WCU - PHYS 261 FINAL EXAM LATEST UPDATED 2026/2027 CORRECT VERIFIED 100% PASS (Graded A+)

WCU - PHYS 261 FINAL EXAM LATEST UPDATED
2026/2027 CORRECT VERIFIED 100% PASS
(Graded A+)

A patient had an opioid overdose causing respiratory depression. Which
would you expect for kidney compensation? - VERIFIED UPDATED ANSWER -
Increased hydrogen ion excretion and increased bicarbonate ion
reabsorption.


What happens to the heart rate parameter once blood pressure drops? -
VERIFIED UPDATED ANSWER - The heart rate goes back up due to
stimulation of the SA node by the SNS.


What happens to the blood volume parameter once blood pressure drops?
- VERIFIED UPDATED ANSWER - Blood volume is increased by activating the
renin-angiotensin-aldosterone system, which produces more blood.


What happens to the stroke volume parameter once blood pressure
drops? - VERIFIED UPDATED ANSWER - Stroke volume increases due to
increased venous return, which raises EDV, SV, CO, and BP.

,What happens to the peripheral resistance parameter once blood
pressure drops? - VERIFIED UPDATED ANSWER - Peripheral resistance
increases due to vasoconstriction or increased blood viscosity, which
raises BP.


What are the results of low blood pressure and high blood pressure? -
VERIFIED UPDATED ANSWER - Low blood pressure leads to low blood flow,
hypoxia, and necrosis. High blood pressure damages arteries and can
lead to organ damage and increased heart workload, potentially causing a
heart attack.


What detects blood pressure and where are they located? - VERIFIED
UPDATED ANSWER - Baroreceptors located in the carotid artery, aortic
arch, and kidney detect blood pressure.


The volume of blood pumped out of the heart from one ventricle during
one contraction - VERIFIED UPDATED ANSWER - Stroke Volume (SV)


The rapid depolarization phase of the action potentials of myocardial
contractile cells is due to which ion(s)? - VERIFIED UPDATED ANSWER -
Na+ only

,The volume of blood in the ventricle available to be pumped out of the
heart during one contraction - VERIFIED UPDATED ANSWER - End- diastolic
volume (EDV)


The volume of blood left in the ventricle after it contracts - VERIFIED
UPDATED ANSWER - End- systolic volume (ESV)


The volume of blood ejected from each ventricle during a contraction -
VERIFIED UPDATED ANSWER - Stroke volume (SV)


What happens when calcium binds to troponin? - VERIFIED UPDATED
ANSWER - Tropomyosin is pulled away from the myosin-binding site on
actin.


The driving force for blood flow is a(n) ________ gradient. - VERIFIED
UPDATED ANSWER - pressure


Which would NOT cause an increase in blood pressure? - VERIFIED
UPDATED ANSWER - a decrease in cardiac output


Match the name of the wave with the correlated event:

, ventricular depolarization - VERIFIED UPDATED ANSWER - QRS complex


The function of transverse tubules is to - VERIFIED UPDATED ANSWER -
rapidly conduct action potentials to the interior of the muscle fiber.


Which is greater:
A) blood pressure when the peripheral vessels constrict
B) blood pressure when the peripheral vessels dilate - VERIFIED UPDATED
ANSWER - A) blood pressure when the peripheral vessels constrict


The P wave of an ECG corresponds to - VERIFIED UPDATED ANSWER -
depolarization of the atria


The reflex that compliments a withdrawal reflex by making compensatory
adjustments on the opposite side of the body receiving the stimulus is the
- VERIFIED UPDATED ANSWER - crossed extensor reflex


Your instructor announces a pop quiz. Which would you expect? - VERIFIED
UPDATED ANSWER - Increased sympathetic signaling and increased
cardiac output