Human Anatomy and Physiology Answers

Is temporal arch only restricted to reptilian skull?

What is temporal arch?

After a action potential is generated what causes the restoration of membrane potential from hyperpolarising phase to resting phase?

Thank you.

If a person has blood type A+, what proteins (antigens) are found on their red blood cell membranes?

a. A only
b. B only
c. A and B only
d. A and Rh factor only
e. B and Rh factor only

A patient has type B+ blood, and needs a transfusion. Which blood type(s) can she receive without risk of agglutination?

a. A+ and B+
b. B+ and O-
c. A- and B-
d. AB+ only
e. none of the above can be transfused safely

If a person has O+ blood, which antibodies will be found in their plasma?

a. none

b. anti O and anti Rh only

c. anti A and anti Rh only

d. anti B only

e. anti A and anti B only

Which of the following responses to a drop in blood pressure would raise blood pressure the fastest?

a. Increase cardiac contractility

b. Increase heart rate

c. Increase in vasoconstriction (and peripheral resistance)

d. Decrease in kidney filtration rate

e. All the above occur at about the same rate

As blood moves from the arterial end to the venous end of a capillary, net filtration pressure:

a. increases, as blood hydrostatic pressure rises

b. decreases, as blood hydrostatic pressure rises

c. decreases, as blood colloid osmotic pressure decreases

d. decreases, as blood hydrostatic pressure decreases

e. remains the same, as rises in blood osmotic pressure are offset by declines in tissue osmotic pressure

Which statement is accurate?

a. Filtration dominates at the arterial end of a capillary bed, and is driven by osmotic pressure

b. Filtration dominates at the arterial end of a capillary bed, and is driven by hydrostatic pressure

c. Filtration dominates at the venous end of a capillary bed, and is driven by osmotic pressure

d. Filtration dominates at the venous end of a capillary bed, and is driven by hydrostatic pressure

Just prior to atrial systole:

a. all four chambers are at rest and the AV valves are open

b. all four chambers are at rest and the AV valves are closed

c. all four chambers are contracting and all valves are open

d. both ventricles are contracting and blood is being ejected into the major arteries

e. both atria are contracting and blood is being ejected into the major arteries