BIOS 255 – Anatomy & Physiology III with Lab
year one 2024-2025 100 Practice Questions
with Answers 100% guaranteed pass already
graded A plus
Question 1
Why does the SA node act as the heart's pacemaker?
A. Because it has poor cholinergic innervation
B. Because it has rich sympathetic innervations
C. Because of its capability of generating impulses
D. Because it generates impulses at the highest rate
✅
Question 2
Rise in carotid sinus pressure leads to:
A. Reflex hypercapnia
B. Reflex hyperpnea
C. Reflex bradycardia ✅
D. Reflex tachycardia
Question 3
The ventricular muscles accept impulses directly from:
A. AV node
B. Bundle of His
C. Right and left bundle branches
D. Purkinje system ✅
,Question 4
What effect does adrenaline NOT have on the heart?
A. Increases oxygen uptake
B. Increases contraction force
C. Decreases myocardial irritability ✅
D. Increases heart rate
Question 5
The primary neurotransmitter involved in the
parasympathetic nervous system is:
A. Norepinephrine
B. Acetylcholine ✅
C. Dopamine
D. Serotonin
Question 6
Where is the cerebellum located?
A. Forebrain
B. Midbrain
C. Hindbrain ✅
D. Brainstem
Question 7
The function of hemoglobin in red blood cells is to:
A. Produce white blood cells
B. Transport oxygen ✅
C. Digest nutrients
D. Produce energy
, Question 8
Which part of the brain regulates breathing?
A. Cerebellum
B. Medulla oblongata ✅
C. Thalamus
D. Hypothalamus
Question 9
The structure that prevents backflow of blood from the
left ventricle to the left atrium is called:
A. Tricuspid valve
B. Mitral valve ✅
C. Pulmonary valve
D. Aortic valve
Question 10
The anatomical position is best described as:
A. Lying prone
B. Lying supine
C. Standing with ventral surface displayed ✅
D. Standing with arms and legs abducted
Question 11
Which body cavity contains the heart and lungs?
A. Dorsal cavity
B. Ventral cavity ✅
C. Abdominal cavity
D. Cranial cavity
year one 2024-2025 100 Practice Questions
with Answers 100% guaranteed pass already
graded A plus
Question 1
Why does the SA node act as the heart's pacemaker?
A. Because it has poor cholinergic innervation
B. Because it has rich sympathetic innervations
C. Because of its capability of generating impulses
D. Because it generates impulses at the highest rate
✅
Question 2
Rise in carotid sinus pressure leads to:
A. Reflex hypercapnia
B. Reflex hyperpnea
C. Reflex bradycardia ✅
D. Reflex tachycardia
Question 3
The ventricular muscles accept impulses directly from:
A. AV node
B. Bundle of His
C. Right and left bundle branches
D. Purkinje system ✅
,Question 4
What effect does adrenaline NOT have on the heart?
A. Increases oxygen uptake
B. Increases contraction force
C. Decreases myocardial irritability ✅
D. Increases heart rate
Question 5
The primary neurotransmitter involved in the
parasympathetic nervous system is:
A. Norepinephrine
B. Acetylcholine ✅
C. Dopamine
D. Serotonin
Question 6
Where is the cerebellum located?
A. Forebrain
B. Midbrain
C. Hindbrain ✅
D. Brainstem
Question 7
The function of hemoglobin in red blood cells is to:
A. Produce white blood cells
B. Transport oxygen ✅
C. Digest nutrients
D. Produce energy
, Question 8
Which part of the brain regulates breathing?
A. Cerebellum
B. Medulla oblongata ✅
C. Thalamus
D. Hypothalamus
Question 9
The structure that prevents backflow of blood from the
left ventricle to the left atrium is called:
A. Tricuspid valve
B. Mitral valve ✅
C. Pulmonary valve
D. Aortic valve
Question 10
The anatomical position is best described as:
A. Lying prone
B. Lying supine
C. Standing with ventral surface displayed ✅
D. Standing with arms and legs abducted
Question 11
Which body cavity contains the heart and lungs?
A. Dorsal cavity
B. Ventral cavity ✅
C. Abdominal cavity
D. Cranial cavity
