ASVAB General Science Practice Test 452642 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.56
Score	0%	71%

Review

In fermentation, what replaces oxygen in anaerobic respiration?

63% Answer Correctly

	starches
	ascorbic acid or peptides
	water
	lactic acid or alcohol

Solution

If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.

Earth's breathable air is held in which atmospheric layer?

67% Answer Correctly

	stratosphere
	mesosphere
	troposphere
	thermosphere

Solution

The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.

Water freezing or boiling is an example of which of the following?

80% Answer Correctly

	heating
	cooling
	sublimation
	phase transition

Solution

A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.

What is a major difference between the somatic and autonomic nervous systems?

83% Answer Correctly

	each belongs to a different nervous system
	one is inherited, the other is learned
	one controls voluntary activity, one controls involuntary activity
	one controls thinking, the other controls feeling

Solution

Both are part of the peripheral nervous system. The somatic nervous system sends sensory information to the central nervous system and controls voluntary actions while the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.

What part of the nervous system is responsible for controlling involuntary actions like breathing, swallowing, and heartbeat?

63% Answer Correctly

	medulla
	cerebellum
	cerebrum
	spinal cord

Solution

Part of the brainstem, the medulla is the connection between the brain and the spinal cord. It controls involuntary actions like breathing, swallowing, and heartbeat.