Bio Exam #3

Front 1

60%-70% of CO2 is transported in the blood as CO2

Back 1

Bicarbonate

Front 2

Ventricular contraction is called

Back 2

Systole

Front 3

In the mammalian lung, oxygenand carbon dioxide occurs in the ____ which are terminal sac-like structures

Back 3

Alveoli

Front 4

___-Binding is the term used to describe the changing nature of oxygen binding affinity as a function of oxygen saturation of hemoglobin

Back 4

Cooperative

Front 5

The resting membrane potentia is approximately

Back 5

-70 mV

Front 6

The contractile unit of skeletal muscle is termed the

Back 6

Sarcomere

Front 7

In an ECG tracing, the repolarization of the atria is represented by

Back 7

None of these

Front 8

Normal adult human blood pressure is

Back 8

120/80

Front 9

A thick layer of smooth muscle is characteristic of an

Back 9

Artery

Front 10

A single-circuit circulatory system is found in

Back 10

Fish

Front 11

This animal possesses a four-chambered heart with 2 right aortae

Back 11

Crocodile

Front 12

A patient with a mutation resulting in decreased levels of surfactant would likely present with

Back 12

Labored ventilation

Front 13

The pulmocutaneous circuit is characteristic of the

Back 13

Amphibians

Front 14

Solids and liquids are prevented from entering the trachea by the

Back 14

Epiglottis

Front 15

Air enters the avian parabronchi from the

Back 15

Posterior air sacs

Front 16

The greatest sensitivity of hemoglobin to changes in oxygen concentration is found as blood

Back 16

Enters tissues

Front 17

Countercurrent circulation is a strategy to optimize which is variable in Fick's law

Back 17

Delta c

Front 18

In fish, the afferent artery

Back 18

Carries deoxygenated blood to the gills

Front 19

In mammals, deoxygenated blood is pumped out of the heart into the

Back 19

Pulmonary trunk

Front 20

The oxygen-binding efficiency of hemoglobin decreases as

Back 20

CO2 increases

Front 21

In skeletal muscle at rest, Ca2+ levels in the sarcoplasm are low due to

Back 21

The action of SR Ca2+ ATPases

Front 22

In order for skeletal muscle to contract, Ca2+ must bind to

Back 22

Troponin

Front 23

On the skeletal muscle membrane, an action potential can be initiated by the action of a motor neuron. Which neurotransmitter is released by the motor neuron

Back 23

Acetylcholine

Front 24

When ATP binds myosin, what immediately occurs

Back 24

Myosin releases actin

Front 25

As CO2 enters the erthrocyte, most of it is enzymatically converted to

Back 25

Carbonic Acid

Front 26

At resting membrane potential, the driving forces on a Na+ ion include

Back 26

A chemical gradient and an electrical gradient

Front 27

Action potentials are propagated along the

Back 27

Axon

Front 28

The role of the T-tubule is

Back 28

To propagate the action potential along terminal cisternae of the SR

Front 29

Deoxygenated blood mixes with oxygenated blood in the heart of

Back 29

Amphibians

Front 30

The following mamalian muscles aid in inspiration (inhalation)

Back 30

External intercostals, and diaphragm

Front 31

The final reaction in blood clotting is

Back 31

Fibrinogen to fibrin

Front 32

ADP is released from myosin

Back 32

Immediately after myosin has pulled actin and returned to the "uncocked state"

Front 33

Blood exiting from the gills is circulated through

Back 33

The systemic circulation

Front 34

Plasma includes

Back 34

Water, electrolytes, and proteins

Front 35

Diastole

Back 35

The phase of the cardiac in which the cardiac muscle is relaxed

Front 36

QRS complex

Back 36

Part of the ECG, it indicates the electrical happenings of the heart during ventricular depolarization

Front 37

Hemoglobin

Back 37

Primary oxygen transporter found in RBC

Front 38

Vein

Back 38

Blood vessel that brings blood back to the heart. Is low pressure and often flaccid and contains valves