Embryology

Question 0

The morula develops into a

Answer 0

Blastocyst, a hollow fluid filled ball

Question 1

At the beginning of a zygotes development the size _____

Answer 1

Stays the same

Question 2

Trophoblast gives rise to the

Answer 2

Chorion/placenta

Question 3

______ help the blastula implant into the endometrium

Answer 3

Proteolytic enzymes

Question 4

Invagination called archenteron develops into the

Answer 4

Gut

Question 5

Bastopore develops into the ____ in deuterosomes such as humans

Answer 5

Anus

Question 6

Blastocoele develops into ____ in protosomes

Answer 6

Mouth

Question 7

How many days to gastrula

Answer 7

14

Question 8

Yolk sac is the site of

Answer 8

Early blood vessel development

Question 9

Chorionic villi

Answer 9

Grow into the placenta and support mother to fetus gas exchange

Question 10

Foremen ovale

Answer 10

Takes blood from the right to left atria

Question 11

Ductus arteriosus

Answer 11

Puts leftover blood from pulmonary artery to aorta

Question 12

Ductus venosus

Answer 12

Carries blood from placenta to inferior vena cava

Question 13

What develops in first trimester

Answer 13

Organs, heartbeat, skeleton, brain, and gonads

Question 14

Second trimester develops

Answer 14

Growth, face, toes

Question 15

Third trimester develops

Answer 15

Growth, brain, antibodies

Question 16

Cartilage develops from

Answer 16

Chondrocytes

Question 17

Axial vs appendicular

Answer 17

Axial head and spine, appendicular is arms legs and pelvis

Question 18

Bone is from what germ layer

Answer 18

Mesoderm

Question 19

Charactaristics of spongy bone

Answer 19

Has bony spicules called trabiculae

Question 20

Periosteum

Answer 20

Surrounds bone as protection

Question 21

A bone unit is a

Answer 21

Osteon or Haversian canal

Question 22

_____ surround Haversian canal

Answer 22

Lamella

Question 23

What does Haversian canal contain

Answer 23

Blood vessels, nerve fibers, and lymph

Question 24

Lacuna

Answer 24

House osteocytes in spaces between canals

Question 25

How does estrogen affect bones

Answer 25

Stimulates osteoblast activity

Question 26

Ligaments connect

Answer 26

Bone to bone

Question 27

Muscle is innervated by which nervous system

Answer 27

Somatic

Question 28

Sarcolemma

Answer 28

Capable of an action potential because T tubules allow for ions to flow

Question 29

What mineral is common in sarcoplasmic reticulum

Answer 29

Ca2+

Question 30

z line is

Answer 30

Boundary of sarcomere

Question 31

A band consists of

Answer 31

Thick or myosin only

Question 32

M line

Answer 32

Runs down center of sarcomere

Question 33

I band

Answer 33

Region containing only thin filaments

Question 34

H zone

Answer 34

Contains only thick myosin

Question 35

Which band remains the same size through contraction

Answer 35

A band

Question 36

Ca2+ in sarcoplasmic reticulum

Answer 36

Release ca2+ and depolarize. Ca2+ binds to troponin causing tropomyosin to shift exposing the myosin binding site on actin

Question 37

What provides the energy for the muscle power stroke

Answer 37

ATPase

Question 38

Power stroke is caused by

Answer 38

When myosin binds, ADP and Pi are too causing power stroke

Question 39

Once Ca2+ leaves on muscle

Answer 39

So do ADP and Pi and an ATP joins leading to detachment from actin and put back myosin to its relaxed position

Question 40

Without Ca2+ in muscle

Answer 40

Myosin can't bind

Question 41

Without ATP in muscle

Answer 41

Myosin can't dissociate

Question 42

Tetanus in muscle

Answer 42

When a muscle doesn't have enough time to relax = muscle fatigue

Question 43

Smooth muscle is controlled by which nervous system

Answer 43

Autonomic

Question 44

Nucleus situation in smooth muscle

Answer 44

Only one

Question 45

Does smooth muscle respond to nervous signals?

Answer 45

Yes but it doesn't need them to contract

Question 46

Three types of connective tissue and their function

Answer 46

Collagen for strength Elastin for resilience Recticular for connecting

Question 47

Ligaments and tendons are made of what

Answer 47

Collagen

Question 48

Characteristics of cardiac muscle

Answer 48

Involuntary, striated, uninucleate, Ca required. Has myogenic activity

Question 49

Creatine phosphate

Answer 49

A storage system for excess ATP