Temperature Regulation Assignment

During sweating, body temperature…

decreases

increases

remains the same

decreases and then increases

Thermoregulation is the control of body…

fluids

glucose

temperature

Temperature receptors are found in the brain and also in the…

liver

heart

skin

mouth

This happens when it is cold in order to generate heat from respiration.

Seizures

Crying

Yawning

Shivering

What is the normal core body temperature for humans?

36 degrees C

37 degrees C

38 degrees C

39 degrees C

Receptors inside the thermoregulatory centre detect blood…

oxygen

temperature

pressure

When we are too cold, these trap a layer of air for insulation.

Hairs

Mucus

Sweat glands

Capillaries

Information about skin temperature is sent to the brain by…

nerve cells

heart cells

brain cells

muscle cells

The part of the brain which is involved with temperature control is called the…

osmoregulatory centre

thermoreceptor centre

thermoregulatory centre

cortex

10.

Which process cools the skin during sweating?

Transpiration

Respiration

Condensation

Evaporation

Section B

1.

The heat transfer mechanism that occurs between the sun and the outer layer of the skin is called what?
- A.
  
  Conduction
- B.
  
  Convection
- C.
  
  Radiation
- D.
  
  Evaporation
2.

The heat transfer mechanism that occurs between arteries and veins in a countercurrent exchange is called what?
- A.
  
  Conduction
- B.
  
  Convection
- C.
  
  Radiation
- D.
  
  Evaporation
3.

What is the major heat source to retain body temperature for a nude 65-kg adult person in a 29^oC/84.2^oF environment?
- A.
  
  Brain
- B.
  
  Brown adipose tissue
- C.
  
  Liver
- D.
  
  Skeletal muscle
- E.
  
  White adipose tissue
4.

Which of the following is a human thermoregulatory response controlled by cholinergic sympathetics?
- A.
  
  Brown adipose tissue thermogenesis
- B.
  
  Hand vasomotion
- C.
  
  Shivering thermogenesis
- D.
  
  Sweat secretion
- E.
  
  Thermoregulatory behavior
5.

Which of the following will most faithfully reflect changes in human core temperature that could be caused by immersion in a warm body bath?

Discuss
- A.
  
  Oral temperature
- B.
  
  Rectal temperature
- C.
  
  Axillary temperature
- D.
  
  Tympanic temperature
- E.
  
  Esophageal temperature at the cardia
6.

In a man passively warmed such that his mean skin temperature reaches 40.5^oC/104.9^oF, which of the following circulatory responses will occur?

Discuss
- A.
  
  Increased cardiac output, decreased splanchnic blood flow
- B.
  
  Increased cardiac output, increased muscle blood flow
- C.
  
  Unchanged cardiac output, decreased right atrial pressure
- D.
  
  Unchanged cardiac output, decreased renal blood flow
7.

Which of the following is true at the beginning of the rising phase of fever?
- A.
  
  Sweat secretion is stimulated
- B.
  
  Mean skin temperature is below normal
- C.
  
  Muscle blood flow is decreased
- D.
  
  Behavioral thermoregulatory responses are inhibited
- E.
  
  Warm-sensitive neurons in the integration center are excited
8.

The principal physical mechanism that accounts for the transfer of heat within the body is what?
- A.
  
  Conduction
- B.
  
  Convection
- C.
  
  Radiation
- D.
  
  Evaporation
9.

When the environmental temperature increases moderately, what happens to blood flow to the skin?

Discuss
- A.
  
  It decreases to stop the transport of heat from the skin surface to deeper tissues
- B.
  
  It decreases because the local thermoreceptors in the skin sense an increase in body temperature
- C.
  
  It increases because the sweat glands release vasodilators
- D.
  
  It increases as part of the body temperature regulatory mechanisms
- E.
  
  It increases as the metabolic needs of the skin tissue increase
10.

If someone is experiencing heat exhaustion. Which of the following would definitively indicate that they are now at risk for heat stroke?

Discuss
- A.
  
  Increased sympathetic dilation of their blood vessels
- B.
  
  Increased hypotension
- C.
  
  Their skin becomes very dry
- D.
  
  They suddenly faint
- E.
  
  They have an increased volume of sweat production