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BLG 101 Chapter 9 Muscle Exam questions and answers 100% correct
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BLG 101 Chapter 9 Muscle Exam
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BLG 101 Chapter 9 Muscle & MuscleTissue
Where is skeletal muscle found - answerbones & skin
where is cardiac muscle found - answerwalls of the heart
where is a smooth muscle found - answerin walls of hollow visceral organs (except
heart)
what are the 4 main characteristics of all three muscle tissue - answer1. Excitability
2. contractility
3. extensibility
4. elasticity
explain excitability in muscle tissue - answer(Responsibility) ability to receive and
respond to stimuli
explain contractility in muscle tissue - answerability it shorten forcibly when stimulated
explain extensibility in muscle tissue - answerability to be stretched
elasticity in muscle tissue - answerability to recoil to resting length
what are the 4 muscle functions - answer1. produce movement
2. maintain posture and body position
3. stabilize joints
4. generate heat as they contract
3 features of of skeletal muscle - answernerve and blood supply,
connective tissue sheaths, and
attachments
What 3 parts does each muscle receive - answernerve, artery, veins
, 3 types of skeletal muscle connective tissue sheaths - answer1. epimysium
2. perimysium
3. endomysium
What type of tissue is epimysium - answerdense irregular tissue
where is epimysium tissue found? - answerall around the muscle
what type of tissue is perimysium - answerfibrous connective tissue
what does perimysium tissue surround - answerfascicles (groups of muscle fibers)
what type of tissue is endomysium - answerfine areolar connective tissue
what does endomysium tissue surround? - answereach muscle fiber
Does contracting muscle fibres require a large or small amount of nutrients + oxygen? -
answerHUGE AMOUNTS
what part of the brain sends out motor neurons to control skeletal muscle? -
answermotor cortex
What is the cell membrane of skeletal muscle fibers called? - answersarcolemma
do skeletal muscle fibers contain one or multiple nuclei - answermultiple
what is sarcoplasm - answermuscle fiber cytoplasm
what 2 things are there a lot of in muscle cells? - answerglycosomes & myoglobin
What do glycosomes store? - answerglycogen (glucose)
what does myoglobin store? - answeroxygen
what are myofibrils? - answerdensely packed, rodlike elements consisting of
sarcomeres made up of myofilaments
what are myofilaments made of (2) - answeractin + myosin
how many myofibrils can a single muscle fiber contain? - answerthousands
Why are muscle cells multinucleated? - answerneeds a lot of DNA to make a lot of
protein
for transcription + translation
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