1. Which of these is found in the fish pectoral girdle but not humans? clavicle

Question

1. Which of these is found in the fish pectoral girdle but not humans?

clavicle

scapula

cleithrum

coracoid

2. The lateral boundary of the cubital fossa is formed by the:

pronator teres muscle

tendon of the biceps muscle

flexor carpi radialis muscle

brachialis muscle

brachioradialis muscle

3. The acronym CIA stands for "Compartment", "Innervation", and "Action" for a muscle. Which of the following is the CIA for the Coracobrachialis muscle?

a. Posterior compartment of the brachium
I: Radial N
A: Extensor of forearm; Long head resists dislocation of humerus

B. Posterior compartment of the brachium
I: Radial N
A: Assists triceps in extending forearm, stabilizes elbow joint

C. Anterior compartment of the brachium
I: Musculocutaneous N
A: helps flex & adduct arm; resists dislocation of shoulder

D. Anterior compartment of the brachium
I: Musculocutaneous N
A: Supinates forearm & flexes forearm/arm
Short head resists dislocation of shoulder

clavicle

scapula

cleithrum

coracoid

Explanation / Answer

1. C. cleithrum

this bone is totally absent in humans

2.e.brachioradialis muscle

medial border of brachioradialis muscle forms lateral border of cubital fossa

3.C.

anterior compartment of brachium, Musculocutaneous N.,hepls flexs and adduct arm,resist dislocation of shoulder.

this muscle mainly helps shoulder movement

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