The Heat Given Off by Living Systems Can Increase the Likelihood

question 69

Multiple Choice

The heat given off by living systems can increase the likelihood that a given chemical reaction will take place.Why?

• A) The enzymes that catalyze reactions in living systems increasingly work better as the temperature decreases.
• B) The heat lowers the internal cellular temperature, enabling reactions to proceed more quickly.
• C) The heat enables photosynthesis to happen more rapidly.
• D) The heat speeds molecular movement, increasing the likelihood of collisions between an enzyme and its substrate.

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Definitions:

Cerebrum

The largest structure of the human brain, consisting of the two cerebral hemispheres connected by the corpus callosum and covered by the cerebral cortex.

Midbrain

A central part of the brainstem involved in vision, hearing, motor control, sleep/wake, arousal, and temperature regulation.

Mesobrain

Another term for the midbrain, which is a portion of the brainstem involved in vision, hearing, motor control, sleep/wake, arousal, and temperature regulation.

Somatic Nervous System

Part of the peripheral nervous system that handles voluntary control of body movements through control of skeletal muscles.