Special Topics In Physiology

Question 1

What is the role of fat & skin in terms of regulation of body temperature?

Answer 1

Fat: insulator
Skin: radiator system (when cold: blood vessels constrict; when hot: dilate)

Question 2

Most of the body heat is lost through which way?

Answer 2

Radiation > Evaporation > conduction to air > conduction to objects

Question 3

What is the pathophysiology of fever?

Answer 3

Pyrogens -> increases IL-1 (alpha & beta), IL6 -> increases prostaglandins -> increases set-point temperature in hypothalamus

Question 4

Excessive sweating causing fainting

Answer 4

Heat Exhaustion

Question 5

High temperature causing tissue damage & impaired responses

Answer 5

Heat stroke

Question 6

High temp secondary to the use of succinylcholine & halothane?

Answer 6

Malignant Hyperthermia

Question 7

DOC for Malignant Hyperthermia

Answer 7

Dantrolene

Question 8

Vasodilator

Keeps ductus arteriosclerosis

Answer 8

Prostaglandin E1

Question 9

Antipyretic

Change in receptor in hypothalamus

Answer 9

Prostaglandin E2

Question 10

Cell ATP, cell phosphocreatine
First 8-10 seconds

Ex: 100m dash, jumping, diving

Answer 10

Phosphagen energy system

Question 11

Anaerobic; reconstitute ATP & phosphocreatine
For 1.3 top 1.6 minutes after Phosphagen system used up

Ex: tennis, soccer

Answer 11

Glycogen - Lactic Acid System

Question 12

Aerobic; reconstitute ATP, phosphocreatine, glycogen-lactic acid cycle
? Carbohydrate loading

For unlimited time as long as with energy supply
Ex: long distance jogging

Answer 12

Aerobic system

Question 13

What is the basis for muscle endurance?

Answer 13

Glycogen levels in diet

Question 14

What is the best diet for muscle glycogen recovery?

Answer 14

High Carbohydrate diet

Question 15

How long does it take to recover muscle glycogen?

Answer 15

2 days (high carb diet)

Question 16

An increase in muscle strength is always due of what?

Answer 16

Increase in muscle size