2/25/25, 11:19 AM BIOS 251 Anatomy and Physiology Exam 3 updated 2025 with correct answers Flashcards | Quizlet
BIOS 251 Anatomy and Physiology Exam 3
updated 2025 with correct answers
Save
Terms in this set (56)
Cardiac output is D
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
https://quizlet.com/1010445478/bios-251-anatomy-and-physiology-exam-3-updated-2025-with-correct-answers-flash-cards/?new 1/22
,2/25/25, 11:19 AM BIOS 251 Anatomy and Physiology Exam 3 updated 2025 with correct answers Flashcards | Quizlet
Regulation of the heart (or C
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
Which of the following A
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
C) sinoatrial node
D) Purkinje fibers
E) atrioventricular node
https://quizlet.com/1010445478/bios-251-anatomy-and-physiology-exam-3-updated-2025-with-correct-answers-flash-cards/?new 2/22
, 2/25/25, 11:19 AM BIOS 251 Anatomy and Physiology Exam 3 updated 2025 with correct answers Flashcards | Quizlet
The SA node is innervated D
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.
Which of the following is A
an effect of
parasympathetic activity
to the heart?
A) The rate of
spontaneous
depolarization in SA nodal
cells decreases.
B) SA nodal cells are
depolarized.
C) Heart rate is increased.
D) cAMP is activated.
E) Postganglionic neurons
release acetylcholine,
which binds to nicotinic
cholinergic receptors in
the SA node.
https://quizlet.com/1010445478/bios-251-anatomy-and-physiology-exam-3-updated-2025-with-correct-answers-flash-cards/?new 3/22
BIOS 251 Anatomy and Physiology Exam 3
updated 2025 with correct answers
Save
Terms in this set (56)
Cardiac output is D
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
https://quizlet.com/1010445478/bios-251-anatomy-and-physiology-exam-3-updated-2025-with-correct-answers-flash-cards/?new 1/22
,2/25/25, 11:19 AM BIOS 251 Anatomy and Physiology Exam 3 updated 2025 with correct answers Flashcards | Quizlet
Regulation of the heart (or C
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
Which of the following A
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
C) sinoatrial node
D) Purkinje fibers
E) atrioventricular node
https://quizlet.com/1010445478/bios-251-anatomy-and-physiology-exam-3-updated-2025-with-correct-answers-flash-cards/?new 2/22
, 2/25/25, 11:19 AM BIOS 251 Anatomy and Physiology Exam 3 updated 2025 with correct answers Flashcards | Quizlet
The SA node is innervated D
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.
Which of the following is A
an effect of
parasympathetic activity
to the heart?
A) The rate of
spontaneous
depolarization in SA nodal
cells decreases.
B) SA nodal cells are
depolarized.
C) Heart rate is increased.
D) cAMP is activated.
E) Postganglionic neurons
release acetylcholine,
which binds to nicotinic
cholinergic receptors in
the SA node.
https://quizlet.com/1010445478/bios-251-anatomy-and-physiology-exam-3-updated-2025-with-correct-answers-flash-cards/?new 3/22
