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Skeletal and muscular Systems ch 7, 8, 9, 11
bones, joints, movement, major bones, calcium homeostasis
34
Biology
Undergraduate 1
05/30/2016

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Cards

Term
What does dystrophy mean?
Definition
Disorder where organ / tissue wastes away (degeneration)
Term
What does hypertrophy mean?
Definition
Enlargement of an organ /tissue from increase in size of its cells 
Term
What is the major mineral found in bones?
Definition
calcium
Term
Calcium commonly bonds to what?
Definition
phosphate
Term
What is the major protein found in bone?
Definition
Collagen
Term
Osteoblasts (build) are:
Definition
Bone maker / thickeners
Term
Osteoclasts (clean) are: 
Definition
Bone dissolvers / thinners
Term
2 hormones that maintain homeostatic blood calcium and phosphate levels?
Definition
Calcitriol and parathyroid hormone 
Term
5 mechanism body uses to restore amount of calcium and phosphate in blood to get back to homeostatic levels?
Definition

1.       Bone: increase release of calcium from bone into blood – ncrease osteoclast activity

2.       Kidney: decrease calcium release in urine

3.       Small intestine: calcitriol increases absorption of calcium

4.       PTH release: increase osteoclast activity, inhibits osteoblast activity

Calcitriol: calcium reuptake into kidney into blood

Term
What do you call an individual muscle cell?
Definition
Muscle fiber / myocyte (smooth / cardiac / skeletal)
Term
Whats the main component of muscle cells?
Definition
Myofibrils
Term
What are sarcomeres?
Definition
Muscle contractile unit
Term
What neurotransmitter is involved in signalling skeletal muscle? 
Definition
Acetylcholine (ACh) which binds Na channels causing action potential 
Term

What is the effect of decreased:

protein

Calcium

In bone?

Definition

Protein (collagen) – organic matter: brittle

Calcium - mineral: soft 

Term
6 parts of the bone
Definition

Diaphysis: hollow shaft

Central / medullary canal: shaft containing yellow marrow

Epiphyses: ends of diaphysis. Site of bone growth, covered by articular cartilage

Epiphyseal cartilage: separates epiphysis from diaphysis, site of growth in length

Red marrow: site of blood cell production / haemopoiesis. Foundi n all bones of kids, adults found in long bones

Yellow marro: not haemopoietic 

Term
What are joints and what are the 3 types?
Definition

Two bones meet, site of movement

 

Fibrous: immovable e.g. sutures in skull

Cartilaginous: immovable and slightly movable e.g. intervertebral joints

Synovial joints: freely movable

Term
What does synovial fluid do? (3)
Definition

Lubricates to prevent friction of synovial joint

Provides nutrients and removes wastes

Shock absorber

Term

Define each of the following

Flexion

Extension

Abduction

Adduction

Rotation

Pronation

Supination

Inversion

Eversion

Dorsiflexion

Plantar flexion

Definition

Flexion: bending joint, making angle acute e.g. bending knees flexes knees and hips

Extension: straightening a joing to make angle more obtuse e.g. standing up from a chair

Abduction: move parts away from body

Adduction: moving parts towards body

Rotation: twisting e.g. shaking head no

Pronation: hands down

Supination: hands up

Inversion: sole in

Eversion: sole out

Dorsiflexion: toes up

Plantar flexion: toes down

Term
What does articulate mean?
Definition
Touch / meet
Term
Do all the digits of the hand have the same number of bones?
Definition
No 
Term
What are the anterior muscles of the thigh called?
Definition
Quadriceps, thigh flexion and knee extensions
Term
What are the posterior muscles of the thigh calls?
Definition
Hamstrings, knee flexion
Term
What is another name for Achilles tendon?
Definition
Calcaneal tendon
Term
Are the rectus abdominis muscles medial or lateral to the external oblique muscles?
Definition
medial
Term

Where are the following muscles?

1.       Pectoralis major

2.       Latissimus dorsi

3.       Deltoid

4.       Trapezious

5.       Sternocleidomastoid

6.       Biceps brachii

Triceps brachii

Definition

1.       Upper chest

2.       Lower back, triangular

3.       Shoulder

4.       Upper back

5.       Neck

6.       Front

 

7.       Back 

Term
In the parasympathetic system – preganglionic fibres are ______ and postganglionic fibres are _____?
Definition
Long, short 
Term
What receptor can be found at the neuromuscular junction?
Definition
Nicotinic receptor
Term
What is the effector for the patellar reflex?
Definition
Quadriceps
Term
An example of an encapsulated tacilte receptor?
Definition
Krause bulb
Term
Which adrenergic receptor leads to an increase in heart rate?
Definition
Beta 1 
Term
Where is the spiral organ of Corti?
Definition
Cochlea
Term
What type of receptors can be found on target cells responding to ACh 
Definition
Cholinergic receptor
Term
Which taste sensation comes from presence of alkaloids?
Definition
bitter
Term

Give an example of a 

long 

irregular

flat 

short

bone

Definition

long: tibia

irregular: vertabrae, sacrum

flat: scapula, sternum 

short: carpals, tarsals

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