Exam 2 Pt 4 Flashcards Preview

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Flashcards in Exam 2 Pt 4 Deck (17)
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1
Q

Synaptic Transmission

A

neurotransmitters are released by the axon terminal and bind to activate the receptors on the dendrites on another neuron

2
Q

Excitation-Contraction Coupling (E-C Coupling)

A

Action potential in skeletal muscle caused by release of acetylcholine from somatic motor neuron

Action potential stimulates SR to release Calcium and trigger contraction

Calcium binds to troponin, pulls tropomysin away from myosin binding sites on actin

3
Q

Cross-Bridge Cycle

A

Events of E-C expose myosin binding sites

Cocked myosin head attaches to actin forming a “cross-bridge”

Myosin head pulls actin toward the center of sarcomere

ATP attaches to myosin head causing it to release actin

ATP hydrolyzed to ADP, releasing energy and allowing myosin head to return back to cocked position

4
Q

Method of development for long bones

A

Endochondral ossification

5
Q

Method of development for short bones

A

Endochondral ossification

6
Q

Method of development for irregular bones

A

Endochondral ossification

7
Q

Method of development for flat bones

A

Intramembranous ossification

8
Q

Characteristics of skeletal muscle

A

Voluntary
Striated
Not branched
Multinucleated

9
Q

Function of glycosomes in skeletal muscle

A

Stored glycogen that provide glucose during muscle cell activity

10
Q

Function of myoglobin

A

Red pigment that stores oxygen

11
Q

Function of Sarcoplasmic Reticulum

A

Regulates the concentration of calcium ions in the cytoplasm of striated muscle cells

12
Q

Function of T Tubles

A

Synchronization of calcium release

13
Q

Define Sarcomere

A

A structural unit of a myofibril (between 2 Z disks)

14
Q

Sarcomere features

A

A band
I band
H zone
M line

15
Q

M line

A

Attachment site for think filaments

16
Q

H zone

A

region between ends of A band

17
Q

A band and I band

A

Create striated appearance