support and movement Flashcards
How many muscles are there in the human body?
650
½ our body weight comes from muscles
veterbral column has how many bones in adults
26
veterbral column has how many bones in infants
33
Skeletal muscle has how many parts?
3
1. Origin
2. Belly
3. Insertion
Which of the following is the largest bone in the human body?
femur
Bone matrix is hardened by the
Calcium phosphate
First vertebra of cervical region of vertebral column is known as:
Atlas
which ions help in muscle contraction
In muscle contraction, both Ca2+ and Mg2+ are used. Ca2+ helps in the formation of actomyosin by combining actin and myosin proteins. This will provide contraction in muscle. ATPase activity of myosin requires both Ca2+ and Mg2+. This helps in release of energy.
Tendon and ligament are example of
Dense regular connective tissue
Which type of muscles have intercalated disc?
Intercalated discs allow cardiac muscles to contract in a wave-like pattern.
Intercalated disc represents the undulating double membranes where two cells are tightly bounded together by desmosome.
The I band have midline called
The I band have midline called Z–line (Z for zwishen means between).
Sarcoplasm of muscle fibres differs from cytoplasm of other cells as it contains usually?
It mainly contain unique oxygen binding protein called myoglobin. It stores oxygen to be used during exercise
The cartilage matrix is covered by a dense layer of collagen fibres, called:
Perichondrium
When the electrical impulses reaching a muscle fibre cease the sarcoplasmic reticulum begins to re-accumulate the calcium ions by:
Active Transport
epiglottis and pinna are made up of which cartilage
elastic
which parts are made of hyaline
Trachea, larynx and nasal
Which joint is also known as suture
Suture are present in skull and has fibrous joint
Joint of sternum and ribs is
Cartilaginous
what is concerned with rheumatoid arthritis?
cartilage
The functional partners of bone is
Skeletal muscle
A cup like socket of shoulder joint is:
glenoid
which type of muscle is branched
only cardiac
_______% of the energy expended in muscles contraction is used in work?
35
while rest 65% raises the temperature of body
ankle joints are
Cartilaginous
Diameter of myofibril is _______ μm?
1–2 μm
Which one causes resorption?
Osteoclast cells & parathormone
The joints in the wrist are __________ joints.
Cartilaginous
Longest cytoplasmic extensions are found in?
Osteocytes
regeneration of cartilage is carried out by
perichondrium
bone 🦴 is surrounded by a membrane called
periosteum
process of bone formation is called
ossification
how many cervical vertebrae r there
7
how many thoracic vertebrae and pairs of thoracic nerves are there
12
how many vertebrae in lumbar
5
how many vertebrae in sacrum
5
how many vertebrae in coccyx
4
no of hyoid bone in skull region
1 (neck)
total no of cranium bones
8
total floating ribs
4
total auditory ossicles
6
in human skull the unpaired bones are
FOES
frontal
occipital
ethmoid
sphenoid
contraction can be sustained for a long period of time by what muscles
smooth
the color of bone marrow is
yellow and red
most abundant cartilage
hyaline
cartilage has no blood vessels so how does transport occur
thru diffusion
which protein of muscle behaves like enzyme during muscle contraction
myosin
collagen fibers are secreted at the broken ends of bones by
chondroblasts
hyaline cartilage forms joint between
growing bone
what is located at both sides of A band?
I band
diameter of myofibrila
1-2 micrometers
what type of collagen is in cartilage
type 2
what type of enzyme is myosin
ATP hydrolase
skeletal muscle is surrounded by
epimysium
its present in cardiac muscle but absent in smooth muscle
troponin
metacarpel joint is
saddle joint
which bone cell is multinuceated
osteoclasts
which joint has joint cavity
hinge joint
which bones is syndesmosis between
long bones
