Necturus Textbook questions

Question 1

a distinct ——- —– occurs on the ventral side of the neck where the trunk merges with the head.

Answer 1

gular fold

Question 2

what is the muscle name that can be found ventrally between the fore-limbs and has a fan shape?

Answer 2

pectoralis

Question 3

what muscle is just caudal to the pectoralis and runs forward interrupted at regular intervals by myosepta?

Answer 3

rectus abdominus

Question 4

the —– —– is the connective tissue line that runs down the middle of the rectus abdominus at the central midline

Answer 4

linea alba

Question 5

just anterior to the pectorlalis is what muscle?

Answer 5

supracoracoideus

Question 6

the ventral neck muscle is called? remember it lacks the linea alba

Answer 6

rectus cervicis

Question 7

what small, short muscle lies betweens the supracoracoideus and procoracohumeralis?

Answer 7

omoarcual

Question 8

what are the two arm muscles?

Answer 8

humeroantebrachialis (anterior)

Coracobrachialis (posterior)

Question 9

if you make a slit on the median raphe and open the flaps what is beneath?

Answer 9

the pair slender geniohyoid

Question 10

lateral to the geniohyoids is what?

Answer 10

the large, paired branchiohyoideus

Question 11

deep between the gill arches is what muscle?

Answer 11

subarcuals

Question 12

what are the 2 muscles above the external gill slits?

Answer 12

Levators arcuum (anteror) and inserts above the arches
Dilator Laryngis is posterior and inserts deeper

Question 13

above the procoracohumeralis and ventral to the dilator laryngis is 4 muscles starting with the one closest to procoracohumeralis

Answer 13

1. pectoriscapularis
2. cucullaris
3. dorsalis scapulae
4. latissimus dorsi

Question 14

what is the muscle on the dorsal surface of the upper arm?

Answer 14

triceps brachii

Question 15

along the dorsal and anterior margin of the branchiohyodeus is the lateral edge of the ——— ——–

Answer 15

depressor mandibulae

Question 16

the adductor mandibulae is found where and can be divided into what 2 muscles?

Answer 16

is found on the top of the head between the eyes and caudal to the eyes.

Levator mandibulae externus is larger
Levator mandibulae anterior is more dorsal on the head and positioned between the 2 eyes

Question 17

the epaxial muscle of the trunk or above the horizontal septum is what?

Answer 17

dorsalis trunci

Question 18

superficially the muscle hypaxial or below the horizontal septum is called what?

Answer 18

external oblique

Question 19

the muscle of the hing leg that is closest to the tail is called what?

Answer 19

pubio-ischio-tibialis

Question 20

the two muscles surrounding the cloacal gland is called what?

Answer 20

ischiocaudalis is the most inner

Caudocruralis is the most outer