chap 8 Flashcards
(24 cards)
Each tiny contracting unit of a muscle is called a
sarcomere
are skelETAL MUSCLES LONG OR SHORT?
LONG
do skeletal muscles have one nucleus?
No multiple
Skeletal muscle cells are also called
myofibrils
myo =
muscle
The cytoplasm of a muscle cell is called
sarcoplasm
What is the ion that turns on the contraction process?
Calcium
Muscle contraction requires energy in the form of
ATP
The form of glucose that can be stored in muscle fibers is called
Glycogen
Can visceral smooth muscle cells contract by themselves?
Yes
Can cardiac muscle cells contract on their own?
Yes
Is cardiac muscle striated?
Yes
Cardiac muscle is voluntary or involuntary?
Involuntary
Cardiac muscle is only found in the
Heart
The protein in muscle that can store oxygen is called ____________________
Myoglobin
The attachment sites between cardiac muscle cells that also help to transmit nerve impulses are called
intercalated discs
When oxygen and glucose are used to make ATP for muscle contraction, that process is called _________________ metabolism.
Aerobic metabolism
During muscle contraction, ATP breaks off one phosphate bond and becomes ______________.
ADP
The more stable site of a muscle attachment, which does not move much, is called the _______________.
Origin
The more moveable site of a muscle attachment is called the _________________________.
Insertion
What is the neurotransmitter that is released from neuron synaptic bulbs into the synaptic space and binds to a muscle cell?
Acetylcholine
Skeletal muscles are attached to bones by _________________.
Tendons
Broad sheets of connective tissue that connect muscles to other muscles are known as…
aponeuroses
Does visceral smooth muscle react to stretching?
yes
