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Comparison of muscle tissue types. Introduction to the skeletomuscular system and muscular contraction.

Brandon Poe

on 9 November 2015

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Transcript of Musculature

Types of Muscle Tissue
Functions of Muscles
Characteristics of Muscle Tissue
Excitation-Contraction Coupling
Contraction at the Organ Level and the Motor Unit
Energy Production in Muscle Tissue
Skeletal Muscle

Cardiac Muscle

Smooth Muscle

Contains intercalated disks

Not striated
Produce Movement
Maintain Posture
Generate Heat
Storage and movement of substances in organ systems
What kind of muscle tissue is found in the heart?

A) Skeletal muscle
B) Cardiac muscle
C) Smooth muscle
D) Voluntary muscle
Photo source:
Sliding Filament Model of Contraction
McGraw Hill Animation: Sarcomere Shortening
Overview of Contraction
Skeletal Muscle as an Organ
Muscle Fiber Types
The Necessity of Calcium
The Crossbridge Cycle
Moderate Activity:
Oxidative Processes
Peak Acitivity:
Anaerobic Respiration
What is the name of the layer of connective tissue that surrounds the entire muscle?

A) Epimysium
B) Perimysium
C) Myomysium
D) Endomysium
What function of muscle is related directly to the activity of mitochondria?

A) Produce movement
B) Maintain posture
C) Generate heat
D) Storage and movement of substances in organ systems
What characteristic of muscle tissue describes that it is electrically active?

A) Excitability
B) Contractility
C) Extensibility
D) Elasticity
What protein is found only in the dark bands of muscle striations?

A) Myosin
B) Actin
C) Myoglobin
D) Glycogen
Contraction is dependent on the presence of what substance around the myofibril?

A) Acetylcholine
B) Calcium
C) Sodium
D) Oxygen
What is the name of the neurotransmitter at the neuromuscular junction?

A) Myosin
B) Acetylcholine
C) Nicotine
D) Acetylcholinesterase
What couples excitation to contraction in muscles?

A) Myoglobin
B) Acetylcholine
C) Glucose
D) Calcium
What unique organelle in a muscle cell is responsible for the contractile properties of the tissue?

A. Sarcolemma
B. Mitochondrion
C. Myofibril
D. Sarcoplasmic Reticulum
What part of the muscle contains blood vessels and nerves connected to individual muscle fibers?

A) Fascicle
B) Endomysium
C) Periosteum
D) Tendon
What type of tissue is found in a tendon?

A) Skeletal muscle tissue
B) Dense Irregular CT
C) Areolar CT
D) Dense Regular CT
Which phase of the muscle twitch is not dependent on calcium?

A) Latent Period
B) Contraction Period
C) Relaxation Period
The Cross Bridge Cycle
1. Crossbridge formation
2. Power stroke
3. Crossbridge detachment
4. Recovery stroke
Motor Unit
One neuron and all the muscle fibers it controls
Types of Contraction
Isotonic (muscle changes length)
concentric (shorter)
eccentric (longer)
Isometric (literally means "same length")
Resting Muscle:
Building Reserves
C H O + 6O --> 6CO + 6H O
Full transcript