Thermoregulation - Study Workshop

A nurse notices that a post-operative patient is shivering in a cool recovery room. Which nursing action is most appropriate?

• Apply warm blankets and monitor temperature

• Offer warm oral fluids

• Decrease oxygen flow rate

• Encourage ambulation

Answer explanation

Post-operative shivering increases oxygen demand and can lead to hypoxia. Applying warm blankets provides safe passive rewarming and helps restore normothermia. Offering fluids increases the risk for aspiration, lowering oxygen flow worsens hypoxia, and ambulation is unsafe until the patient stabilizes.

Tags

NGSS.HS-LS1-3

A nurse explains to parents that newborns are at higher risk for heat loss because:

• Their hypothalamus is hyperactive

• They sweat excessively

• They have a high surface area-to-body mass ratio

• They store extra adipose tissue

Answer explanation

Neonates lose heat quickly due to large surface area, thin skin, and little subcutaneous fat. Additionally, they cannot shiver effectively to generate heat.

Tags

NGSS.HS-LS1-3

Which physiological structure is primarily responsible for maintaining the body’s internal temperature?

• Thalamus

• Hypothalamus

• Pituitary gland

• Medulla oblongata

Answer explanation

The hypothalamus senses deviations in core temperature and triggers autonomic responses to maintain homeostasis. The thalamus relays sensory input, the pituitary regulates hormones, and the medulla controls breathing and heart rate.

Tags

NGSS.HS-LS1-3

A patient with cellulitis reports chills and sweating. The temperature is 102.8°F (39.3°C). Which nursing intervention is most appropriate?

• Lower room temperature to 60°F

• Restrict fluids to prevent edema

• Apply ice packs to reduce temperature

• Administer antipyretic and encourage oral fluids

Answer explanation

Antipyretics decrease hypothalamic set point; hydration supports thermoregulation and prevents dehydration due to diaphoresis.

When body temperature rises above normal, which mechanism is activated to restore homeostasis?

• Vasoconstriction and shivering

• Sweating and peripheral vasodilation

• Piloerection and increased metabolism

• Decreased perspiration and blood flow to skin

Answer explanation

During hyperthermia, the hypothalamus stimulates sweat gland activity and cutaneous vasodilation to dissipate heat by evaporation and convection. Shivering and vasoconstriction conserve heat and are triggered during cold stress.

Tags

NGSS.HS-LS1-3

A client’s rectal temperature is 38.5 °C. What is this temperature in Fahrenheit?

• 100.4°F

• 99.5°F

• 102.2°F

• 101.3°F

Answer explanation

°F = (°C × 9⁄5) + 32 → (38.5 × 1.8) + 32 = 102.2 °F

A nurse caring for a newborn explains that heat loss occurs when cool air moves across the baby’s skin. This is an example of:

• Radiation

• Evaporation

• Conduction

• Convection

Answer explanation

Convection involves heat loss through air movement across the skin surface. For example, a fan or open window increases convective heat loss, especially in newborns with thin skin and limited thermoregulatory control.

Tags

NGSS.HS-PS3-4

Which of the following are factors that affect body temperature? Select all that apply

• Client age

• Exercise

• Hormone levels

• Environmental Temperatures

• Stress

Tags

NGSS.HS-LS1-3

Which patient population adapts using nonshivering thermogenesis when body temperature decreases?

• Adults

• Infants

• Neonates

• Older adults

Answer explanation

Neonates have a limited amount of vascular brown tissue present at birth. The brown tissue is metabolized for heat production as neonates cannot shiver. This mechanism is called nonshivering thermogenesis. Adults, infants, and older adults may shiver involuntarily to compensate for temperature differences in the body.

Tags

NGSS.HS-LS1-3

Which statement about advantages and disadvantages of selecting temperature measurement sites by a nursing student indicates the need for further teaching?

• "The rectal site for temperature measurement requires lubrication."

• "Skin is a safe and noninvasive site for temperature measurement."

• "The oral site for temperature measurement is contraindicated in infants and children."

• "The tympanic membrane site is difficult to access and requires major position changes."

Answer explanation

The tympanic membrane site is easily accessible for measuring body temperature and requires minor positioning of the patient.