When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the A bands do not diminish in length.
Indicate whether the statement is true or false
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Question 2) Why are epiphyseal plates considered temporary joints?
What will be an ideal response
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Question 3) The effect of a neurotransmitter on the muscle cell membrane is to modify its ion permeability properties temporarily.
Indicate whether the statement is true or false
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Question 4) Which joints are correctly matched?
A) interphalangeal; plane
B) ankle; hinge
C) elbow; pivot
D) wrist; saddle
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Question 5) In symphysis joints the articular surfaces of the bones are covered with ________.
A) synovial membranes
B) fibrocartilage
C) tendon sheaths
D) hyaline cartilage
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Question 6) Fibrous joints are classified as ________.
A) hinge, saddle, and ellipsoidal
B) sutures, syndesmoses, and gomphoses
C) symphysis, sacroiliac, and articular
D) pivot, hinge, and ball and socket
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Question 7) A resting potential is caused by a difference in the concentration of certain ions inside and outside the cell.
Indicate whether the statement is true or false
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Question 8) After nervous stimulation stops, what prevents ACh in the synaptic cleft from continuing to stimulate contraction?
A) the tropomyosin blocking the myosin once full contraction is achieved
B) acetylcholinesterase destroying the ACh
C) calcium ions returning to the terminal cisternae
D) the action potential stops going down the overloaded T tubules
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Question 9) Cells of unitary smooth muscle are found in the longitudinal and circular muscle layers of the intestine.
Indicate whether the statement is true or false
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Question 10) Synarthrotic joints ________.
A) characterize all cartilaginous joints
B) are found only in adults
C) have large joint cavities
D) are immovable joints
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