Practice Science TEAS Test

Correct Answer: B

Rationale: The correct answer is B: Glucose. Glucose is a monosaccharide because it is a single sugar molecule, the simplest form of carbohydrates. Starch (A) is a polysaccharide made up of multiple glucose units. Cellulose (C) is also a polysaccharide, not a monosaccharide. Sucrose (D) is a disaccharide composed of glucose and fructose molecules. So, only glucose (B) fits the definition of a monosaccharide in this question.

Correct Answer: B

Rationale: The correct answer is B: Cerebrum. The cerebrum is responsible for voluntary muscle movements as it houses the motor cortex, which controls voluntary movements. The medulla oblongata (A) controls involuntary functions like breathing and heart rate. The hypothalamus (C) regulates body temperature, hunger, and thirst. The thalamus (D) serves as a relay station for sensory information. Therefore, the cerebrum is the correct choice for voluntary muscle movements.

Correct Answer: A

Rationale: Abduction is the movement away from the midline of the body. This is the correct answer because abduction refers to a lateral movement away from the body's midline, such as when raising your arms sideways. Option B is incorrect because it describes flexion, which decreases the angle of a joint. Option C is incorrect as it describes extension, increasing the angle of a joint. Option D is also incorrect as it describes adduction, moving towards the body's midline.

Correct Answer: C

Rationale: The correct answer is C: Parietal lobe. The parietal lobe is responsible for processing sensory information, perception of stimuli, and spatial reasoning. It integrates information from different senses to create a coherent understanding of the world around us. The frontal lobe (A) is mainly involved in executive functions and motor control. The occipital lobe (B) is primarily responsible for processing visual information. The temporal lobe (D) is associated with auditory perception, memory, and language processing. Therefore, the parietal lobe is the most suitable choice for sensation, perception, and spatial reasoning.

Correct Answer: B

Rationale: The correct answer is B: Retina. The retina is a layer of light-sensitive cells located at the back of the eye that detects light and converts it into signals for the brain through the optic nerve. The iris (A) controls the amount of light entering the eye, the lens (C) helps to focus light onto the retina, and the pupil (D) regulates the amount of light entering the eye, but they do not convert light into signals for the brain like the retina does.