The musculature of squid arms and tentacles: Ultrastructural evidence for functional differences

Journal of Morphology
William M Kier

Abstract

The transverse muscle mass of the arm and the transverse and circular muscle masses of the tentacle of squid (Loligo pealei and Illex illecebrosus) were examined by transmission electron microscopy. Previous work had indicated that although similar in gross arrangement, the transverse muscle mass of the tentacle creates rapid elongation during prey capture while the transverse muscle mass of the arm is involved in creating bending movements. The difference in function between the transverse muscle masses of the arms and tentacles is reflected in differences in ultrastructure. The transverse muscle mass of the arm is made up of regular, obliquely striated muscle fibers 1-6 μm in diameter. The transverse and associated circular muscle masses of the tentacle are made up of cross-striated muscle fibers 1-3 μm in diameter. The cross-striated muscle fibers have A bands approximately 0.5 μm (I. illecebrosus) and 0.9 μm (L. pealei) in length and a resting sarcomere length of 0.9 μm (I. illecebrosus) and 1.6 μm (L. pealei), suggesting a relatively high shortening speed for this muscle type. The cross-striated cells are not divided up into myofibrils, and the sarcoplasmic reticulum is located beneath the sarcolemma. Vernier displacements...Continue Reading

References

Jan 1, 1977·International Review of Cytology·G Lanzavecchia
Mar 1, 1979·The Journal of Cell Biology·S S Jahromi, M P Charlton
May 25, 1976·Journal of Molecular Biology·B M MillmanP M Bennett
Oct 1, 1976·The Journal of Cell Biology·R J LevineB Walcott
Oct 1, 1975·The Journal of Experimental Zoology·R K Josephson
Nov 1, 1974·Journal of Ultrastructure Research·C M Morrison, P H Odense
Jan 1, 1972·Physiological Reviews·R I Close
Dec 1, 1971·The Journal of Cell Biology·R W Rowe
May 1, 1969·American Zoologist·E Florey
Jan 1, 1971·Zeitschrift für Zellforschung und mikroskopische Anatomie·J W Sanger
Apr 1, 1968·Animal Behaviour·J B Messenger
Jan 1, 1968·Zeitschrift für Zellforschung und mikroskopische Anatomie·R A Cloney, E Florey
Jul 1, 1967·The Journal of Cell Biology·J Rosenbluth
Dec 1, 1981·The Journal of Cell Biology·C Franzini-Armstrong, L D Peachey
Aug 1, 1981·Journal of Ultrastructure Research·M G Nunzi, C Franzini Armstrong
Nov 2, 1957·Nature·J HANSON, J LOWY
Feb 1, 1962·The Journal of Physiology·J LOWY, B M MILLMAN
May 1, 1981·Proceedings of the National Academy of Sciences of the United States of America·T P MommsenP W Hochachka

❮ Previous
Next ❯

Citations

Jul 29, 2008·Journal of Speech, Language, and Hearing Research : JSLHR·Nadine P ConnorGlen Leverson
Jun 24, 2008·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Sandra NavetLaure Bonnaud
Apr 7, 2004·Development, Growth & Differentiation·Annalisa GrimaldiMagda De Eguileor
Jan 5, 2014·Invertebrate Neuroscience : in·Graziano FioritoPaul Andrews
Mar 1, 2016·Frontiers in Cell and Developmental Biology·William M Kier
Jun 9, 2015·EvoDevo·Marie-Therese NödlLetizia Zullo
Mar 22, 2016·Invertebrate Biology : a Quarterly Journal of the American Microscopical Society and the Division of Invertebrate Zoology/ASZ·Justin F Shaffer, William M Kier
Mar 11, 2000·Journal of Neurophysiology·H MatznerB Hochner
Jun 21, 2011·Journal of Morphology·Janek von ByernNorbert Cyran
May 31, 2017·Frontiers in Cell and Developmental Biology·Letizia ZulloMarie-Therese Nödl
Jun 7, 2018·Integrative and Comparative Biology·Kari R Taylor-BurtJoseph T Thompson
Feb 23, 2018·Bioinspiration & Biomimetics·Gaurav SinghGirish Krishnan
Mar 29, 2014·The Journal of Experimental Biology·Joseph T ThompsonWilliam M Kier
Oct 28, 2011·The Journal of Experimental Biology·Laura MargheriGraziano Fiorito
Feb 16, 2010·The Journal of Experimental Biology·S Michael SalisburyJoseph R Schulz
Mar 17, 2010·The Journal of Experimental Biology·J T ThompsonP S Krueger
Jan 21, 2006·The Journal of Experimental Biology·Joseph T Thompson, William M Kier
Jan 1, 2008·The Journal of Experimental Biology·William M Kier, Frederick H Schachat
Jun 1, 2010·The Journal of Experimental Biology·William J StewartPaul S Krueger
May 13, 2021·Advanced Science·Liang ZhouLuquan Ren

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.