Exam 3

Question 1

what is the blood supply to the spongy body of penis

Answer 1

dorsal artery of penis

Question 2

what is the blood supply to the cavernous body of the penis

Answer 2

deep artery of penis

–think caves are deep, deep artery

Question 3

what parts of the penis does the artery of the bulb supply

Answer 3

spongy body and bulbous glandis

Question 4

what is the blood supply to the scrotum

Answer 4

external pudendal artery

Question 5

what is the innervation to the scrotum (LIIG)ma

Answer 5

lumbar nerves
iliohypogastric nerve
ilioinguinal nerve
genitofemoral nerve

Question 6

what is the purpose of the efferent ducts

Answer 6

they connect the rete testis with the initial section of the epididymis

Question 7

what is contained within the spermatic cord

Answer 7

ductus deferens and nerve, testicular blood and lymph vessels, visceral vaginal tunic

Question 8

what are the rete testis

Answer 8

bundled up collection of seminiferous tubules

Question 9

what is the innervation of the testes

Answer 9

caudal mesenteric plexus

Question 10

what muscles are responsible for the warming of the testes, what about the cooling?

Answer 10

warming = cremaster and dartos
cooling = scrotal skin and pampiniform plexus

Question 11

what sex glands do horses and cattle have

Answer 11

all of them
A Very Big Penis

Question 11

what sex glands do pigs have

Answer 11

Very Big Penis
Vesticular glands
Bulbourethral glands
Prostate

Question 11

what sex glands do cats have

Answer 11

A Big Penis
Ampullary glands
Bulbourethral glands
Prostate

Question 11

what sex glands do dogs have

Answer 11

A penis
Ampullary glands
Prostate

Question 12

what sex gland produces secretions that maintain sperm vitality

Answer 12

ampullary glands

Question 13

what happens to accessory sex glands in the absence of androgens

Answer 13

they atrophy

Question 14

hindgut pain follows what pathway

Answer 14

parasympathetic

Question 15

hindgut non-pain follows what pathway

Answer 15

PELVIC SPLANCHNIC

Question 16

foregut and midgut non-pain follow what pathway

Answer 16

vagus nerve

Question 17

preganglionic parasympathetics travel to the body via

Answer 17

vagus nerve

Question 18

what cell bodies are found in the dorsal root ganglion of S2,S3,S4?

Answer 18

pain, non-pain and sensory somatic

Question 19

where do all preganglionic sympathetics originate

Answer 19

lateral horn of T1-L4

Question 20

Role of parasympathetics in the enteric NS

Answer 20

stimulate smooth muscle contraction and glandular secretion

Question 21

sympathetics in enteric NS

Answer 21

inhibit SM contractions, vasoconstriction

Question 22

location of thorax preganglionic sympathetics

Answer 22

T1-L5 (Cardiopulmonary splanchnic from C1-T5)

Question 23

location of abdomen preganglionic sympathetics

Answer 23

T5-L4 (AP splanchnic from T5-end)

Question 24

for CP splanchnic nerve or if going to body wall, where does synapse occur

Answer 24

paravertebral ganglion

Question 25

where will abdominal pelvic splanchnic nerves synapse

Answer 25

outside of the chain at prevertebral ganglia

Question 26

where are preganglionic parasympathetic cell bodies found

Answer 26

brain

Question 27

preganglionic parasympathetic axons travel to the body via the

Answer 27

vagus nerve

Question 28

preganglionic axons travel via periarterial plexus then synapse where

Answer 28

in ganglia of organ to be innervated

Question 29

where do preganglionic parasympathetic cell bodies going to the hindgut and pelvic organs live

Answer 29

ventral horn of S2,S3,S4

Question 30

At S1, the abdominal pelvic nerve gets a new name…

Answer 30

sacral splanchnic nerves. sympathetic
pelvic splanchnic nerves. parasympathetic

Question 31

where does the vagus nerve end

Answer 31

end of the midgut

Question 32

except for the gonads, pelvic structures receive postganglionic sympathetics from ??

Answer 32

Hypogastric ganglion / plexus

Question 33

what do gonads receive sympathetic postganglionics from

Answer 33

cranial mesenteric ganglion

Question 34

nerve that carries preganglionic parasympathetics to the body cavity including thorax, foregut, midgut

Answer 34

vagus nerve

Question 35

nerve that carries parasympathetic innervation to organs of hindgut and pelvis, branches of ventral rami

Answer 35

pelvic splanchnic

Question 36

what is visceral non-pain associated with

Answer 36

stretch receptors in the wall of pelvic viscera

Question 37

pain from gonads follows what pathway

Answer 37

sympathetic pathway to the cranial mesenteric ganglion

Question 38

both pain and non-pain from the hindgut and pelvis follow what pathway

Answer 38

parasympathetic

Question 39

role of sympathetics and parasympathetics in the visceral plexus

Answer 39

sympathetic: keeps internal urethral sphincter closed

parasympathetic: inhibits sympathetics from keeping sphincter closed

Question 40

role of sympathetics and parasympathetics in the rectal plexus

Answer 40

sympathetics: maintain contraction of internal anal sphnicter

parasympathetics: inhibit sympathetic from contracting internal anal sphnicter

Question 41

role of sympathetics and parasympathetics in the prostatic plexus (males only)

Answer 41

sympathetic : causes ejaculation and vasoconstriction

parasympathetics: relaxation of smooth muscle and vasodilation to allow for erection

erection and ejaculation are controlled by both visceral and somatic NS

Question 42

parasympathetics role in erection

Answer 42

low PS activity to smooth muscles in AV shunt maintains flacid penis

high PS activity closes AV shunt, allows blood to pool in erectile tissue = erection

swelling of erectile tissue compresses veins which maintains erection

Question 43

what muscles do females constrict during tieing of mating

Answer 43

female constrictor vestibulae (ischiocavernous)

Question 44

what muscles do males constrict during tieing of mating

Answer 44

ischiourethralis