AP1 M5 exam

Question 1

(True or False) There are three types of muscle tissue found in the body.

Answer 1

True

Question 2

(True or False) Smooth and cardiac muscle tissue are both under voluntary control.

Answer 2

False

Question 3

(True or False) The musculocutaneous nerve is part of the central nervous system.

Answer 3

False

Question 4

(True or False) A motor signal is a signal that is sent from a muscle to the central nervous system.

Answer 4

False

Question 5

(True or False) The cervical plexus contains nerves that innervate the thigh.

Answer 5

False

Question 6

Ligaments connect which types of tissue?

Answer 6

Connect bone to bone

Question 7

Acetylcholine is what type of substance?

Answer 7

Neurotransmitter

Question 7

What must occur for a muscle contraction to stop?

Answer 7

Calcium ions must be pumped back into the sarcoplasmic reticulum

Question 8

During a muscle contraction which protein myofilament is pulled along?

Answer 8

Actin

Question 9

What is the name of the thick myofilament?

Answer 9

Myosin

Question 10

(options only A-?) Your patient sustained an injury to their facial nerve (CN VII). Which actions would be impaired?

Answer 10

B. Compress cheeks
C. Grin/grimace

This was the appriate option not that includes all actions involved

Question 11

A person sustained a back injury to the muscle group closest to the spine. What muscle group was injured?

Answer 11

Spinalis

Question 11

Your patient is having difficulty when asked to bring his chin to his chest. He is also having difficulty turning his face from side to side. What muscle is most likely impaired?

Answer 11

Sternocleidomastoid

Question 12

When a muscle contracts, the M lines within a sarcomere come closer together towards the Z line

Answer 12

True

Question 13

(True or False) The A band contains thin filaments.

Answer 13

True

Question 14

Which muscle contracts to enable the main effort required to stand on your toes?

Answer 14

Gastrocnemius

Question 15

When rectus femoris contracts, which bone is pulled anteriorly by this muscle?

Answer 15

Tibia

Question 16

When extensor digitorum contracts, what action(s) occurs?

Answer 16

B. Wrist extension
D. Extension of digits 2-5

Question 17

Contraction of ________ results in _________?

Answer 17

psoas major, hip flexion

Question 18

When superior gemellus contracts, what action(s) will not occur at the hip?

Answer 18

B. Internal rotation
E. Flexion

Question 19

Which muscle has origins on both the clavicle and scapula?

Answer 19

1. A (Deltoid)

Question 20

Which muscle is innervated by the thoracodorsal nerve?

Answer 20

Lats

Question 21

Describe what is meant by muscle fiber “cross-bridges”. What occurs to enable movement of the cross-bridges?

Answer 21

In the presence of calcium ions, portions of a myosin filament called cross-bridges bend backward and attach to an actin filament. After attaching to the actin filament, the cross-bridges bend forward, and the actin filament is pulled along. The cross-bridges attach and detach some fifty to 100 times as the thin filaments are pulled to the center of a sarcomere. ATP is needed on a cellular level for the myosin to pull actin along.