Physiology and Regulation Questions

The process of delivering oxygen to body tissues and cells is known as:

• Respiration

• Perfusion

• Oxygenation

• Ventilation

• Diffusion

Which structure in the brain is primarily responsible for regulating the rhythm of breathing?

• Cerebellum

• Medulla oblongata

• Hypothalamus

• Thalamus

• Cerebrum

The pons plays a key role in:

• Controlling heart rate

• Modifying the breathing rhythm for smooth respiration

• Regulating blood pH

• Detecting oxygen concentration

• Increasing surfactant production

Central chemoreceptors respond mainly to:

• Low oxygen levels

• Blood pressure changes

• CO2 and pH in cerebrospinal fluid

• Sodium concentration

• Hemoglobin saturation

The phrenic nerve primarily stimulates which muscle?

• Intercostal muscles

• Diaphragm

• Abdominal muscles

• Pectoralis major

• Sternocleidomastoid

Peripheral chemoreceptors are located in:

• Carotid and aortic bodies

• Medulla oblongata

• Hypothalamus and pons

• Cerebellum

• Larynx

The process of gas movement between alveoli and capillaries is governed by:

• Active transport

• Osmosis

• Diffusion

• Filtration

• Convection

What percentage of oxygen is carried bound to hemoglobin?

• 50%

• 60%

• 75%

• 97%

• 100%

The exchange of gases between the atmosphere and lungs is called:

• Internal respiration

• Cellular respiration

• Alveolar-capillary exchange

• Ventilation

• Diffusion

A decrease in blood oxygen is termed:

• Hypoxia

• Hypoxemia

• Hypercapnia

• Dyspnea

• Apnea