used in retrograde transmission

Answer 19

Dynein

Question 20

Serves as a high-resustance low -capacitance insulator

Answer 20

Mylein sheath

Question 21

Responsible for myelination in the periphery

Answer 21

Schwann cells

Question 22

Responsible for myelination in the CNS

Answer 22

Oligodendrocyts

Question 23

Sensory receptor for touch, heat, and cold sensation; no connective tissue; high amount in the body

Answer 23

Free / non-encapsulated

Question 24

Sensory receptor for pressure, vibration; concentric layer of lamellae

Answer 24

Encapsulated sensory receptor

Question 25

Specific sensory receptor for touch located in dermal papillae

Answer 25

Meissner’s corpuscle

Question 26

Specific sensory receptor for proprioception

Answer 26

Neuromuscular spondle

Question 27

Deter pressure changes

Answer 27

Baroreceptors

Question 28

Largest and most numerous neuroglial cells; star-shaped

Answer 28

Astrocytes

Question 29

Many and short branching astrocytes found in gray matter

Answer 29

Protoplasmic astrocytes

Question 30

Few, long and unbranched astrocytes in white matter

Answer 30

Fibrous astrocytes

Question 31

Small cell with short processes; phagocytic in nature involved in inflammation and repair in the adult CNS; produce and release neutral proteases and oxidative radicals
Phagocytose injured cells

Answer 31

Microglia

Question 32

Part of skeletal muscle fiber: isotropic, consists of thin filament, seen as light areas on either side of the Z line

Answer 32

I band

Question 33

Muscle protein making up the thick filaments; made up of 2 heavy and 2 light chains

Answer 33

Myosin

Question 34

Muscle protein which facilitates the actin-myosin interaction during muscle contraction

Answer 34

Troponin

Question 35

Muscle protein which covers the myosin binding site when muscle tissue is at rest

Answer 35

Tropomyosin