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Principles Anatomy > How We Move > Flashcards

Flashcards in How We Move Deck (18)
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1
Q

Is cardiac muscle voluntary or involuntary?

A

involuntary

2
Q

Myocytes are made from myofibrils - what are myofibrils made of?

A

Actin and myosin microfilaments

3
Q

What are striations caused by?

A

overlapping actin & myosin microfilaments of the sarcomere

4
Q

What is an aponeurosis?

A

A flattened tendon

5
Q

What do aponeuroses attach?

A

muscle to soft tissue

6
Q

Which area of attachment of muscle to bone, the origin or insertion, moves most during contraction?

A

insertion

7
Q

What are the 3 actions of the biceps brachii muscle?

A

flexor of the shoulder, flexor of the elbow and supination of the forearm

8
Q

What do the anterior fibres of the deltoid muscle do?

A

flex shoulder

9
Q

What do the posterior fibres of the deltoid muscle do?

A

extend the shoulder

10
Q

What do the middle fibres of the deltoid muscle do?

A

abduct the shoulder

11
Q

What permits circumduction of the shoulder?

A

shallow socket of the glenoid fossa of the scapula

12
Q

What type of reflexes are “biceps jerk”, triceps jerk”, “knee jerk”& “ankle jerk” reflexes?

A

stretch reflexes

13
Q

What is skeletal muscle’s normal reflex response to being stretched?

A

to contract

14
Q

What does reflex contraction of the muscle result in?

A

a brief twitch of its belly or a movement in the normal direction

15
Q

What is is the synapse where the motor nerve communicates with the skeletal muscle?

A

neuromuscular junction

16
Q

In which of these, paralysis or spasticity, is there a non functioning motor nerve?

A

Paralysis

17
Q

In compartment syndrome, when is pain most severe?

A

on passive stretching of the compartment’s muscles during plantar flexion

18
Q

What type of muscles are those that perform the protective reflexes of coughing, sneezing, gagging, swallowing & vomiting?

A

skeletal