Deck 17: Organization of Skeletal Muscles

Question 1

What prevents the ACh from continuing to stimulate the muscle?

A) tropomyosin blocks the myosin
B) calcium returns to the sarcoplasmic reticulum
C) acetylcholinesterase destroys the ACh
D) none of the above

Answer 1

C

Question 2

Which part of the sarcolemma contains acetylcholine receptors?

A) any part of the sarcolemma
B) motor end plate
C) end of a muscle fiber
D) none of the above

Answer 2

B

Question 3

The muscle term cleido or clavius indicates which part of the body?

A) clavicle
B) coccyx
C) skin
D) ribs

Answer 3

A

Question 4

Which of the following surrounds an entire muscle?

A) epimysium
B) endomysium
C) perimysium
D) tendon

Question 5

What produces the striations of a skeletal muscle cell?

A) the sarcoplasmic reticulum
B) t-tubules
C) sarcoplasm
D) myofilaments

Question 6

The muscle term femoris indicates which part of the body?

A) femur
B) thoracic region
C) tibia
D) lumbar region

Question 7

Which are composed of actin?

A) all myofilaments
B) thin filaments
C) thick filaments
D) none of the above

Question 8

The cell membrane of a muscle cell is called ________.

A) endomysium
B) epimysium
C) perimysium
D) sarcolemma

Question 9

What is the role of calcium in skeletal muscle?

A) re-establishing glycogen stores
B) forming hydroxyapetite crystals
C) binding with the tropomyosin to remove contraction inhibition
D) none of the above

Question 10

Which structure in the muscle cell stores calcium?

A) transverse tubules
B) sarcolemma
C) sarcoplasmic reticulum
D) myofibril

Question 11

The areas near the Z lines that contain only thin filaments are ________.

A) A bands
B) I bands
C) zones of overlap
D) none of the above

Question 12

The muscle that has brevis in its name is ________.

A) wide
B) slender
C) short
D) white

Question 13

The functional units of skeletal muscle are ________.

A) sarcomeres
B) t-tubules
C) microtubules
D) mitochondria

Question 14

What is the neurotransmitter that causes skeletal muscle contraction?

A) glutamate
B) epinephrine
C) acetylcholine
D) dopamine

Question 15

The role of tropomyosin in skeletal muscle is ________.

A) the contracting unit
B) containing neurotransmitters
C) blocking the active sites on the actin to regulate muscle contraction
D) blocking the active sites on myosin to regulate muscle contraction

Question 16

The muscle term abdominis indicates the muscle is found in which part of the body?

A) wrist
B) elbow
C) brachium
D) abdomen

Question 17

Which area of a sarcomere only contains thick filaments?

A) zone of overlap
B) A band
C) I band
D) H zone

Question 18

The muscle term deltoid refers to what shape of the muscle?

A) flat
B) triangle
C) circle
D) trapezoid