HISTO LEC PART 2 midterms

54問 • 1年前

Yami

通報

問題一覧

Skeletal muscles cells arranged into bundles called ____ surrounded by thin layers of connective tissue

Fascicles

Skeletal muscle location

Near bones

Skeletal muscle cell diameter

Largest

Skeletal muscle T tubules

A-I bands, forms triads

Cardiac muscle location

Heart wall

Cardiac muscle T tubules

Z lines, forms diads

Smooth muscle location

Walls of hollow organs and blood vessels

Involuntary and striated; quick, strong, and rhythmic contraction

Cardiac muscle

Voluntary and striated, quick and strong contraction

Skeletal muscle

Cells overlap; can synthesize collagen and elastin

Smooth muscle

Where do skeletal muscle come from?

Mesenchymal cells

Spindle-shaped; fused to for multiucleated myotubes which elongate

Myoblasts

Contains a ton of mitochondria, glycogen granules, and myoglobin

Sarcoplasm

What's inside the actual skeletal muscle?

Fascicles

Each fascicle is composed of

Muscle cells

Each muscle cell contains

Myofibrils

Delicate connective tissue that surrounds each muscle cell

Endomysium

Connective tissue that surrounds each fascicle

Perimysium

Dense layer of connective tissue that surrounds entire muscle

Epimysium

Basic functional unit of a muscle

Sarcomeres

Composed of repeating sections of sarcomeres

Myofibrils

Composed of long fibrous proteins that slide past each other when the muscles contract and relax

Sarcomeres

Thick filament

Myosin

Thin filament

Actin

Myosin can only bind to actin when binding sites are exposed to

Ca ions

Bound to Z lines which forms the borders of sacromeres

Actin molecules

Give skeletal and cardiac muscles their striated appearance

Sarcomeres

When muscle contract, sarcomeres

Shorten

Composed of thick filaments overlapping thin filaments

A bands

Are in the center of A bands. Lies between the free ends of the thin filaments and contain only myosin filaments

H bands

Bisect H bands, they are where adjacent think filaments connect

M lines

Contain only thin filaments

I bands

Bisect I bands, alpha actinin attaches actin filaments to the Z line

Z lines

Smooth endoplasmic reticulum in muscle cells

Sarcoplasmic reticulum

Specialized to sequester and release calcium ions, and it surrounds each myofibril

Sarcoplasmic reticulum

A tubular invagination of the sarcolema

Transverse tubule

Expansion of the sarcoplamic reticulum

Terminal cisterna

Glues adjacent cells together

Intercalated disks

Complexes of several types of cell-cell junctions

Intercalated disks

Anchor actin filaments

Fascia adherens

Prevent cardiac muscle from tearing apart during contraction

Macula adherens

Allow electrical stimuli to be passed from cell to cell

Gap junctions

Anchor sites for actin-myosin filament bundles

Dense bodies

Has no regenerative ability

Cardiac muscle

Can undergo limited regeneration

Skeletal muscle

Capable of active regeneration

Smooth muscle

Inactive myoblasts that become activated and proliferate and fuse after injury

Satellite cells

Encolsed by a cell/pasma membrane and has central nucleus

Cell body

Granules found in the cytoplasm of the cell body

Nissl bodies

Extremely fine fibers within the cell body from the dendrite to the axon

Neurofibrils

Whitish, non cellular fatty layer that surrounds the axon

Myelin sheath

Cellular layer outside of the myelin sheath

Neurilemma

Myelin sheat together with the neurilemma

Medullary sheath

Interrupted intervals along the medullary sheath

Nodes of ranvier

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ANIMAL REPRODUCTION

31問 • 2年前

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40問 • 2年前

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Poultry lab external anatomy and reproductive system

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poultry lab finals

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ANAT101A - Introduction to Veterinary Anatomy

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19問 • 1年前

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38問 • 1年前

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BASC108A 2

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DEVA100B

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DEVA100A

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BASC101B Finals

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Yami · 41問 · 1年前

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OSTEOLOGY

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MICRO LEC

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PHYSIO LEC

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問題一覧

Skeletal muscles cells arranged into bundles called ____ surrounded by thin layers of connective tissue

Fascicles

Skeletal muscle location

Near bones

Skeletal muscle cell diameter

Largest

Skeletal muscle T tubules

A-I bands, forms triads

Cardiac muscle location

Heart wall

Cardiac muscle T tubules

Z lines, forms diads

Smooth muscle location

Walls of hollow organs and blood vessels

Involuntary and striated; quick, strong, and rhythmic contraction

Cardiac muscle

Voluntary and striated, quick and strong contraction

Skeletal muscle

Cells overlap; can synthesize collagen and elastin

Smooth muscle

Where do skeletal muscle come from?

Mesenchymal cells

Spindle-shaped; fused to for multiucleated myotubes which elongate

Myoblasts

Contains a ton of mitochondria, glycogen granules, and myoglobin

Sarcoplasm

What's inside the actual skeletal muscle?

Fascicles

Each fascicle is composed of

Muscle cells

Each muscle cell contains

Myofibrils

Delicate connective tissue that surrounds each muscle cell

Endomysium

Connective tissue that surrounds each fascicle

Perimysium

Dense layer of connective tissue that surrounds entire muscle

Epimysium

Basic functional unit of a muscle

Sarcomeres

Composed of repeating sections of sarcomeres

Myofibrils

Composed of long fibrous proteins that slide past each other when the muscles contract and relax

Sarcomeres

Thick filament

Myosin

Thin filament

Actin

Myosin can only bind to actin when binding sites are exposed to

Ca ions

Bound to Z lines which forms the borders of sacromeres

Actin molecules

Give skeletal and cardiac muscles their striated appearance

Sarcomeres

When muscle contract, sarcomeres

Shorten

Composed of thick filaments overlapping thin filaments

A bands

Are in the center of A bands. Lies between the free ends of the thin filaments and contain only myosin filaments

H bands

Bisect H bands, they are where adjacent think filaments connect

M lines

Contain only thin filaments

I bands

Bisect I bands, alpha actinin attaches actin filaments to the Z line

Z lines

Smooth endoplasmic reticulum in muscle cells

Sarcoplasmic reticulum

Specialized to sequester and release calcium ions, and it surrounds each myofibril

Sarcoplasmic reticulum

A tubular invagination of the sarcolema

Transverse tubule

Expansion of the sarcoplamic reticulum

Terminal cisterna

Glues adjacent cells together

Intercalated disks

Complexes of several types of cell-cell junctions

Intercalated disks

Anchor actin filaments

Fascia adherens

Prevent cardiac muscle from tearing apart during contraction

Macula adherens

Allow electrical stimuli to be passed from cell to cell

Gap junctions

Anchor sites for actin-myosin filament bundles

Dense bodies

Has no regenerative ability

Cardiac muscle

Can undergo limited regeneration

Skeletal muscle

Capable of active regeneration

Smooth muscle

Inactive myoblasts that become activated and proliferate and fuse after injury

Satellite cells

Encolsed by a cell/pasma membrane and has central nucleus

Cell body

Granules found in the cytoplasm of the cell body

Nissl bodies

Extremely fine fibers within the cell body from the dendrite to the axon

Neurofibrils

Whitish, non cellular fatty layer that surrounds the axon

Myelin sheath

Cellular layer outside of the myelin sheath

Neurilemma

Myelin sheat together with the neurilemma

Medullary sheath

Interrupted intervals along the medullary sheath

Nodes of ranvier