Units 4 & 5 EXAM Flashcards
Skeletal muscle moves bones, stimulated by what?
Motor muerons
What is Muscle contractility?
Is the ability of muscle cells to shorten forcefully.
Muscles =
Movement
What are ligaments
Connective tissue that attaches bone to bone
What is a tendon
connective tissue that attaches muscle to bone
What is the origin of the bone
It’s a stable bone that doesn’t move
What is an insertion bone?
It’s a movable bone
Muscles are stimulated by motor neurons in the?
PNS (Peripheral nervous system)
Type of muscle: Skeletal muscle, does it have stations, and is it voluntary?
Yes, it has striations, and it is voluntary
Type of muscle: Smooth muscle, does it have stations, and is it voluntary?
No striations, and it is involuntary
it also lines orgens
Type of muscle: Cardiac muscle, does it have stations, and is it voluntary?
Yes it has striations and it is involuntary
What’s a big point about Cardiac muscles?
They are intercalated discs
What’s an example of movement towards the midline of the body?
Adduction
What is Adduction
The movement of a joint or body part inward toward the midline
What do skeletal and smooth muscles have in common?
Both move by contracting and relaxing
What kind of muscle primarily helps to move food within the digestive system?
Smooth
During a muscle contraction motor neuron releases?
acetylcholine muscle
What is the science behind rigor mortis: Why is the state a temporary condition?
To release from a bent/ contracted position needs an ATP molecule to restore normal
How do actin and myosin in the sarcomere shorten the muscle as a whole
Actin, when exposed to Ca++ they starts to build sites, and myosin is a cross-bridge that uses ATP to contract needs new ATP to relax
What is Rigor mortis?
After death, the body releases Ca++ and ATP, causing joint and muscle stiffening within a few hours, lasting one to four days.
Explain Blood flow through the heart
- De
