Wk 12 - LE 22: Thermoregulation (exercise, physiological control)

Question 1

Is the set-point temperature set

Answer 1

No, it does slightly vary

Question 2

If set-point is low, the body either???(2)

Answer 2

decreases heat loss or increases heat gain

Question 3

If set-point is high, the body…?

Answer 3

increases heat loss

Question 4

The neural controller of thermoregulation would be?

Answer 4

Hypothalamus

Question 5

The temperature sensors are….?

Answer 5

• deep nerve afferents (thermoreceptors)

- skin nerve afferents (thermoreceptors)

Question 6

Temperature effectors are….

Answer 6

• skin blood vessels

- sweat glands

Question 7

What are skin blood vessels and sweat glands (effectors) controlled by?

Answer 7

efferent nerve supply (autonomic)

Question 8

The anterior nucleus mainly controls

Answer 8

heat loss (when temp too high)

Question 9

The posterior nucleus mainly controls

Answer 9

heat conservation (when temp too low)

Question 10

The paraventricular and supraoptic nucleii are responsible for

Answer 10

water balance

Question 11

Cutaneous vasodilation means…

Answer 11

to dilate blood vessels in the skin

Question 12

If blood flow in skin increases, it means cutaneous vaso____ occurs

Answer 12

vasodilation

Question 13

If your a sensitive sweater, for every 0.1 degree C in core temperature, you will increase your sweat rate at a ___ level

Answer 13

higher

Question 14

The thermostat model relates to the regulation of temperature and incorporates the concept of _____

Answer 14

feedback

Question 15

The physiological control system involved in thermoregulation includes the …. (4)?

Answer 15

• anterior hypothalamus
• temperature sensitive neurons
• skin blood vessels
• eccrine sweat glands