Anatomy Test Part 2

206 Questions | By Bowchicka777 | Updated: Mar 18, 2022 | Attempts: 118

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1.

This is a band of connective tissue that surrounds muscles.
- A.
  
  Tendon
- B.
  
  Ligament
- C.
  
  Endomysium
- D.
  
  Epimysium
- E.
  
  Perimysium
2.

When connective tissue extends as a broad flat layer, the tendon is referred to as
- A.
  
  Perimysium
- B.
  
  Deep fascia
- C.
  
  Fascicle
- D.
  
  Aponeurosis
- E.
  
  Endomysium
3.

For every nerve that penetrates a skeletal muscle there are general how many arteries and veins?
- A.
  
  One artery and one or two veins
- B.
  
  Two arteries and two veins
- C.
  
  Three arteries and two veins
- D.
  
  One artery and three veins
- E.
  
  One artery and a varied amount of veins
4.

Axon terminal clusters at the ends of neuromuscular junctions are referred to as:
- A.
  
  Myelin bulbs
- B.
  
  Neuromuscular bulbs
- C.
  
  Synaptic end bulbs
- D.
  
  Axon collateral bulbs
- E.
  
  Tubule bulbs
5.

After the fusion of myoblasts, the muscle fiber loses its ability to do what?
- A.
  
  Grow
- B.
  
  Lengthen
- C.
  
  Contract
- D.
  
  Go through cell division
- E.
  
  All of the answer choices
6.

The sequence that muscle action potentials must go through to excite a muscle cell
- A.
  
  Sarcolemma, axon of neuron, T tubules
- B.
  
  T tubules, sarcolemma, myofilament
- C.
  
  Muscle fiber, axon of neuron, myofibrils
- D.
  
  Axon of neuron, sarcolemma, T tubules
- E.
  
  Myofibrils, myofilaments, mitochondria
7.

The mitochondria in muscle fiber are arranged
- A.
  
  Randomly throughout the sarcoplasm.
- B.
  
  In circles around the T-tubules.
- C.
  
  Around the nuclei
- D.
  
  In rows near the contractile muscle proteins.
- E.
  
  Close to the sarcolemma
8.

These are the contractile organelles of the muscle fiber.
- A.
  
  Myofibrils
- B.
  
  Myoglobin
- C.
  
  Mitochondria
- D.
  
  Z discs
- E.
  
  M lines
9.

This part of the skeletal muscle cell releases calcium when stimulated by the T tubules.
- A.
  
  Myofibrils
- B.
  
  Mitochondria
- C.
  
  Terminal cisterns of sarcoplasmic reticulum
- D.
  
  T-tubules
- E.
  
  None of the answer choices
10.

The sarcoplasmic reticulum is used for storing
- A.
  
  Oxygen
- B.
  
  ATP
- C.
  
  PO43-.
- D.
  
  Na+.
- E.
  
  Ca2+.
11.

Which of the following contain thin filaments.
- A.
  
  I band
- B.
  
  A band
- C.
  
  H zone
- D.
  
  Both I band and A band
- E.
  
  All of these answer choices are correct
12.

Which of the following contain thick filament?
- A.
  
  Zone of overlap
- B.
  
  A band
- C.
  
  H zone
- D.
  
  Both A band and H zone
- E.
  
  All of the above
13.

Myofibrils contain
- A.
  
  Contractile proteins.
- B.
  
  Regulatory proteins.
- C.
  
  Structural proteins.
- D.
  
  All of these answers are correct.
- E.
  
  None of these answers are correct.
14.

Which of the following functions as a motor protein in all three types of muscle tissue?
- A.
  
  Actin
- B.
  
  Myosin
- C.
  
  Troponin
- D.
  
  Titin
- E.
  
  Tropomyosin
15.

What regulatory proteins can be found on an actin molecule?
- A.
  
  Troponin and titin
- B.
  
  Tropomyosin and troponin
- C.
  
  Myosin and titin
- D.
  
  Titin and tropomyosin
- E.
  
  Tropomyosin and myosin
16.

Titin is found in a sarcomere
- A.
  
  The A band only
- B.
  
  The H zone only
- C.
  
  The zone of overlap only
- D.
  
  From M line to Z disc
- E.
  
  The I band only
17.

Which of the following is used to reinforce the sarcolemma?
- A.
  
  Troponin
- B.
  
  Tropomyosin
- C.
  
  Myosin
- D.
  
  Actin
- E.
  
  Dystrophin
18.

In the sliding filament mechanism, the thin filament is being pulled towards the
- A.
  
  Z disc
- B.
  
  H zone
- C.
  
  M line
- D.
  
  A band
- E.
  
  I band
19.

The sarcoplasmic reticulum releases calcium ions into the cytosol
- A.
  
  At the beginning of a contraction
- B.
  
  In response to acetylcholine binding to Ca2+ release channels.
- C.
  
  By active transport using Ca2+ pumps in the SR membrane.
- D.
  
  After the contraction ends.
- E.
  
  All of these answers are correct.
20.

What energizes the myosin head?
- A.
  
  The actin filaments
- B.
  
  Calcium ions
- C.
  
  Potassium ions
- D.
  
  ATP hydrolysis reaction
- E.
  
  ADP synthesis
21.

What is needed for the contraction cycle to continue?
- A.
  
  ATP and acetylcholine (ACh)
- B.
  
  Calcium ions and ATP
- C.
  
  ACh and potassium ions
- D.
  
  Sodium ions and ATP
- E.
  
  Calcium and ACh
22.

The signal to excite a muscle cell must cross the neuromuscular junction by the diffusion of acetylcholine across the
- A.
  
  Node of Ranvier
- B.
  
  Synaptic cleft
- C.
  
  Sarcolemma
- D.
  
  Synaptic end bulb
- E.
  
  Transverse tubule
23.

Creatine phosphate and ATP together create enough energy for a muscle to contract for
- A.
  
  15 seconds.
- B.
  
  15 minutes.
- C.
  
  1.5 minutes.
- D.
  
  5 seconds.
- E.
  
  One minute.
24.

This consists of a somatic motor neuron plus all the skeletal muscle fibers it stimulates.
- A.
  
  Sarcomere
- B.
  
  Motor unit
- C.
  
  Neuromuscular junction
- D.
  
  Muscle unit
- E.
  
  Multi-unit smooth muscle
25.

This is a brief contraction of all muscle fibers in a motor unit in response to a single action potential.
- A.
  
  Isometric contraction.
- B.
  
  Isotonic contraction.
- C.
  
  Tetany.
- D.
  
  Refractory period.
- E.
  
  Twitch contraction.