Learning Assessment Quizzes (1-3)

Question 1

Circulating plasma directly interacts with the interstitial fluid across walls of capillary vessels to

Answer 1

maintain homeostasis

Question 2

The mechanism responsible for the movement of water between the interstitial fluid compartment and the intracellular fluid compartment is

Answer 2

Osmotic pressure

Question 3

__________ and ___________ determine movement of water between intravascular (plasma) fluid compartment and interstitial fluid compartment.

Answer 3

Osmotic pressure and hydrostatic pressure

Question 4

What type(s) of vessels are known as conductance vessels.

Answer 4

Veins and Arteries

Question 5

In a sample of whole blood, hormones and antibodies, as wells as nutrients such as glucose, amino acids, and electrolytes are carried in the

Answer 5

Plasma

Question 6

Characteristics of the __________ circulation include lower pressures and resistance through the vessels.

Answer 6

Pulmonary

Question 7

Within the systemic circulation, organs are arranged primarily in

Answer 7

Parallel

Question 8

Maintaining homeostasis of the internal environment relies on which of the following

Answer 8

Maintaining adequate blood flow thought the tissue capillaries.

Optimizing the chemical composition of the blood for the interstitial fluid.

Question 9

Distribution of blood flow to the various capillary beds throughout the body is influenced by

Answer 9

local metabolism

Question 10

When a person becomes dehydrated, water is generally lost from the ________ compartment first.

Answer 10

Interstitial, Extracellular compartment

Question 11

According to Poiseuille’s Law: blood flow to individual organs is primarily regulated by changes is what?

Answer 11

Vessel radius

Question 12

In an attempt to win the Tour de France, you infused additional red blood cells (no plasma) immediately before the race. Using only what we’ve talked about so far, what would be the impact on blood flow?

Answer 12

Blood flow would be reduced due to increased viscosity.

Question 13

When looking at the cardiovascular system as a single unit, the pressure difference (∆P) across the system is the difference between

Answer 13

the aortic pressure and the right atrium pressure.

Question 14

The vessels responsible for regulating blood flow to tissues are the

Answer 14

Arterioles

Question 15

The highest resistance to blood flow occurs

Answer 15

between the blood and the endothelial cells

Question 16

Which type of cardiac myocyte is generates a fast response action potential?

Answer 16

Contractile myocytes

Question 17

In nodal/pacemaker cells, the diastolic potential is established by

Answer 17

K+ leaking out of the cell

Question 18

The figure below represents a ___________ response action potential and the rapid rise during depolarization is due to the influx of _____________.

Answer 18

Slow; Calcium

Question 19

In Phase 3 of a fast response action potential, repolarization occurs with the opening of which type of channels?

Answer 19

Voltage-gated potassium delayed rectifier channels

Question 20

Using the figure below, identify the phases with the corresponding letter.

Answer 20

4,0,1,2,3

Question 21

What happens when an intervention promotes early activation (i.e. opening) of the delayed rectifier potassium channels in a cardiac contractile cell?

Answer 21

The action potential duration is decreased.

Question 22

The importance of the Plateau Phase of a fast action potential is to

Answer 22

prevent tetany of cardiac myocytes.

Question 23

The type of action potential varies throughout the heart. This is primarily due to

Answer 23

varying type and number of ion channels present in the cells.

Question 24

T or F: In order for a cardiac myocyte to contract, an electrical event (i.e. a depolarization) must always precede the mechanical (i.e. fiber shortening) event.

Answer 24

True

Question 25

Conductance vessels that return blood to the heart

Answer 25

Veins and Venules

Question 26

Conductance vessels that distribute blood from the heart

Answer 26

Arteries