Which of the following is true of the essential organ in the reproductive system?
It produces gametes.
It is called the testis in the male.
It is called the gonad in both sexes.
All of the above are true.
The Correct Answer is D
A. It produces gametes: Essential organs (gonads) are defined by their ability to produce sex cells, or gametes (sperm and ova).
B. It is called the testis in the male: The testes are the essential male organs responsible for sperm production.
C. It is called the gonad in both sexes: "Gonad" is the general biological term for the essential reproductive organs in both males (testes) and females (ovaries).
D. All of the above are true: Since choices A, B, and C accurately describe the characteristics and terminology of the essential reproductive organs, this is correct.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. tropomyosin returns to its original position: This happens later in the process; it is a result of calcium removal, not the first event.
B. myosin cross-bridges are prevented from binding to actin: This is the final stage of relaxation where the physical contraction stops.
C. the sarcoplasmic reticulum begins actively pumping calcium back into its sacs: Relaxation officially begins when nerve stimulation stops and the sarcoplasmic reticulum uses active transport to remove Ca 2+ from the sarcoplasm.
D. acetylcholine is released: This is the first step of muscle contraction, not relaxation.
Correct Answer is C
Explanation
A. thymus: The thymus is primarily involved in the maturation of T-lymphocytes for the immune system.
B. thyroid: The thyroid is an endocrine gland that regulates metabolism through hormone production.
C. spleen: The spleen filters blood (defense), can produce blood cells in emergencies (hematopoiesis), destroys old RBCs/platelets, and stores blood.
D. thalamus: The thalamus is a sensory relay station in the brain.
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