HLTH 221
Applied Human A & P I
Midterms Exam Review (Qns & Ans)
2025
Multiple Choice Questions:
1. Which of the following structures is primarily responsible for
regulating the autonomic nervous system?
a) Thalamus
b) Hypothalamus
c) Amygdala
d) Hippocampus
ANS: b) Hypothalamus
©/2025
, Rationale: The hypothalamus plays a significant role in
controlling various autonomic processes, including temperature
regulation, hunger, and hormonal balance.
2. During muscle contraction, which ion is released from the
sarcoplasmic reticulum to facilitate this process?
a) Sodium
b) Potassium
c) Calcium
d) Magnesium
ANS: c) Calcium
Rationale: Calcium ions are crucial for initiating muscle
contraction by binding to troponin, which allows the actin-myosin
interaction.
3. Which type of epithelial tissue is primarily found lining the
alveoli of the lungs?
a) Simple columnar epithelium
b) Stratified squamous epithelium
c) Simple squamous epithelium
d) Pseudostratified columnar epithelium
ANS: c) Simple squamous epithelium
©/2025
, Rationale: The simple squamous epithelium provides a thin
barrier conducive to efficient gas exchange in the alveoli.
4. What is the primary function of the loop of Henle in the
nephron?
a) Filtration of blood
b) Selective reabsorption of water and solutes
c) Secretion of waste products
d) Formation of red blood cells
ANS: b) Selective reabsorption of water and solutes
Rationale: The loop of Henle plays a critical role in
concentrating urine by reabsorbing water and salts.
5. The cardiac output is determined by which of the following
factors?
a) Heart rate only
b) Stroke volume only
c) Total blood volume
d) Both heart rate and stroke volume
ANS: d) Both heart rate and stroke volume
©/2025
, Rationale: Cardiac output is calculated as the product of heart
rate and stroke volume, reflecting the heart’s efficiency and
capacity.
Fill-in-the-Blank Questions:
6. The ____________ is known as the pacemaker of the heart,
initiating the cardiac cycle.
ANS: Sinoatrial (SA) node
Rationale: The SA node sets the rhythm of the heartbeat by
generating electrical impulses that spread throughout the heart
muscle.
7. In the human body, the hormone responsible for lowering
blood glucose levels is ____________.
ANS: Insulin
Rationale: Insulin, secreted by the pancreas, facilitates the
uptake of glucose into cells, thereby lowering blood glucose
levels.
8. The point where a nerve and muscle fiber connect is known as
the ____________.
ANS: Neuromuscular junction
©/2025
Applied Human A & P I
Midterms Exam Review (Qns & Ans)
2025
Multiple Choice Questions:
1. Which of the following structures is primarily responsible for
regulating the autonomic nervous system?
a) Thalamus
b) Hypothalamus
c) Amygdala
d) Hippocampus
ANS: b) Hypothalamus
©/2025
, Rationale: The hypothalamus plays a significant role in
controlling various autonomic processes, including temperature
regulation, hunger, and hormonal balance.
2. During muscle contraction, which ion is released from the
sarcoplasmic reticulum to facilitate this process?
a) Sodium
b) Potassium
c) Calcium
d) Magnesium
ANS: c) Calcium
Rationale: Calcium ions are crucial for initiating muscle
contraction by binding to troponin, which allows the actin-myosin
interaction.
3. Which type of epithelial tissue is primarily found lining the
alveoli of the lungs?
a) Simple columnar epithelium
b) Stratified squamous epithelium
c) Simple squamous epithelium
d) Pseudostratified columnar epithelium
ANS: c) Simple squamous epithelium
©/2025
, Rationale: The simple squamous epithelium provides a thin
barrier conducive to efficient gas exchange in the alveoli.
4. What is the primary function of the loop of Henle in the
nephron?
a) Filtration of blood
b) Selective reabsorption of water and solutes
c) Secretion of waste products
d) Formation of red blood cells
ANS: b) Selective reabsorption of water and solutes
Rationale: The loop of Henle plays a critical role in
concentrating urine by reabsorbing water and salts.
5. The cardiac output is determined by which of the following
factors?
a) Heart rate only
b) Stroke volume only
c) Total blood volume
d) Both heart rate and stroke volume
ANS: d) Both heart rate and stroke volume
©/2025
, Rationale: Cardiac output is calculated as the product of heart
rate and stroke volume, reflecting the heart’s efficiency and
capacity.
Fill-in-the-Blank Questions:
6. The ____________ is known as the pacemaker of the heart,
initiating the cardiac cycle.
ANS: Sinoatrial (SA) node
Rationale: The SA node sets the rhythm of the heartbeat by
generating electrical impulses that spread throughout the heart
muscle.
7. In the human body, the hormone responsible for lowering
blood glucose levels is ____________.
ANS: Insulin
Rationale: Insulin, secreted by the pancreas, facilitates the
uptake of glucose into cells, thereby lowering blood glucose
levels.
8. The point where a nerve and muscle fiber connect is known as
the ____________.
ANS: Neuromuscular junction
©/2025
