Practice Questions

TLS Online TPP Program

#Question id: 314

Which statement explains the cleaning action of soap on greasy dishes?

#1. Molecules and their Interaction Relevant to Biology

The soap changes the water-solubility of the grease so that it is easily dissolved by the water.
The grease is trapped inside the hydrophobic interior of micelles made of soap molecules.
The soap chemically breaks down the grease into smaller, more water-soluble molecules.
The soap hydrates the grease with its polar head groups and holds it in suspension.

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TLS Online TPP Program

#Question id: 16113

#7. System Physiology – Animal

Which of the behavioural components may not contribute by reducing the exposure of skin to the cold?

TLS Online TPP Program

#Question id: 16114

#7. System Physiology – Animal

Which of the following hormones are thermogenic?

TLS Online TPP Program

#Question id: 16115

#7. System Physiology – Animal

Cold environmental temperatures:

TLS Online TPP Program

#Question id: 16116

#7. System Physiology – Animal

Which of the following hormones acts synergistically with sympathetic nervous system?

TLS Online TPP Program

#Question id: 16118

#7. System Physiology – Animal

Following statements are regarding to the heat production by the activation of sympathetic nervous system.

A. Activation is stimulation of β receptors in brown fat, which increases metabolic rate and heat production.

B. Activation is stimulation of α2 receptors in brown fat, which increases metabolic rate and heat production.

C. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasoconstriction. Vasoconstriction reduces blood flow to the surface of the skin.

D. Stimulation of α1 receptors in vascular smooth muscle of skin blood vessels, producing vasodilation. Vasodilation reduces blood flow to the surface of the skin.

Which of the following combination is correct?

TLS Online TPP Program

#Question id: 16119

#7. System Physiology – Animal

Following statements are regarding to Shivering, which is the most potent mechanism for increasing heat production in the body.

A. Cold environmental temperatures activate centers in the posterior hypothalamus during shivering, which then activate the α and γ motoneurons innervating skeletal muscle.

B. Shivering involves skeletal muscle contracts rhythmically, generating heat and raising body temperature.

C. Shivering involves stimulation of Na+-K+ ATPase and raising body temperature.

D. Shivering involves stimulation of β receptors in brown fat, which increases metabolic rate and heat production.

Which of the following combination is correct?