TEAS 7 SCIENCE EXAM - 300 PRACTICE
QUESTIONS WITH ANSWERS AND RATIONALES
Anatomy & Physiology (Questions 1-120)
Question 1
Which of the following tissues lines the interior surfaces of the heart?
A) Epicardium
B) Myocardium
C) Endocardium
D) Pericardium
Correct Answer: C) Endocardium
Rationale: The endocardium is the innermost layer of the heart that lines the
chambers and covers the heart valves. The epicardium is the outer layer, the
myocardium is the muscular middle layer responsible for contraction, and the
pericardium is the protective sac surrounding the heart .
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Question 2
Which of the following terms describes the relaxation of the chambers of the
heart during the cardiac cycle?
,A) Systole
B) Tachycardia
C) Diastole
D) Bradycardia
Correct Answer: C) Diastole
Rationale: Diastole is the phase of the cardiac cycle when the heart chambers
relax and fill with blood. Systole is the contraction phase. Tachycardia and
bradycardia refer to abnormally fast and slow heart rates, respectively .
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Question 3
Which of the following layers of skin lacks blood vessels?
A) Hypodermis
B) Papillary layer
C) Epidermis
D) Reticular layer
Correct Answer: C) Epidermis
Rationale: The epidermis is the outermost layer of skin and is avascular (lacks
blood vessels). It receives nutrients through diffusion from the underlying dermis.
,The dermis (including papillary and reticular layers) and hypodermis both contain
blood vessels .
---
Question 4
Which of the following types of neurons is responsible for releasing a
neurotransmitter that stimulates a muscle cell to contract?
A) Sensory neuron
B) Interneuron
C) Motor neuron
D) Neuroglia
Correct Answer: C) Motor neuron
Rationale: Motor neurons (efferent neurons) transmit signals from the central
nervous system to effector cells such as muscle fibers, causing them to contract.
Sensory neurons carry information toward the CNS, and interneurons connect
neurons within the CNS .
---
Question 5
Which of the following structures filters excess solutes from the blood?
A) Gallbladder
, B) Spleen
C) Kidney
D) Pancreas
Correct Answer: C) Kidney
Rationale: The kidneys filter blood to remove waste products and excess solutes,
producing urine. The gallbladder stores bile, the spleen filters blood of old red
blood cells and pathogens, and the pancreas produces digestive enzymes and
hormones .
---
Question 6
Which of the following organs are found in the thoracic cavity?
A) Thymus, heart, lungs
B) Liver, stomach, pancreas
C) Kidneys, adrenal glands
D) Spleen, gallbladder
Correct Answer: A) Thymus, heart, lungs
Rationale: The thoracic cavity contains the heart, lungs, thymus, esophagus, and
major blood vessels. The abdominal cavity contains the liver, stomach, pancreas,
kidneys, and gallbladder .
QUESTIONS WITH ANSWERS AND RATIONALES
Anatomy & Physiology (Questions 1-120)
Question 1
Which of the following tissues lines the interior surfaces of the heart?
A) Epicardium
B) Myocardium
C) Endocardium
D) Pericardium
Correct Answer: C) Endocardium
Rationale: The endocardium is the innermost layer of the heart that lines the
chambers and covers the heart valves. The epicardium is the outer layer, the
myocardium is the muscular middle layer responsible for contraction, and the
pericardium is the protective sac surrounding the heart .
---
Question 2
Which of the following terms describes the relaxation of the chambers of the
heart during the cardiac cycle?
,A) Systole
B) Tachycardia
C) Diastole
D) Bradycardia
Correct Answer: C) Diastole
Rationale: Diastole is the phase of the cardiac cycle when the heart chambers
relax and fill with blood. Systole is the contraction phase. Tachycardia and
bradycardia refer to abnormally fast and slow heart rates, respectively .
---
Question 3
Which of the following layers of skin lacks blood vessels?
A) Hypodermis
B) Papillary layer
C) Epidermis
D) Reticular layer
Correct Answer: C) Epidermis
Rationale: The epidermis is the outermost layer of skin and is avascular (lacks
blood vessels). It receives nutrients through diffusion from the underlying dermis.
,The dermis (including papillary and reticular layers) and hypodermis both contain
blood vessels .
---
Question 4
Which of the following types of neurons is responsible for releasing a
neurotransmitter that stimulates a muscle cell to contract?
A) Sensory neuron
B) Interneuron
C) Motor neuron
D) Neuroglia
Correct Answer: C) Motor neuron
Rationale: Motor neurons (efferent neurons) transmit signals from the central
nervous system to effector cells such as muscle fibers, causing them to contract.
Sensory neurons carry information toward the CNS, and interneurons connect
neurons within the CNS .
---
Question 5
Which of the following structures filters excess solutes from the blood?
A) Gallbladder
, B) Spleen
C) Kidney
D) Pancreas
Correct Answer: C) Kidney
Rationale: The kidneys filter blood to remove waste products and excess solutes,
producing urine. The gallbladder stores bile, the spleen filters blood of old red
blood cells and pathogens, and the pancreas produces digestive enzymes and
hormones .
---
Question 6
Which of the following organs are found in the thoracic cavity?
A) Thymus, heart, lungs
B) Liver, stomach, pancreas
C) Kidneys, adrenal glands
D) Spleen, gallbladder
Correct Answer: A) Thymus, heart, lungs
Rationale: The thoracic cavity contains the heart, lungs, thymus, esophagus, and
major blood vessels. The abdominal cavity contains the liver, stomach, pancreas,
kidneys, and gallbladder .
