Which of the following event will occur when depolarizing graded potential's reach the
membrane of the axon Hillock, causing its membrane potential to reach threshold?
A. Ligand-gated Ca++ channels close rapidly
B. Voltage-gated Ca++ channels open rapidly
C. Ligand-gated Na+ channels close rapidly
D. Voltage-gated Na+ channels open rapidly
E. Ligand-gated Cl+ channels close rapidly
ANSWER
D. Voltage-gated Na+ channels open rapidly.
The attachment of the muscles tendon to the stationary bone is called the _________? ; The
attachment of the muscles other tendon to the movable bone is called the__________?
A. Origin ; action
B. Insertion ; action
C. Origin ; insertion
D. Stabilizer ; mover
E. Insertion ; origin
ANSWER
C. Origin ; Insertion
The sarcoplasmic reticulum stores
1
, A. Oxygen
B. Glycogen
C. ATP
D. Calcium ions
E. Glucose
ANSWER
D. Calcium ions
Which of the following is NOT a function of smooth muscle tissue?
A. Altering the diameter of the respiratory passageways
B. Elevating hairs on the arm
C. Blinking the eyelid
D. Moving food materials along the digestive tract
E. Moving urine from the kidneys into the bladder
ANSWER
C. Blinking the eyelid
_________ is the summation of postsynaptic potentials in response to stimuli that occur at
different locations in the membrane of a postsynaptic cell at the same time
A. Cortical summation
B. Spatial summation
C. Temporal summation
D. Tactile summation
E. Olfactory summation
ANSWER
B. Spatial summation
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membrane of the axon Hillock, causing its membrane potential to reach threshold?
A. Ligand-gated Ca++ channels close rapidly
B. Voltage-gated Ca++ channels open rapidly
C. Ligand-gated Na+ channels close rapidly
D. Voltage-gated Na+ channels open rapidly
E. Ligand-gated Cl+ channels close rapidly
ANSWER
D. Voltage-gated Na+ channels open rapidly.
The attachment of the muscles tendon to the stationary bone is called the _________? ; The
attachment of the muscles other tendon to the movable bone is called the__________?
A. Origin ; action
B. Insertion ; action
C. Origin ; insertion
D. Stabilizer ; mover
E. Insertion ; origin
ANSWER
C. Origin ; Insertion
The sarcoplasmic reticulum stores
1
, A. Oxygen
B. Glycogen
C. ATP
D. Calcium ions
E. Glucose
ANSWER
D. Calcium ions
Which of the following is NOT a function of smooth muscle tissue?
A. Altering the diameter of the respiratory passageways
B. Elevating hairs on the arm
C. Blinking the eyelid
D. Moving food materials along the digestive tract
E. Moving urine from the kidneys into the bladder
ANSWER
C. Blinking the eyelid
_________ is the summation of postsynaptic potentials in response to stimuli that occur at
different locations in the membrane of a postsynaptic cell at the same time
A. Cortical summation
B. Spatial summation
C. Temporal summation
D. Tactile summation
E. Olfactory summation
ANSWER
B. Spatial summation
2
