UNIT#12 SUPPORT AND MOVEMENT Flashcards
It is not a true statement about bones and cartilages:
Both contain various types of living tissues
Which type of cartilage is/are present in our respiratory passage?
Hyaline Cartialge
All of the following are true about collagen except:
➡Inealstic❌
➡Flexible❌
➡Living✅
➡Protein❌
Cartilage is covered by:
Pericondrium
Major protein of connective tissues:
Collagen
Tibia is found in:
Lower Leg
Number of bones present in vertebral column:
33
It is not a part of the axial skeleton:
Patella➡Knee Bone
Ribs which are only attached to spinal cord are:
Floating Ribs
Choose an option containing the correct information:
➡6 paired facial bones
➡2 unpaired facial bones
How many coxal bones are present in human body?
2
Knee and elbow joints are examples of:
Hinge Joint
Which of the following is an example of synovial joint?
Joint between radus and ulna
Elbow joint is an example of:
Hinge Joint
Joint that is immovable:
Sutures
Joint between costal arch and sternum is:
Cartialginous
Acute forms of arthritis usually result from ___ invasion.
Bacterial
Antibodies attack joints in
Rheumatoid Arthritis
Irregular striations and involuntary control is related to:
Cardiac Muscle Cells
Which one of the following is correct regarding ligaments and tendons?
Both are specialized connective tissue
Earliest form of muscles is:
Smoothe
Brachioradialis:
Is inserted into radius
The main functional partners of bones are:
Skeletal Muscle
The type of muscle which exhibits striations at regular intervals, is multinucleated and whose control is neurogenic is the:
Skeletal Muscle
Which one of the following muscles is considered as “Voluntary Muscle”?
Skeletal Muscles
Which one of the following are “myogenic” types of muscles?
Cardiac Muscles
Connective tissue wrapping around a muscle that is found continuous with tendons:
Epimysium
The sarcoplasmic reticulum is like this:
Smooth Endoplasmic Reticulum
Sarcolemma is primarily made up of:
Lipoprotein
Which one of the following structures serves as a center of the sarcomere?
M-Line
Which one of the following is correct regarding A-bad?
Myosin acts as a polarizer of light
T-tubules in human skeletal muscles are present at:
A-I Junction
Diameter of each myofibril is approximate:
2 μm
Which of the following is a true statement?
Muscle cell has many myofibrils
Which of the following band allows most of the light to pass through it?
I-Band
Chief component of thin filamets is:
Actin
The sliding protein of muscle
Actin
The point of attachment o the nerve to the muscle is called a ____ junction.
Neuro-Muscular
The repeated protein pattern of myofibrils is called:
Sarcomere
A sarcomere is the region of a myofibril between two successive:
Z-Lines
The sarcolemma of muscle fiber folds inwards and forms a system of tubes which runs through the sarcoplasm called:
Transverse Tubules
Each muscle fiber is surrounded by a modified cell membrane called:
Sarcolemma
Overlapping of thick filament occurs in:
A-Band
The sarcolemma is the membrane around?
Muscle Fiber
Each muscle fiber contains long threads that extend along its entire length. These are called as:
Myofibrils
The microtubules in the cytoskeleton are made up of proteins:
Tubulin
The functional unit of a muscle is known as:
Sarcomere
Thin filaments of muscles contain ______ chains of actin molecules.
Two
The thick filaments in a myofibril of muscles are made up of:
Myosin
What do we call the cell surface membrane of a muscle fiber?
Sarcolemaa
Globular monomers are present in:
Actin
A muscle protein that has 3 polypeptides:
Troponin
Cross bridges form between:
Actin filaments and myosin heads
When a muscle is at rest, what blocks myosin from binding to actin?
Tropomyosin
All of the following are true regarding muscle contraction except:
➡I band shortens❌
➡A band remains unchanged❌
➡Z lines get closer’❌
➡M line disappears✅
Contractile protein of skeletal muscle cells involving ATPase activity is:
Myosin
Which triggers the release of calcium ions from the sarcoplasmic reticulum?
An action potential
According to sliding filament theory, when muscle fibers are stimulated by the nervous system, which of the following changes occurs?
I-Bands shorten
A motor unit is made up of:
A motor neuron and the muscle fiber it innervates
It acts as immediate source of energy for muscles contraction.
ATP
When muscles contracts, thick and thin filaments undergo:
Overlapping
The function of calcium ions n muscle contraction is to:
Bind to troponin molecules and cause them to move
Each myosin molecule has one tail and:
2 globualr heads
The protein filament which binds to calicum:
Troponin
The majority of muscles of our body are:
Skeletal
Each muscle fiber is surrounded by a membrane which is called:
Sarcolemma
During muscle contraction:
I-Band shortens
The sliding protein fo muscle is:
Actin
The pigment which stores oxygen in muscles is:
Myoglobin
The length of myofibril from one Z-band to the next Z-band is known as:
Sarcomere
Calcium ions released during a muscle fiber contraction attach with:
Troponin
Regarding skeletal muscle structure, the area which contains only thick filmants:
H-Zone
For muscle contraction, calcium ions in sarcoplasm are released from:
Sarcoplasmic reticulum
Which of the following is a structural unit of skeletal muscles?
Muscle FIber
A sarcomere is an area between:
Two Z-lines
The smallest contractile part of a skeletal muscle is:
Sarcomere
Which band does not change its length during muscle contraction?
A-Band
T-tubules in skeletal muscles are formed by:
Sarcolemma
Bones protect critical internal organs like:
➡Brain
➡Spinal Cord
➡Heart
A statement not true about bones and cartilages:
Both contain the same type of living tissue
The total number of “Free Ribs” in the human body is:
4
Knee and elbow joints are examples of:
Hinge Joint
Which of the followings are characteristics of visceral muscles except:
➡Contain Muscle Proteins❌
➡Have Multiple nuclei✅
➡Have striations❌
➡Help in peristalsis❌
Muscle is derived from:
Mesoderm
The dark bands (A-Bands) of a skeletal muscle are known as:
Anisotropic Bands
The motor unit is best described as:
A single motor neuron and all the muscle fibers that it innervates
Which of the following pairs is correctly matched:
Fibrous Joint ➡Flat skull bones
ATPase activity is associated with:
Myosin
