BIOS 251 Exam 3 Review: Muscular System & Nervous System Fundamentals

Page 1 of 30


EXAM 3: BIOS 251 / BIOS251 (LATEST

UPDATES STUDY BUNDLE PACKAGE WITH SOLUTIONS)

ANATOMY AND PHYSIOLOGY I WITH LAB |

QUESTIONS & ANSWERS | GRADE A | 100%

CORRECT - CHAMBERLAIN

Cardiac output is determined by what two variables?

A) stroke volume and ejection fraction

B) heart rate and ejection fraction

C) end-diastolic volume and end-systolic volume

D) heart rate and stroke volume

E) preload and afterload

.....ANSWER.....D

,Page 2 of 30


Regulation of the heart (or any organ or tissue) by neural input,

circulating hormones, or any other factor originating from outside

the organ is referred to as ________ control.

A) intrinsic

B) neurogenic

C) extrinsic

D) voluntary

E) myogenic

.....ANSWER.....C

Which of the following structures is poorly innervated by the

parasympathetic nervous system and, therefore, an increase in

parasympathetic activity has little effect on this structure?

A) ventricles

B) conduction pathway

, Page 3 of 30


C) sinoatrial node

D) Purkinje fibers

E) atrioventricular node

.....ANSWER.....A

The SA node is innervated by the

A) sympathetic nervous system only.

B) somatic nervous system only.

C) parasympathetic nervous system only.

D) sympathetic and parasympathetic nervous systems.

E) sympathetic, parasympathetic, and somatic nervous systems.

.....ANSWER.....D

Which of the following is an effect of parasympathetic activity to

the heart?