Muscle structure
Muscle cell is called a
Muscle fiber or myofiber
1. THIS IS THE NEUROTRANSMITTER RELEASED AT THE NEURO-MUSCULAR JUNCTION
2. THIS ENZYME BREAKS IT DOWN WHEN THE NERVE IMPULSE CEASES
1. ACETYCHOLINE
2. ACETYCHOLINESTERASE
A QUICK CONTRACTION BY A SINGLE FIBER IS CALLED A:
IF MULTIPLE ONES OCCUR, IT IS CALLED:
Twitch
Summation
These muscles lack striations and are involuntary.
These muscles have striations and are involuntary
Smooth
Cardiac
Where is the genetic material present in the neuron
Soma ( cell body)
Give the names of the following structures:
1. THE ENDOPLASMIC RETICULUM OF A MUSCLE CELL
2. THE CELL MEMBRANE OF A MUSCLE CELL
1. Sarcoplasmic reticulum
2. Sarcolemma
1. THE COMBINATION OF THE MOTOR NEURON AND MUSCLE IS CALLED THE:
2. WHAT IS THE AFFECT OF THE NEUROTRANSMITTER (FROM THE NEURON) ON THE MUSCLE CELL?
1. MOTOR UNIT
2. RELEASE OF CALCIUM (FROM SARCOPLASMIC RETICULUM)
WHAT IS THE “FUEL’’ FOR MUSCLE CONTRACTION?
ATP
These are only found in muscle that is involuntary and striated, and they connect these cells to allow them to work as a functional organ.
Intercalated discs
What structure covers the active sites in actin?
Tropomyosin
WHAT IS THE NAME OF THE CONTRACTILE UNIT OF A MUSCLE?
Sarcomere
_____ exposes actin binding sites after Ca+2 binds to ______
Tropomyosin Troponin
lTHIS BUILDS UP TO MAKE MUSCLES SORE AFTER A STRENUOUS WORKOUT
Lactic acid
Give an example of a visceral smooth muscle
Internal organs
Blood is made in what bone marrow?
Red bone marrow
BEGINNING WITH MYOFILAMENTS, GIVE THE LEVELS OF ORGANIZATION OF A MUSCLE FROM SMALLEST TO LARGEST (4 TOTAL)
MYOFILAMENTS (ACTIN AND MYOSIN)
MYOFIBRILS
MUSCLE FIBERS/ MYOFIBERS/ MUSCLE CELLS
FASCICLES
MUSCLE
PUT THE FOLLOWING STAGES IN ORDER
1) Calcium is released from the S.R.
2) A nerve impulse reaches the synapse
3) Calcium allows the myosin-actin complex
to connect
4) Acetylcholine crosses the synaptic cleft
5) Acetylcholine is broken down
6) The nerve impulse ceases
l2) A nerve impulse reaches the synapse
l4) Acetylcholine crosses the synaptic cleft
l1) Calcium is released from the S.R.
l 3) Calcium allows the myosin-actin complex to connect
l6) The nerve impulse ceases
l5) Acetylcholine is broken down
As the sarcomere contracts, which of the following shorten(s) in length or disappear(s)?
Z line
I band
A band
H zone
M line
I band
H zone
Identify any 3 things needed for a muscle to contract.
ATP
Calcium
Neurotransmitter
Blood Supply
What kind of skeleton do echinoderms have?
Endoskeleton
WHICH 3 MICROSCOPIC COMPONENTS MAKE UP THE
TRIAD IN SKELETAL MUSCLE?
A. SARCOPLASMIC RETICULUM, MYOFIBER, T-TUBULE
B. SARCOPLASMIC RETICULUM, MYOFIBER, MYOFIBRIL
C. SARCOPLASMIC RETICULUM, T-TUBULE, SARCOPLASMIC RETICULUM
D. T-TUBULE, MYOFIBER, MYOFIBRIL
Sarcoplasmic reticulum, T tubules, Sarcoplasmic reticulum
1. THIS MODEL DESCRIBES HOW THE SARCOMERE CONTRACTS.
2. THESE ARE THE STEPS OF THAT MODEL (START WITH ENERGIZED CROSSBRIDGES ATTACHED)
l1) ADP and P are released causing the power stroke
l2) ATP binds, causing Actin and Myosin to disconnect
l3) ATP is split, re-energizing the myosin head 4) Calcium is released, exposing the myosin bonding site.
Its length does not change during contraction
A band
This muscle resists the muscle responsible for most of the movement
Antagonist
Transitional epithelium is present where?
( Hint-special case)
Urinary bladder and parts of urethra/ ureter