Practice Science TEAS Test

Correct Answer: B

Rationale: The correct answer is B: Luteinizing Hormone. The pituitary gland secretes luteinizing hormone, which plays a crucial role in the reproductive system by stimulating ovulation in females and testosterone production in males. Estrogen, progesterone, and testosterone are not directly released by the pituitary gland but are instead produced by other glands such as the ovaries, testes, and adrenal glands. Therefore, B is the correct choice as it is the hormone directly released by the pituitary gland.

Correct Answer: B

Rationale: The correct answer is B: Malaria. Malaria is caused by a protozoan parasite called Plasmodium, which is transmitted through the bite of infected mosquitoes. Protozoan parasites are single-celled organisms that can cause various infectious diseases in humans. Measles (A), mumps (C), and mononucleosis (D) are caused by viruses, not protozoan parasites. Viruses are different from protozoa in terms of structure, replication, and mode of infection. Therefore, the correct choice is B as it aligns with the characteristic of being caused by a protozoan parasite.

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: A

Rationale: The correct answer is A: Bicarbonate. CO2 is primarily transported in the blood as bicarbonate ions. This process involves carbonic anhydrase converting CO2 into carbonic acid, which then dissociates into bicarbonate and hydrogen ions. Bicarbonate is the main form in which CO2 is transported from tissues to the lungs for elimination. Choice B, carbamino compounds, refers to CO2 bound to amino groups in hemoglobin, but this method is a minor mode of CO2 transport. Choice C, None of these, is incorrect as bicarbonate is indeed the primary mode of CO2 transport. Choice D, Plasma, is incorrect as CO2 is not directly transported in the blood as plasma but rather in the form of bicarbonate ions.

Correct Answer: B

Rationale: The correct answer is B: Vein. Veins carry blood back to the heart, while arteries carry blood away from the heart. Capillaries are tiny blood vessels where exchange of nutrients and waste occurs. Lymphatic vessels carry lymph fluid, not blood. Veins have valves to prevent backflow and low pressure due to distance from the heart.