CH LOCOMOTION AND MOVEMENT Flashcards
What are the three different types of movement
- Amoeboid or pseudopodial movement by Leucocytes and Macrophages
- Ciliated/ Flagellated Movement - In the fallopian Tube and in trachea that helps in removal of dust particles. Spermatozoa shows Flagellated movement
- Muscular Movement -
three types of muscular tissue Skeletal, Smooth, Cardiac
______ helps in attachment of mucles to bones
Tendons
How many muscles are there in the human body
There are 639 muscles in the human body
How much of the body weight do muscles make up in adult human
40 - 50 percent of the body weight
What are the unique properties of muscles
CONTRACTIBILITY, EXCITABILITY, ELASTICITY, EXTENSIBILITY
The muscular tissue is made up of specialised cells k/a
Myocytes
One muscle fiber is arranged in a bundle k/a
Fasciculi
The structural and functional unit of Myofibril is
Sarcomere
What are the different types of myofilament
- Thin Myofilament
- Thick Myofilament
Name the contractile protein
Actin and Myosin
What is the content of 1 Sarcomere
1/2 I band + 1 A Band + 1/2 I Band
What is the full form of A-band and I-band
A-band stands for Anisotropic band
I-band stands for Isotropic band
The part of Myofibril present between two successive Z-line is called
Sarcomere
What does thin myofilament contain
- Actin
- Tropomyosin
- Troponin
What is the monomeric unit of Myosin
Meromyosin
What are the parts of meromyosin
Each meromyosin has 2 parts- A globular head with short arm and a tail
The tail of meromyosin is also k/a is also
Light Meromyosin
The globular head along with cross arm of meromyosin makes up the
Heavy Meromyosin
Actin is a _____ protein and occurs in two forms they are- ______ is the monomeric form and ______ polymeric form
Actin is a globular protein and occurs in two forms they are- G actin is the monomeric form and F actin is the polymeric form
Name the regulatory proteins in the muscles
Troponin and Tropomyosin
Polymerization of G actin to form F actin happens in the presence of
Magnesium Ion
Troponin is ____ protein
Trimeric Protein
Tropomyosin is a _____ molecule
Fibrous
What is the function of different Troponin
Troponin I – It inhibits the actin and myosin interaction
Troponin T -It is the binding site of Tropomyosin
Troponin C - It is the binding site of Calcium
What are the different sites present on the globular head of meromyosin
Actin binding site and ATP binding site
During Contraction Muscles can shorten by ___ of their length
1/3 to 1/2 of their length
Globular head of Myosin molecule acts as
ATPase Enzyme
The store house of Ca2+ in the muscle cells is
Sarcoplasmic reticulum
What is a neuromuscular junction
The junction between the motor Neuron and the Sarcolemma of the muscles is called as Neuromuscular junction
The mechanism of Muscle Contraction is explained by which theory
Sliding Filament Theory Explains the mechanism of muscle Contraction
How does contraction of Muscles occur
Contraction of muscles occurs when the thin filament i.e. actin slides over the thick myofilament i.e. Myosin
Which is the neurotransmitter helping in Contraction of muscle
Acetylcholine
The potential difference across the membrane of a relaxed muscle fiber called resting potential amounts to
-90 mV
What is a neuromuscular Junction
The junction between a motor neuron and sarcolemma of the muscle fiber is called as Neuromuscular junction
Acetylcholine is rapidly broken down by an enzyme which is k/a
Acetylcholinesterase
For storage of Calcium ions in the SR there is a protein which is k/a
Calsequestrin Protein
The number of bones at the time of birth are________ and in adults are ____
The number of bones at the time of birth are 213 and in adults are 206
The skeleton in humans is divided into two parts, they are. No of bones in each of them is
- Axial Skeleton - 80 bones
- Appendicular Skeleton - 126 bones
No of bones in skull
29
No of bones in Vertebral column
26
The no of bones in Ribs+ Sternum
24+1
The first Cervical Vertebrae is k/a
Atlas
The Second Cervical Vertebrae is k/a
Axis
Name the different bones present in the skull
- Facial Bones
- Cranium
- Ear Ossicles
- Hyoid Bones