BIO 348 - Lecture Exam #2 Questions With Complete Solutions
16 views 0 purchase
Course
BIO 348
Institution
BIO 348
4 functional properties of all muscle tissues correct answer: contractility, excitability, extensibility, elasticity
Contractility correct answer: ability to shorten forcibly when stimulated
what is responsible for contractility correct answer: actin and myosin
excitability correct answ...
BIO 348 - Lecture Exam #2 Questions With
Complete Solutions
4 functional properties of all muscle tissues correct answer: contractility, excitability, extensibility, elasticity
Contractility correct answer: ability to shorten forcibly when stimulated
what is responsible for contractility correct answer: actin and myosin
excitability correct answer: nerve signals or other stimuli excite muscle cells by causing electrical impulses
extensibility correct answer: muscle cells can be stretched or lengthened
when does extensibility occur correct answer: when the opposing muscle is contracting
elasticity correct answer: muscle tissues recoiling passively and resuming resting length
skeletal muscle tissue (microscopic anatomy) correct answer: attaches to skeleton, striated with muscle fibers, voluntary contraction cardiac muscle tissue (microscopic anatomy) correct answer: only occurs in walls of the heart (visceral organ), striated, involuntary contraction
smooth muscle tissue (microscopic anatomy) correct answer: found in the walls of the hollow internal organs(visceral organ), no striations, involuntary contraction
how does skeletal muscle produce movement correct answer: attaches to skeleton and moves by moving bones
how do visceral organs produce movement correct answer: contract and release to move fluid and substances through hollow organs
what kind of muscles open and close body passages, how? correct answer: sphincter muscles, encircle openings, contract to restrict, relax to allow passage
how do skeletal muscles and muscle tone maintain posture and stabilize joints correct answer: contract continuously
how do muscles produce heat correct answer: contraction
what connective tissue surrounds muscles (organ level) correct answer: epimysium
what connective tissue surrounds fascicles correct answer: perimysium what connective tissue surrounds muscle fibers (cell level) correct answer: endomysium
muscles are made up of correct answer: fascicles
fascicles are made up of correct answer: muscle fibers
muscle fibers are made up of correct answer: myofibrils
myofibrils are made up of correct answer: sarcomeres
contractile proteins are correct answer: actin and myosin
sarcomeres are made up of correct answer: actin and myosin filaments
types of myofilaments correct answer: thick and thin
what are thick filaments correct answer: bundled myosin molecules
what are thin filaments correct answer: actin molecules and regulator proteins
what are regulator proteins correct answer: troponin and tropomyosin
epimysium correct answer: connective tissue surrounding entire
muscle perimysium correct answer: Connective tissue surrounding a fascicle
endomysium correct answer: connective tissue surrounding a muscle fiber
in general what are skeletal muscles supplied by correct answer: one nerve, one artery, and one or more veins
how do nerves are vessels supply intramuscular connective tissue correct answer: they branch out through the tissue, with the smallest branches serving individual muscle fibers
contracting muscles have a high demand for ____ and ____ correct answer: nutrients, O2
the basic unit of contraction in skeletal muscle correct answer: sarcomere
troponin correct answer: regulatory protein in thin filaments that spiral around actin molecules
tropomyosin correct answer: regulatory protein that covers myosin-binding sites to prevent actin from binding to myosin
what enzyme do thick filaments contain, and what does it do correct answer: ATPase - splits ATP to release the energy required for muscle contraction
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Classroom. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
