Upgrade to remove ads
A&P review test 3
Terms in this set (42)
A bundle of muscle fibers
Fascicle are enclosed in tissue called?
The largest organizational muscle structure, the muscle belly is enclosed in?
One of the smallest organizational units of muscle, the muscle fiber, is enclosed in?
actin and myosin
The sliding filament theory of muscle contraction describes the action of two protein filaments called ——&——-
Linked segments form "sub-fibers" called
Can be defined anatomically as one motor neuron and the muscle fibers to which it attaches
A motor unit can be described physiologically by its?
Increased firing frequency & MU recruitment
The firing of a Motor unit is an "all or nothing" phenomenon. Given the truth if that statement, how is it possible to grade the degree of muscle force
Muscles are connected to bones , cartilages, or other muscles by connective tissue called?
The point of attachment which is most stable is called?
The point of attachment which is most moveable is called?
Line of action
The line vector drawn through the origin and insertion points of attachment are the muscles.....?
The external intercostal muscle help us with what phase if respiration?
External intercostal muscles help us with what phase of respiration?
The external intercostal muscles receive their motor supply from?
T2-T12; T7-L1; expiratory
Internal intercostal muscles receive their motor supply from ____ and are agonists to external oblique muscle (interacted by _____) because both serve the ____ phase of respiration.
The first rib and the clack always articulate with that part of the sternum
Bony support for respiratory muscles includes two "girdles". The rostral girlde is called the _____ girdle, and is compromised of two bones (on each side)
The central bone is the?
The dorsal bone is the?
Bony support for respiratory muscles includes two "girdles". The most caudal girdle is called the _____ girdle, and is compromised of two bones (on each side
The small hook of the bone which descends from the larger bone is called?
The large fan shaped bone is called?
Boyle's law equation
For gas in a closed container, volume and pressure are inversely related and have a constant priduct
In simple words describe Boyle's law
If an undergraduate woman admires her beau's "six pack" the specific muscle under discussion is the?
The rectus abdominis aids with what stage of the respiratory cycle?
Internal obliques abdominis; external oblique abdominis, transverse abdomis
Located laterally to this midline muscle is a set of three layered ventral-abdominal muscles. In order from the most superficial to the deepest these three muscles are......
Laterally and caudally; an increase in thoracic volume
Some vertebral processes are important sites of attachment for the serratus posterior superior (sps) And costal elevators (ce) Whose fibers generally run______ (use direction terms) and whose contractions, either separately or together, might cause________________
It is for this reason that we say bees two groups of muscles are potentially______ (use terms relating to respiratory task) . A group of muscles mechanically antagonistic to the SPS and CE muscles
Laterally and rostrally; expiratory
The Serratus posterior inferior muscles, have fibers that run _____ (as above, use direction terms ),and their contractions are there for potentially____ ( again, use the term relating to respiration.) note: muscles that are antagonistic to one another have lines of action, and mechanical effects, that at least partly oppose one another
Thorax and abdomen
The trunk is typically subdivided into two units, The ____ & ______, His contributions to respiration may be partly independent. These units share a common movable wall
The thorax and abdomen share a common, movable wall called the _____ this wall is dumb like
Phrenic; with fibers from C3-c5
The diaphragm is partly composed of a sheet of muscle supplied by the ______ nerve
Central tendons; caudally; increase; lower than the atmosphere
Contraction of the diaphragm will move its rostral most insertion, the _____, ______ (a direction term) causing the volume of the trunk unit above the wall to _____, and air to flow into the lungs. If the thorax were sealed when this muscle contract it so that the volume change but air could not flow into the lungs to equalize pressure, we would use Boyles law to guess that pressure inside the lungs would then be_____
If you had to pick one secondary ventral thoracic muscle of inspiration well positioned from a mechanical point of you to help lift ribs and expand the thorax which would it be
One attachment on the coracoid process of the scapula and another attachment on the ventral aspect of ribs two through five give this muscle a line of action which is nearly, but not quite, vertical, and would allow it to lift the ribs efficiently trying to lift at an angle is harder than trying to lift directly upward and the more acute the angle the harder it is to lift something
What is it about the positioning of the pectoralis minor that gives it its mechanical advantage?
Serratus anterior, Serratus posterior superior, costal elevators.
Name to other muscles, though there are many more than two, which are agonists to this muscle, and which form part of a redundant system which might accomplish the functional goals of enlarging the thorax
visceral pleura, parietal pleura, pleura linkage
The tissues of the lungs and the thoracic wall do you not have a hard mechanical connection. Instead, they are surrounded by a pair of linings with a negative pressure between them which holds them to gather. The names we give to these linings and the mechanism by which they adhere to each other is
trachea, bronchi, bronchioles, alveoli
A number of structures, mostly to Blake in one way or another, carry air from the atmosphere down into the fine tissue of the lungs where oxygen is exchanged for carbon do you oxide through an interaction with blood vessels. Starting with the opening into the pharynx, in going in order to the smallest structures these would be?
Enables the lungs to expand and contract as the thorax changes volume
Recommended textbook explanations
Essential Cell Biology
Bruce Alberts, Dennis Bray, Karen Hopkin
Kenneth R. Miller, Levine
Principles of Life, BioPortal for Principles of Life (12-month access card), i>clicker2 student remote
David E. Sadava, David M. Hillis, H. Craig Heller, Mary V Price
Elevate Middle Grade Science 2019 Life Student Edition
Sets with similar terms
A&P quiz 3
A&P Quiz 3 & 4
Anatomy - ch. 6 - muscular system
Other sets by this creator
Assessment- Exam 2
Assessment Test 1
Neuronatamy Test 4
Special Topics FINAL